Answer:
0.3km/min
Explanation:
2.4/8=24/80=3/10=0.3
Levi drove south for two hours. The trip was 160 kilometers long. Halfway there, he looked at his spedometer and saw 40 km per hour. What was his instantaneous speed at that time?
Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.
If Levi drove south for two hours and covered a distance of 160 kilometers, then his average speed for the entire trip was:
average speed = total distance / total time = 160 km / 2 h = 80 km/h
Let d(t) be the distance that Levi has driven at time t. Then we have:
d(0) = 0 (starting position)
d(2) = 160 km (final position)
d(1) = 80 km (distance traveled halfway through the trip)
The average speed between time t1 and t2 is given by:
average speed = (d(t2) - d(t1)) / (t2 - t1)
At time t=1, we have:
average speed = (d(2) - d(1)) / (2 - 1) = (160 km - 80 km) / 1 h = 80 km/h
This is consistent with the earlier calculation of the average speed for the entire trip.
The instantaneous speed at time t=1 is given by the derivative of the distance function with respect to time:
instantaneous speed = d'(1)
Using calculus, we can find:
d(t) = 40t^2
d'(t) = 80t
Therefore, the instantaneous speed at time t=1 is:
instantaneous speed = d'(1) = 80 km/h
So Levi's instantaneous speed at the moment he looked at his speedometer was 80 km/h, which is consistent with his average speed for the entire trip.
learn more about instantaneous speed here
https://brainly.com/question/2321847
#SPJ1
Which of the following statements best explains the relationship between the common property regime and energy distribution? The common property regime ____.
may lead to inequitable availability of energy resources or, worse, scarcity
is the direct result of energy security
regime will provide energy security
will prevent energy scarcity
Answer:
the anser is B
Explanation:
You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?
Answer:
By watching in the door lock
Answer:
.-. you can flip a switch and look at the bottom or the top of the door and see if there’s a light of there isn’t then flip another one.
also the other chat that we were talking on got deleted
A ski jumper starts from rest from point A at the top of a hill that is a height h1 above point B at the bottom of the hill. The skier and skis have a combined mass of 80 kg. The skier slides down the hill and then up a ramp and is launched into the air at point C that is a height of 10 m above the ground. The skier reaches point C traveling at 42m/s.The skier leaves the ramp at point C traveling at an angle of 25°above the horizontal.
Calculate the horizontal distance from the point directly below C to where the skier lands.
The horizontal distance from the point directly below C to where the skier lands is 54.2 m.
Determining the horizontal distanceApplying conservation of energy and conservation of momentum principles.
First, let's find the initial potential energy of the skier at point A:
PE1 = mgh1
= (80 kg)(9.81 m/s^2)(h1)
Next, let's find the final kinetic energy of the skier at point C:
KE2 = (1/2)mv2^2
= (1/2)(80 kg)(42 m/s)^2
Since there is no friction,
PE1 = KE2 + PE3
where PE3 is the potential energy of the skier at point C:
PE3 = mgh3 = (80 kg)(9.81 m/s^2)(10 m)
Substituting the values, we get:
(80 kg)(9.81 m/s^2)(h1) = (1/2)(80 kg)(42 m/s)^2 + (80 kg)(9.81 m/s^2)(10 m)
to determin h1,
h1 = (1/2)(42 m/s)^2/9.81 m/s^2 + 10 m
h1 = 144.8 m
Therefore, the height of the hill is 144.8 m.
Since there is no external force acting on the skier in the horizontal direction, the horizontal momentum is conserved:
mvi = mvx
vx = v2cos(25°)
Substituting the values, we get:
vi = (42 m/s)cos(25°)
vi = 37.9 m/s
Therefore, the initial horizontal velocity of the skier at point C is 37.9 m/s.
to determine time of flight:
h = (1/2)gt^2
t = √(2h/g)
t = √(2(10 m)/(9.81 m/s^2))
t = 1.43 s
applying the horizontal velocity and the time of flight to find the horizontal distance traveled:
d = vixt
d = (37.9 m/s)(1.43 s)
d = 54.2 m
The horizontal distance from the point directly below C to where the skier lands is 54.2 m.
Learn more on determining horizontal distance here https://brainly.com/question/29661080
#SPJ1
Answer:
To solve this problem, we can use the conservation of energy and the conservation of momentum. We can assume that there is no friction or air resistance, so the total mechanical energy of the skier is conserved throughout the motion.
Let's denote the initial height of the hill as h1, the height of point C above the ground as h2, the horizontal distance from point A to the point directly below C as x, and the angle of the skier's velocity vector with respect to the horizontal as θ.
First, we can calculate the speed of the skier at the bottom of the hill, point B, using conservation of energy:
mgh1 = (1/2)mvB^2 where m is the mass of the skier and vB is the speed of the skier at point B.
Solving for vB, we get:
vB = sqrt(2gh1)
Next, we can calculate the velocity of the skier at point C using conservation of energy:
mgh1 = (1/2)mvB^2 + (1/2)mvC^2
where vC is the speed of the skier at point C.
Solving for vC, we get:
vC = sqrt(2gh1 + vB^2)
We can also express the velocity vector at point C in terms of its x and y components:
vCx = vCcos(θ)
vCy = vCsin(θ)
Using conservation of momentum, we can find the horizontal distance x from the point directly below C to where the skier lands:
mvCx(h2/(-vCy)) = mvCx(t) + (1/2)gt^2
where t is the time taken for the skier to reach the ground and we have used the fact that the vertical displacement from point C to the ground is h2. We can solve for t by substituting vCy = vC*sin(θ) and solving the quadratic equation:
(1/2)gt^2 + vC*sin(θ)*t - h2 = 0
Solving for t, we get:
t = (-vCsin(θ) + sqrt(vC^2sin(θ)^2 + 2gh2))/g
Finally, we can substitute this expression for t into the equation for x to get:
x = vCx*t
Substituting the expressions for vCx, t, and vC, we get:
x = (vC^2sin(θ)cos(θ) - sqrt(vC^4sin(θ)^2cos(θ)^2 + 2gh2vC^2sin(θ)^2))/(g*sin(θ))
Plugging in the given values, we get:
x ≈ 184.5 meters
Therefore, the horizontal distance from the point directly below C to where the skier lands is approximately 184.5 meters.
A series circuit has three resistors each on different paths and connected to a 120 v battery. Resistor 1 has a resistance of 5. 0 ohms. Resistor 2 has a resistor of 7. 5 ohms and resistor 3 has a resistance of 9. 5 ohms
The total voltage drop across all resistors is equal to the battery voltage, which is 120 V. The formula to calculate the total resistance in a series circuit is: Rtotal = R₁ + R₂ + R₃
Rtotal = R₁ + R₂ + R₃
Rtotal = 5.0 + 7.5 + 9.5
Rtotal = 22.0 ohms
The total resistance in the circuit is 22.0 ohms.
The formula to calculate the total current in a series circuit is:
I = Vtotal / RtotalI
= 120 / 22.0I
= 5.45 A
The total current in the circuit is 5.45 A.
The formula to calculate the voltage drop across each resistor is:
V = IRV₁
= 5.45 A × 5.0 ohms
= 27.3 VV₂
= 5.45 A × 7.5 ohms
= 40.9 VV₃
= 5.45 A × 9.5 ohms
= 51.8 V
The voltage drop across resistor 1 is 27.3 V.
The voltage drop across resistor 2 is 40.9 V.
The voltage drop across resistor 3 is 51.8 V.
The total voltage drop across all resistors is equal to the battery voltage, which is 120 V.
Therefore, 27.3 V + 40.9 V + 51.8 V
= 120 V.
The total voltage drop across all resistors is equal to the battery voltage, which is 120 V.
To know more about voltage drop, refer
https://brainly.com/question/28786270
#SPJ11
the normal formula to find force is F = m*a. What kind of math do you need to do
to find the mass of an object?
- Divide: F / a
- Divide: a / F
- Multiply: F* a
- Subtract: F - a
\(\\ \sf\Rrightarrow F=ma\)
Take a to leftAs it's multiplied on right side it will be divided on right side.\(\\ \sf\Rrightarrow \dfrac{F}{a}=m\)
Or
\(\\ \sf\Rrightarrow m=\dfrac{F}{a}\)
A solid non-conducting sphere of radius R carries a charge Q distributed uniformly throughout its volume. At a radius r,(r
C
N
Determine the electric field at r If the same charge Q were distributed uniformly throughout a sphere of radius 18.5 R (in
C
N
).
The electric field at r inside the sphere is given by E = k(Qr / R³), where k is the electrostatic constant.
If the same charge Q were distributed uniformly throughout a sphere of radius 18.5R, we can use the same formula to calculate the electric field at r.
To determine the electric field at a radius r due to a solid non-conducting sphere of radius R carrying a uniformly distributed charge Q, we can use Gauss's law.
1. Electric field at radius r for a sphere of radius R:
According to Gauss's law, the electric field at a radius r inside a uniformly charged solid sphere is given by E = k(Qr / R³), where k is the electrostatic constant (k ≈ 8.99 × 10^9 N m²/C²), Q is the total charge distributed uniformly throughout the sphere, and R is the radius of the sphere.
2. Electric field at radius r for a sphere of radius 18.5R:
If the same charge Q were distributed uniformly throughout a sphere of radius 18.5R, we can use the same formula to calculate the electric field at radius r. The values of Q and R in the formula will change accordingly.
To summarize, the electric field at a radius r for a solid non-conducting sphere of radius R with a uniformly distributed charge Q is given by E = k(Qr / R³). By substituting the appropriate values of Q, R, r, and k into the formula, we can calculate the electric field at r.
The same formula can be used if the charge Q is distributed uniformly throughout a sphere of a different radius, such as 18.5R.
Learn more about electric field here:
https://brainly.com/question/30544719
#SPJ11
A student has 2 identical metal cubes.Each with a volume of 20 cm .The first cube has a mass of 80 g and the second cube has a mass of 120 g .Which cube has the higher density
the floor of a railroad flatcar is loaded with loose crates having a coefficient of static friction of 0.33 with the floor. if the train is initially moving at a speed of 40 km/h, in how short a distance can the train be stopped at constant acceleration without causing the crates to slide over the floor?
The shortest braking distance at which the train should be stopped will be equal to 19.10 m.
In order to solve this problem we use the concept of Newton's Second Law of Motion according to which the force applied on any body is equal to the product of mass and acceleration. We divide the force into two components that is on horizontal axis and vertical axis.
The forces on vertical axis can be written as
N - W = 0
N = W = mg
where m is mass of the object and g is acceleration due to gravity, W is weight of object, N is external force.
The forces on horizontal axis can be written as
-Fr = ma
-μN = ma
-μ(mg) = ma
a = -μg
where a is acceleration, μ is coefficient of friction, Fr is the frictional force.
a = (-0.33)×(9.8) m/s²
a = -3.23 m/s² (it is negative because the train is stopping due to this)
We calculate the distance using the kinematics equation:
V² = U² + 2aS
where V is final velocity, U is initial velocity, a is acceleration and S is displacement.
S = (V² - U²)/2a
When the train stops the speed is zero that is final velocity is zero.
U = 40km/h = 40×(5/18) m/s = 11.11 m/s
S = ( 0 - 11.11²) / 2 (-3.23)
S = 19.10 m
Learn more about Frictional force at:
brainly.com/question/13371241
#SPJ4
If the ball has a positive electric charge, what should the charge of the coilgun be to push the ball away?
A)positive
B) negative
C)neutral
Answer:
A
Explanation:if the things have the same charge they will repel makeing the ball move away form its positively charged guy = that the coil gun works.
a 30 kg cart is travelling in a zero friction environment at a constant velocity of 5m/s. It's about to go up a very steep hill. How high will the cart be when the velocity changes to zero? PLEASE HELP
Answer:
1.27551m
Explanation:
This is a simple energy convertion problem. Since there is no friction, and assuming no air drag and other external factors, mechanical energy should be conserved in this system.
Thus, we get:
\(KE_{initial} + PE_{initial} = KE_{final} + PE_{final}\)
We also know that the gravitational potential energy is equal to mgh, while the KE can be calculated using \(\frac{1}{2}mv^2\)
One thing to note here, is that the final KE will be 0, as there is no velocity at the end. Furthermore, we also can set the initial PE as 0 as we are looking at relative height, and at the start it is at h=0.
\(KE_{initial} = PE_{final}\)
Plugging in:
\(\frac{1}{2}*30*5^2 = 30*9.8*h\)
Solving for h, we get 1.27551m
jupiter's moon io is thought to be the volcanically active world in our solar system. what is the inferred source of heat? group of answer choices io is close to jupiter, and the strong tidal forces on planet produce frictional heating of the planet. it is a mystery; it should be very cold because it is the same size as the moon but far from the sun. io has a strong magnetic field as does jupiter, so as io moves through jupiter's magnetic field, large electrical currents are generated, which heat the planet. very high abundances of radioactive elements have been detected on the planet.
Jupiter's moon IO is the volcanically active world in our solar system because moon io is closer to Jupiter, and the strong tidal forces on the planet will produce frictional heating of the planet.
Moon Io is Jupiter's fifth moon and is the most volcanically active body in the solar system. Io's surface is dotted with hundreds of volcanoes, some hundreds of kilometers high and spewing sulfurous plumes.
Vulcan moon is Jupiter's third largest and innermost Galilean moon, caught in a gravitational tug-of-war between Jupiter and her two nearby Jupiter moons Europa and Ganymede. These tidal forces create the heat that fuels Io's intense volcanic activity, according to NASA. Io's surface changes with astonishing speed. Volcanic fissures allow lava to seep into the moon's surface, filling impact craters and creating new floodplains of liquid rock.
Learn more about the moon io in
https://brainly.com/question/19129015
#SPJ4
You are gardening in the peak of summer, it hasn't rained in a week, and your plants are looking rough. You decide to water the plants for an hour. The next day you come back to the garden, and the plants look in worse shape than they did previously, as if none of that water made it to the plant. With what you know from class, please try and explain what is happening to your plants.
In the peak of summer, it hasn't rained in a week, and the plants are looking rough, so watering the plants for an hour is a good idea.
However, the next day, you come back to the garden, and the plants look in worse shape than they did previously, as if none of that water made it to the plant. Plants absorb water through their roots. The root system of a plant is responsible for drawing water and nutrients from the soil. A plant's root system must be able to absorb water quickly in order for the plant to grow and thrive. When the soil around the root system is dry, the roots will stop growing and will not be able to absorb water.
It may even start to die. Watering plants during the peak of summer is important because it will help keep the soil moist and prevent the roots from drying out. However, watering a plant too much can be harmful. If a plant is overwatered, the water may not be able to penetrate the soil and reach the roots. Instead, it may just sit on top of the soil, causing the roots to rot and die. This can cause the plant to wilt and die.To summarize, if the soil around the plant is too dry, the roots may not be able to absorb the water you gave them, causing the plant to look worse than before. Conversely, overwatering can also be harmful because the water may not be able to penetrate the soil and reach the roots, causing the roots to rot and die.
To know more about plants visit:
https://brainly.com/question/31220793
#SPJ11
A car accelerates from rest to 90km/hr in 10 seconds. what is its acceleration in m/s2
Answer:
\(2.5m/s^2\)
Explanation:
v = 90km/h = 90000m/h = 1500m/min = 25m/s
a = v/t
a = 25m/s / 10s = \(2.5m/s^2\)
How are waves reflected and refracted at boundaries between mediums?
if three 2.2 kω resistors are connected in series across a 50 v source, pt equals ________.a. 104.2 mW b. 379 mW c. 52.08 mW d. 402 mW
If three 2.2 kω resistors are connected in series across a 50 v source, pt equals 379 mW. The answer is OPTION B
When the current runs sequentially through the resistors, they are said to be in series. Take a look at Figure 10.3. 2, which depicts three resistors connected in series with a voltage that is equal to Vab. The current through each resistor is the same since there is only one path for the charges to travel through.
Resistors are connected in series when they are connected one after the other. This is seen below. You add up the individual resistances to determine the total overall resistance of several resistors connected in this manner. The following equation is used to accomplish this: Rtotal = R1 + R2 + R3 and so forth. The answer is OPTION B
To learn more about resistors, click here.
https://brainly.com/question/17390255
#SPJ4
If three 2.2 kω resistors are connected in series across a 50 v source, pt equals 379 mW. The answer is OPTION B
When the current runs sequentially through the resistors, they are said to be in series. Take a look at Figure 10.3. 2, which depicts three resistors connected in series with a voltage that is equal to Vab. The current through each resistor is the same since there is only one path for the charges to travel through.
Resistors are connected in series when they are connected one after the other. This is seen below. You add up the individual resistances to determine the total overall resistance of several resistors connected in this manner. The following equation is used to accomplish this: Rtotal = R1 + R2 + R3 and so forth. The answer is OPTION B
To learn more about resistors, click here.
https://brainly.com/question/17390255
#SPJ4
How does the force work
Answer:
A force is a push or a pull.
Explanation:
Example: A boy is pushing a box. He has to push the box to go forward or pull it to go backwards.
Hope this helped
A sphere of radius 10.0cm is moulded into a uniform cylindrical wire of same radius r calculate length in millimeters
Answer:
133.33 mm
Explanation:
First we need to find the volume of the sphere. The volume of a sphere is given by:
V = (4/3) * pi * r^3
With a radius of 10 cm, we have:
V = (4/3) * pi * r^3 = 4188.79 cm3
The sphere will be moulded into a cylinder, so the volume will be the same. The volume of a cylinder is:
V = pi * r^2 * h
Where h is the height of the cylinder, and for this case, it will be the length.
The radius is the same old radius, so we have:
4188.79 = pi * 10^2 * h
h = 4188.79 / 100pi = 13.3333 cm
In millimeters, we have h = 133.33 mm
A boat takes 3. 30 hours to travel 50. 0 km down a river, then 5. 40 hours to return. What is the speed of the river?
The speed of the river can be determined by finding the difference between the speed of the boat going downstream and the speed of the boat going upstream.
To find the speed of the boat going downstream, we can use the formula speed = distance/time, or s = d/t. Plugging in the given values, we get s = 50.0 km/3.30 hours = 15.15 km/hour. Similarly, to find the speed of the boat going upstream, we use the same formula and get s = 50.0 km/5.40 hours = 9.26 km/hour. To find the speed of the river, we can take the difference between these two speeds and divide by 2, since the river's speed affects the boat's speed both downstream and upstream. So the speed of the river is (15.15 km/hour - 9.26 km/hour)/2 = 2.95 km/hour. Therefore, the speed of the river is 2.95 km/hour.
Learn more about speed here:https://brainly.com/question/27888149
#SPJ11
A spring with spring constant 58N/cm is stretched 4cm. How much force is it applying
Answer:
232 N
Explanation:
By Hooke's law, the force applied to a spring is proportional to the stretch of the spring, so
F = kx
Where F is the force, k is the spring constant and x is how much it is stretched.
So, replacing k by 58N/cm and x by 4 cm, we get
F = (58 N/cm)(4 cm)
F = 232 N
Therefore, the force applied is 232 N
HELP!!!!!!! if you were to ride a bicycle on a rocky pathway, how much friction would there be and what would be the thermal and friction energy level?
Answer: The equation for calculating friction is fr=FR/N
Explanation:
Fr (retentive force : friction) divided by N (normal/perpendicular force) equals fr (friction)
a 1600 kg hippo is completely submerged, standing on the bottom of a lake. what is the approximate value of the upward normal force on the hippo?
The upward normal force on the hippo is equal to the buoyant force on it.
Buoyancy is the upward force exerted by a fluid on an object that is partially or entirely immersed in it. According to Archimedes' principle, this buoyant force is equal to the weight of the fluid displaced by the object. It's known that the weight of the hippo is 1600 kg. The density of water is 1000 kg/m³.
The volume of water displaced by the hippo equals the volume of the hippo submerged in water. The density of the hippo is approximately equal to the density of water, thus the volume of the hippo equals its mass divided by its density (ρ).
V = m/ρ
= 1600 kg/1000 kg/m³
= 1.6 m³
The weight of the water displaced by the hippo is equal to the weight of the hippo because the volume of water displaced by the hippo is equal to the volume of the hippo submerged in water. Therefore, the buoyant force on the hippo is 1600 kg.
The upward normal force on the hippo is the same as the buoyant force, which is 1600 kg.
Learn more about Buoyancy: https://brainly.com/question/30641396
#SPJ11
Water cement ratio and strength relationship is provided for two types of concrete mix design. Answer the following TWO questions based on this information. 60 8 50 40 28-day compressive strength, MPa 30 28-day compressive strength, 1000 psi 20 2 10 0 0.3 0 0.9 0.4 0.5 0.6 0.7 0.8 Water to cementitious materials ratio Question 17 5 pts An air entrained mix will be used in an environment exposed to freezing and thawing with moisture (F2). a Based on the use of same mix in a different environment, we know that water cementitious ratio of the mix was 0.5. What is your recommendation to start your trials for the mix in the given environment? Start with w/cm = 0.5 based on earlier experience Increase w/cm to 0.6 to increase air content Decrease w/cm to 0.4 to increase strength and satisfy w/cm criteria
Based on the information given, the recommended water cementitious ratio for an air entrained mix to be used in an environment exposed to freezing and thawing with moisture \((F_2)\) is to start with w/cm = 0.5 based on earlier experience.
The given table provides the relationship between water cement ratio and 28-day compressive strength for two types of concrete mix design. For an air entrained mix to be used in an environment exposed to freezing and thawing with moisture \((F_2)\), it is important to have a mix with adequate air content to resist damage from freeze-thaw cycles. Based on the information provided, the recommended water cementitious ratio to start the trials for the mix in the given environment is w/cm = 0.5 based on earlier experience. This is because a lower water cement ratio may result in a stronger mix but may not have enough air content to resist freeze-thaw cycles, while a higher water cement ratio may increase air content but may not satisfy the water cementitious ratio criteria. Therefore, starting with a water cementitious ratio of 0.5 based on earlier experience is a reasonable recommendation to ensure both adequate air content and strength in the mix.
To learn more about cementitious refer:
https://brainly.com/question/29566992
#SPJ11
13. A 1-m-diameter Pelton wheel rotates at 300 rpm. Which of the following heads (in meters) would be best suited for this turbine: (a) 2, (b) 5, (c) 40, (d) 70, or (e) 140? Explain.
The efficiency of the Pelton Wheel is maximum when the speed ratio is unity (u = 1) and the jet strikes the bucket at 180°, therefore the value of u and φ (angle between jet and tangent at the point of contact) are chosen as 1 and 180° respectively.
Now we can determine the power output of the turbine using the following equation:P = m × (V1 - V2) × gWhere,P = Power output of the Pelton Wheelm = Mass flow rate of waterV1 = Velocity of jetV2 = Velocity of leaving water streamg = Acceleration due to gravityTaking the absolute value of the head gives the velocity of the jet:V1 = √(2gh)Where,g = Acceleration due to gravityh = HeadThe velocity of the water leaving the bucket is given by:V2 = V1 - 2u × V1 = (1 - 2u) × V1P = m × V1 × (1 - 2u) × g.
Therefore the head required for 1-m-diameter Pelton Wheel rotating at 300 rpm is:(c) 40We can use the following equation for solving this question as described above:P = m × (V1 - V2) × gSince, u = 1V2 = (1 - 2u) × V1V2 = (1 - 2) × V1V2 = - V1Then,P = m × (V1 - (-V1)) × gP = m × (2V1) × gP = m × 2 × √(2gh) × gP = 2 × m × g × √(2gh)Therefore the power produced by the Pelton Wheel is directly proportional to the head of water supplied to it.
Therefore, the higher the head of water supplied to the Pelton Wheel, the higher will be the power output of the Pelton Wheel. From the above expression of power, we can see that the power of the Pelton Wheel depends on the value of √(2gh). This means that as the value of h increases, the power output of the Pelton Wheel increases. Therefore, the best-suited head for this turbine is the highest one from the given options, which is (c) 40.
To know more about speed visit:
https://brainly.com/question/17661499
#SPJ11
Conclusion for simple pendulum with aim to determine acceleration due to gravity
In conclusion, the experiment aimed to determine the acceleration due to gravity by measuring the period of a simple pendulum. The experiment was performed by measuring the length of the pendulum and recording the time for 10 oscillations. The data was then used to calculate the average period and subsequently, the acceleration due to gravity using the formula: g = (4π²L)/T².
Based on the results obtained, the acceleration due to gravity was found to be (9.79 ± 0.06) m/s², which is in good agreement with the accepted value of 9.81 m/s². The small discrepancy could be due to the experimental errors such as air resistance, friction and measurement errors.
Overall, the experiment was successful in determining the acceleration due to gravity using a simple pendulum and demonstrated the relationship between the period and the length of the pendulum.
what's is acceleration. ?????
Answer:
Acceleration, rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down. ... Acceleration is defined as the change in the velocity vector in a time interval, divided by the time interval.
Answer:
The rate of change in velocity with time A=finall velocity _intial velocity upon time
A truck driver is trying to push a loaded truck with an applied force.
Unfortunately, his attempt was unsuccessful the truck stays stationary no
matter how hard the driver pushes. How much work is done by the driver?
The work done by the driver pushing a stationary truck is zero, but the driver still expends energy to overcome the static friction between the truck and the ground.
The work done by the driver pushing a stationary truck with a constant force is zero. This is because work is defined as the product of force and displacement in the direction of force. In this case, the force applied by the driver is in the direction of motion, but since the truck doesn't move, the displacement is zero. Therefore, the work done by the driver is also zero.
However, it's worth noting that even though no work is done on the truck, the driver still expends energy. The energy expended by the driver goes into overcoming the static friction between the truck's wheels and the ground.
Static friction is the force that prevents the truck from moving, and it requires a certain amount of energy to overcome it. This energy is dissipated as heat and sound as the driver pushes against the truck.
To learn more about work done
https://brainly.com/question/31655489
#SPJ4
which field of science does gregor johann mendel related with ?
The field of science related to Gregor Mendel is genetics since he discovered fundamental laws in this discipline.
Who was Gregor Mendel?Gregor Mendel was a Hungarian botanist the experimented with pea plants and observed how traits are inherited across generations, which led him to develop a series of genetic rules that can be used in virtually all organisms such as the principle of independent segregation or the principle of dominance in dominant traits.
Therefore, with this data, we can see that Gregor Mendel developed important experiments in genetics and discovered the basis of this field.
Learn more about Gregor Mendel here:
https://brainly.com/question/994906
#SPJ1
What kind of strip is Dr. Hewitt holding in his hand?
What happens when Dr. Hewitt heats up the strip?
Why does the strip behave as it does when Dr. Hewitt heats it up?
(a) a strip welded together from brass on one side and steel on the other Stripe made of two metals.
(b) It flexes.
(c) These metals expand in different ways.
A bimetallic strip is made up of two distinct metals that have been welded together. Different metals expand at various rates when heated. It bends as a result of heat expansion. Thermal expansion refers to the tendency of matter to alter form, area, and volume in reaction to temperature changes.
Because the water vapor flowing out of the nozzle has expanded and cooled, he may hold his palm a few inches above the nozzle.
Learn more about bimetallic strip from here;
https://brainly.com/question/15592941
#SPJ4
If an electron is lost or gained, we no longer call it an atom. What is the name when this happens?