A 3-kg block sits at the top of a 3-m tall smooth ramp. The ramp is 5 meters long. The block slides down the ramp. What is its velocity at the bottom of the ramp
Answers
mgh=1/2mv²
gh=1/2v²
v²=2gh
v=√2gh
v=√2 x 10 x 3
v=√60
Related Questions
A soccer player kicks a ball, applying a force of 1,000 newtons over a distance of 0. 2 meter. The ball travels 50 meters down the field before another player stops the ball. How much work was done during the kick?.
Answers
In an experiment, the factor that changes as a result of what happens
during the experiment (and the scientist measures) is called the __.
Answers
Answer:
The dependent variable
Explanation:
This is because this variable depends on what happens during the experiment.
True or False
1)All forces cause a change in an object’s speed and direction.
Answers
Answer:
True
Explanation:
Answer and Explanation:
True I believe bc if you put a certain amount of force on an object it'll move and depending on where you place the force on the object it'll move in that direction. How much force and how much weight the object has will determine the speed...
[PLEASE ANSWER WITH 6TH GRAMMAR) Although people usually only hear about the benefits of exercise, there can be risk factors as well. Some of these risks are inherent in different types of exercises or sports, but other risks can be associated with the environment where someone chooses to exercise. What are some environmental risk factors that should be considered and avoided when exercising?
Answers
Answer:
heat, light, pollution, hypoxia
Explanation:
Answer:
I'm in 8th grade but oh whatever
Explanation:
Some Enviromental risk factors that should be avoided when exercising would be Dehydration. Dehydration would be considered a risk because if you're exercising nonstop outside in the heat and not drinking plenty of water, there could be serious health issues such as your blood volume going down. Another risk factor would be a heat stroke. A heat stroke is when your body temperature is over the original temperature. So, if you exercise long enough outside, then your body temperature will increase causing a heat stroke. Therefore, you should manage how long you exercise outside.
1) what is the power output in watts of an incandescent light bulb which puts out 100 joules of energy every 1 second
2) why does a 100 watt light bulb look brighter than a 60 watt light bulb ?
Answers
1. The power output in watts of an incandescent light bulb can be calculated by dividing the energy output (in joules) by the time interval (in seconds) during which the energy is produced.
In this case, the light bulb is producing 100 J of energy every 1 second, so the power output can be calculated as:
Power output (P) = Energy output (E) / Time interval (t) = 100 J / 1 second = 100 Watts
2. A 100-watt light bulb looks brighter than a 60-watt light bulb because it produces more energy and therefore emits more light. The brightness of a light bulb is directly proportional to the energy it produces.
A 100-watt light bulb produces more energy (and therefore light) than a 60-watt light bulb, so it appears brighter.
However, it is important to note that the perceived brightness of a light bulb can also be affected by other factors such as the color temperature of the light, the size of the bulb, and the reflectiveness of the surrounding area.
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what is physical fitness? 1) the improvement of the body through inteninoal movement 2) the speed at which the body moves during exersize 3) the ability of the body to function of the body to function efficiently during exercise D) the preformence of mucles for long periods of time
Answers
Answer:
D) the preformence of mucles for long periods of time
A golf ball thrown on the floor rebounds with a speed less than the initial speed.
Please help; Q's A,B and C.
Answers
The magnitude of the ball's change in velocity is 2 m/s. The direction of the change in velocity is downwards.
What is magnitude ?In physics, magnitude is a measure of the size or intensity of a physical quantity, such as length, mass, temperature, pressure, or energy. Magnitude is often expressed as a numerical value, and is usually related to the physical property being measured. For example, the magnitude of a length measurement is the length itself, while the magnitude of a temperature measurement is the temperature reading. Magnitude is also used to describe the size of a star or other astronomical object, such as a planet. It is typically expressed as a number on a logarithmic scale, where a lower number indicates a brighter object and a higher number indicates a dimmer object.
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all the jovian planets lie beyond the asteroid belt.
Answers
Yes, all the jovian planets (also known as gas giants) lie beyond the asteroid belt in our solar system.
The jovian planets include Jupiter, Saturn, Uranus, and Neptune. They are characterized by their large size, primarily composed of hydrogen and helium, and lack of a solid surface.
These planets are located in the outer region of the solar system, beyond the asteroid belt, which is situated between the orbits of Mars and Jupiter.
The asteroid belt is a region of space that contains numerous small rocky bodies called asteroids. It is located primarily between the orbits of Mars and Jupiter.
The jovian planets are located farther out from the Sun and are separated from the inner rocky planets (Mercury, Venus, Earth, and Mars) by this asteroid belt.
Therefore, it is correct to state that all the jovian planets lie beyond the asteroid belt.
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Two +1 C charges are separated by 3000 m. What is the magnitude of the electric force
Answers
¡Hello!
Topic: Electrostatic
For calculate electric force, we can apllicate formula:
\(\boxed{\boxed{\bold{F = k * \frac{q*q'}{r^{2} } } } }\)
\(\sqrt{\) F = Electric Force
\(\sqrt{\) k = Coulomb Constant = 9x10^9
\(\sqrt{\) q = Charges = 1 C
\(\sqrt{\) r = Distance = 3000 m
Let's replace according the information, and let's resolve it:
F = 9x10^9 * (1 * 1) / 3000²
F = 9x10^9 * 1 / 9000000
F = 9x10^9 * 1.1111111e-7
F = 1000 N
Result:
The electric force is of 1000 N
Good luck
during which lunar phase does every solar eclipse occur?
Answers
Answer:
It has to be the "New Moon" because that is when the moon is between the sun and the earth.
A lunar eclipse can occur when the earth is between the sun and the moon.
A wombat runs south in a straight line with an average velocity of 5 m/s for 4
minutes and then with an average velocity of 4 m/s for 3 minutes in the same
direction.
What is the wombats total displacement?
What is the average velocity during that time?
Answers
We have that
The wombats total displacement is
\(d_t=2100m\)
The average velocity during that time is
\(v_{avg}=5m/s\)
From the question we are told that:
initial Velocity \(V_1=5m/s\)
initial Time \(T_1=4min=>240sec\)
Final Velocity \(V_2=4m/s\)
Final time \(T_2=3min=>180sec\)
a)
Generally, the equation for displacement is mathematically given by
d_t=(Initial +final) displacement
Where
initial displacement
\(d_1=V_1*t_1\\\\d_1=5*240\)
\(d_1=1200m\)
Final displacement
\(d_2=V_2*t_2\\\\d_2=5*180\)
\(d_2=900m\)
Therefore
\(d_t=(Initial +final) displacement\)
\(d_t=1200+900\)
\(d_t=2100m\)
b)
Generally, the equation for Average velocity is mathematically given by
\(v_{avg}=\frac{d_t}{t_1+t_2}\)
\(v_{avg}=\frac{2100m}{240+180}\)
\(v_{avg}=5m/s\)
in conclusion
The wombats total displacement is
\(d_t=2100m\)
The average velocity during that time is
\(v_{avg}=5m/s\)
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Examine the charge distribution shown a) What will the net force be on a third charge of q3 = -5.0x10-5C , placed at point Z? b) What will the total electric potential energy be if a third charge of q3 = -5.0x10-5C is placed at point Z?
Answers
Part A. We are asked to determine the force exerted on a charge placed on point Z. To do that we will use the fact that charges with the same sign will attract each other and charges with a different sign will repel each other. Therefore, we can construct the following free body diagram:
Since q3 and q2 are both negative they repel each other and since q1 is positive this means that q3 and q1 will attract each other.
To determine the magnitude of the forces we will use Coulomb's law:
\(F=k\frac{q_1q_2}{r^2}\)Where:
\(\begin{gathered} k=\text{ Coulomb's constant} \\ r=\text{ distance between the charges} \\ q_1,q_2=\text{ magnitude of the charges} \end{gathered}\)For the force between q1 and q3 we have:
\(F_1=k\frac{q_1q_3}{r_1^2}\)For the force between q3 and q2 we have:
\(F_2=k\frac{q_2q_3}{r_2^2}\)Now, the net force is the difference between F2 and F1 since the force act in different directions, therefore, we have:
\(F=F_2-F_1\)we have taken the left direction to be negative and the right direction to be positive. Now, we substitute Coulomb's law:
\(F=k\frac{q_2q_3}{r_2^2}-k\frac{q_1q_3}{r_1^2}\)We can take "kq3" as a common factor:
\(F=kq_3(\frac{q_2}{r_2^2}-\frac{q_1}{r_1^2})\)The distance from q1 to q3 is:
\(r_1=4m+3m=7m\)The distance from q2 and q3 is:
\(r_2=3m\)Now, we substitute the values:
\(F=(9\times10^9\frac{Nm^2}{C^2})(5\times10^{-5}C)(\frac{4\times10^{-5}C}{(3m)^2}-\frac{4\times10^{-5}C}{(7m)^2})\)Solving the operations:
Solving the operations:
\(F=1.63N\)Therefore, the net force is 1.63 Newtons to the right.
Part B. To calculate the electric potential energy we will use the following formula:
\(U=k\frac{q_1q_2}{r}\)To determine the total energy we add the energy for both pairs of charges, like this:
\(U=k\frac{q_1q_3}{r_1}+k\frac{q_2q_3}{r_2}\)We can take "kq3" as a common factor:
\(U=kq_3(\frac{q_1}{r_1}+\frac{q_2}{r_2})\)Now, we substitute the values:
\(U=(9\times10^9\frac{Nm^2}{C^2})(-5\times10^{-5}C)(\frac{4\times10^{-5}C}{7m}+\frac{-4\times10^{-5}C}{3m})\)Solving the operations we get
\(U=3.42J\)Therefore, the energy is 3.42 Joules.
What is the speed of the 0.100 kgkg sphere when it has moved 0.400 mm to the right from its initial position
Answers
Answer:The question does not provide enough information to determine the speed of the sphere. To calculate the speed, we would need to know either the time it took for the sphere to move 0.400 mm, or the acceleration of the sphere.
Explanation:We need more information to answer the question correctly
To calculate the speed of the 0.100 kg sphere, we need to use the formula for speed, which is speed = distance / time. We are given that the sphere has moved 0.400 mm to the right from its initial position.
To calculate the speed of the 0.100 kg sphere after it has moved 0.400 mm to the right from its initial position, we need more information such as the force acting on the sphere or the time taken to move that distance.
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Now let's apply this to Trial 2. In this instance, Hailey (who is on the cart with Christine) has a mass of 69 kg. Conner is on the other cart.
1. Determine Conner's mass. Describe your process and results below.______
Answers
Here, Conner's mass is represented by m2.u2 is the velocity of Conner before the collision. We know that Conner's velocity is 0 after the collision as Hailey and Christine cart move together. So the final velocity, v1 and v2 will be 0 after the collision. Therefore, Conner's mass is 61 kg.
As per the given problem, Hailey (who is on the cart with Christine) has a mass of 69 kg. Conner is on the other cart. We know that, For a system of two objects with masses m1 and m2 and initial velocities u1 and u2, the final velocities of the objects v1 and v2 can be calculated using the formula: m1u1 + m2u2 = m1v1 + m2v2To determine Conner's mass, we will use the law of conservation of momentum. The total momentum of a system before a collision is equal to the total momentum of the system after the collision. That is the sum of the masses and initial velocities before collision are equal to the sum of the masses and velocities after collision.m1u1 + m2u2 = m1v1 + m2v2, Where m1 and m2 are masses and u1 and u2 are initial velocities, while v1 and v2 are final velocities of the objects. Consider the velocity of Hailey, who is on the cart with Christine, to be 0.Initial momentum = m1u1 + m2u2 = m2u2.
Therefore, m1u1 + m2u2 = m1v1 + m2v2 becomes m2u2 = m1v1 + m2v2. Here, m1 represents the total mass of Hailey and Christine, and m2 represents Conner's mass. Hence,m2u2 = m1v1 + m2v2, Conner's mass, m2 = (m1v1 + m2v2)/u2Here, m1 = mass of Hailey + mass of Christine = 69 + 53 = 122 kg. After the collision, Hailey and Christine move together. Hence, their final velocity, v1 = 3.8 m/s. Conner and his cart are at rest. Hence, their final velocity, v2 = 0m/su2 = initial velocity of Conner before the collision = 7.6 m/s. Now, we can determine Conner's mass using the above formula.m2 = (m1v1 + m2v2)/u2 = (122*3.8 + m2*0)/7.6 = 0.5*122m2 = 61 kg.
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Answer it fast and no spamming....! !
Example 1: Three resisters 10 12,20 ,30 12 ohms, are connected in
(a) Series (b) Parallel. Find the resultant resistance in the circuit.
answer correctly!✌️
Answers
Answer:
When the resistances are connected in the parallel the equivalent resistance will be always less than the value of the lowest resistance in the parallel circuit.
The equivalent resistance in the parallel circuit can be calculated using the following formula.
1/R=1/R1+1/R2+1/R3
1/R= 1/10+1/20+1/30
1/R=(6+3+2)/60
1/R=11/60
R=60/11
R=5.45 Ohms
Based on what you know about observations of the interstellar medium at wavelengths other than for visible light, select all of the correct statements from the following list.
-The 21-cm radio observations are of neutral hydrogen.
-Much interstellar dust between stars is not visible.
-The source of hot gas observed at X-ray wavelengths is not known.
-All interstellar material is cool.
-Interstellar dust is observed at ultraviolet wavelengths.
-Giant molecular clouds consist mostly of CO molecules.
-Material observed at wavelengths longer than that of visible light is usually cool.
Answers
The correct statements are:
-The 21-cm radio observations are of neutral hydrogen.-Much interstellar dust between stars is not visible.-The source of hot gas observed at X-ray wavelengths is not known.-All interstellar material is cool.7.-Material observed at wavelengths longer than that of visible light is usually cool.
The 21-cm radio observations are of neutral hydrogen: This is correct. The 21-cm line is produced by the spin-flip transition of neutral hydrogen atoms, and is an important tool for studying the distribution and dynamics of neutral hydrogen in the interstellar medium.
Much interstellar dust between stars is not visible: This is correct. Interstellar dust can obscure visible light from background sources, but it can also absorb and scatter radiation at longer wavelengths. Infrared and submillimeter observations can reveal the presence of dust that is not visible in visible light.
The source of hot gas observed at X-ray wavelengths is not known: This is correct. X-ray observations of the interstellar medium reveal the presence of hot, ionized gas, but the origin of this gas is not fully understood.
Interstellar dust is observed at ultraviolet wavelengths: This is incorrect. Interstellar dust is typically observed at longer wavelengths, such as infrared and submillimeter, where it emits thermal radiation.
Giant molecular clouds consist mostly of CO molecules: This is partially correct. Giant molecular clouds are primarily composed of molecular hydrogen, but because H2 is difficult to detect directly, astronomers often use the more easily observable CO molecule as a tracer.
Material observed at wavelengths longer than that of visible light is usually cool: This is correct. Objects that emit primarily at longer wavelengths, such as interstellar dust and molecular gas, are typically at cooler temperatures than objects that emit primarily at shorter wavelengths, such as hot, ionized gas.
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1. Two long, parallel wires separated by 1.25 cm carry electric currents that flow in opposite directions. The current in one wire is 0.530 A, and the current in the other is 1.17 A. Find the magnitude of the force per unit length that one wire exerts on the other. (N/m)
2. A tightly wound solenoid that consists of 200 turns of wire has a length of 0.100 m long. Find the magnitude of the magnetic field inside the solenoid when it carries an electric current of 2.00 A.
The magnitude of the magnetic field inside the solenoid is?
Answers
The magnitude of the force per unit length that one wire exerts on the other is 0.945 N/m.
This is calculated using the equation F = μ0I1I2/2πd, where μ0 is the permeability of free space, I¹ and I² are the two currents, and d is the distance between the wires. In this case, μ0 = 4π x 10⁻⁷ N/A², I¹ = 0.530 A, I² = 1.17 A, and d = 1.25 cm.
The magnitude of the magnetic field inside the solenoid is 0.837 T (Tesla). This is calculated using the equation B = μ0NI/L, where μ0 is the permeability of free space, N is the number of turns, I is the current, and L is the length of the solenoid.
In this case, μ0 = 4π x 10⁻⁷ N/A², N = 200 turns, I = 2.00 A, and L = 0.100 m. This magnetic field is generated by the electric current flowing through the solenoid, and it is strongest at the center of the solenoid and gets weaker as one moves away from the center.
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What causes air to move or circulate from one place to another?.
Answers
Air moves or circulates from one place to another due to differences in air pressure caused by differences in temperature and the Earth's rotation.
Air moves due to differences in air pressure caused by differences in temperature and the Earth's rotation. As the Earth spins, the air is heated and cooled at different rates in different regions. This causes variations in air pressure. Air always flows from areas of high pressure to areas of low pressure, creating wind. Uneven heating of the Earth's surface also causes convection currents to form.
As air warms, it becomes less dense and rises, while cooler, denser air sinks. This creates a circular flow of air. Wind can also be influenced by other factors such as the geography of an area, the presence of water, and the rotation of storms. Overall, differences in temperature and air pressure, and the Earth's rotation are the primary causes of air movement and circulation.
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The leaves of plants contain specialized parts that absorb energy from sunlight. Which feature would help a plant better compete for sunlight?
leaves that change color
colorful flowers
larger overall leaf size
a shorter stem
Answers
Answer:
In most plants, the leaves are the main food factories. They capture the sun's energy with the help of chlorophyll in the leaf cells. The chlorophyll traps and packages the energy from the light of the sun in a process called photosynthesis. Leaves usually have a large surface so they can collect the most sunlight.
Explanation:
Hope this helps...maybe
Answer:
C
Explanation:
A uniform steel girder of weight 22KN and of length 12m is lifted off the ground at one end by means of a crane. When the raised end is 2.0m above the ground, the cable is vertical.
A. Sketch a free-body diagram of the girder in this position
b. Calculate the tension in the cable at this position and the force of the girder on the ground
Answers
Answer:
Explanation:
For free body diagram see attached sheet .
W is weight of steel girder acting at the middle point of its length . T is tension in the cable .
OB = √ ( 12² - 2² )
= 11.83 m .
OC = 11.83 / 2 = 5.915 m
Taking moment of tension T and weight W about point O
W x OC = T x OB
22 x 5.915 = T x 11.83
T = 22 x 5.915 / 11.83
= 11 kN
Considering forces acting in vertical direction and equating forces in opposite direction
T + R = W
R = W - T
= 22 - 11 = 11 KN
So force of grinder on the ground = R
= 11 KN.
The total amount of carbon dioxide in the atmosphere is estimated to have decreased by 10 to 15 percent since 1900.
True False
Answers
Answer: False
Explanation:
I NEED HELPP!!!
Calculating the Value of an Unknown Resistor
Answers
Bx = -1.33 m and By = 2.81 m
Find the magnitude of the
vector.
Answers
Answer:
Explanation:
The formula for the magnitude of a vector is
\(B_{mag}=\sqrt{(-1.33)^2+(2.81)^2}\) and then round to the hundredths place:
3.11 m. Since we are in Q2, we can also find the direction of this vector:
\(tan^{-1}(\frac{2.81}{-1.33})=-64.7\) but since we are in Q2, we add 180 degrees to the result, getting the angle to be 115.3
Answer:115.33
Explanation:
An apple is released from rest 500 m above the ground. Due to the combined forces of air resistance and gravity, it has a speed of 40 m s when it reaches the ground. What percentage of the initial mechanical energy of the apple-earth system was dissipated due to air resistance? take the potential energy of the apple-earth system to be zero when the apple reaches the ground.
Answers
The percentage of the initial mechanical energy of the apple-earth system that was dissipated is : 84%
Determine the percentage of the initial mechanical energy dissipatedGiven that
Potential energy = mgh = 0
= m* 9.81 * 500 = 0
= 4905 m J
Kinetic energy ( K ) = 1/2 mv²
= 1/2 * m * 40²
= 800 m
Next step : calculate the dissipated energy
dissipated energy = Potential energy - kinetic energy
= 4905 m - 800 m
= 4105 m
Final step : determine the percentage of the dissipated energy
= dissipated energy / potential energy
= 4105 m / 4905 m
= 84%
Hence we can conclude that The percentage of the initial mechanical energy of the apple-earth system that was dissipated is : 84%
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Dylan is set to receive a football kickoff. After being kicked, the ball goes up to a height of 55m before starting back down. How much time does he have before the ball comes back down?
Answers
Answer:
Explanation:
Answer:
There was no anwser
Explanation:
because dylan did not anwser
the total amount of power that a star radiates is called its
Answers
Assume that the pendulum clock shown is a closed system. Which statement describes evidence that the pendulum energy is conserved even as it eventually stops moving? A. Energy must be added to the pendulum to keep it from slowing down. B. Some of the clocks matter is transformed into new energy. C. all it’s mechanical energy is transformed into other forms of energy.
Answers
Answer:
The correct option is;
C. All its mechanical energy is transformed into other forms of energy
Explanation:
The given parameters are;
The nature of the system of the pendulum clock = Closed system
Present condition of the pendulum = Motionless
Initial condition = Moving
The principle of conservation of energy states that the sum of energy present in a closed system is always constant, as such, energy can neither be destroyed or created
Therefore, all the initial energy of motion of the pendulum which is known as mechanical energy, consisting of both potential and kinetic energy which resulted in the clock operation when the pendulum was in motion, has been transformed into other forms of energy which is shown by the at rest position having no motion, hence to kinetic energy, and no relative height to its location at rest, therefore, no relative potential energy.
Therefore, because the initial mechanical energy is now 0, going by the principle of energy conservation, all the mechanical has been transformed into other forms energy.
Answer:
C
Explanation:
I got it right
A plastic rod becomes negatively charged when it is rubbed with a piece of wool. How does the rod become charged?
Electrons move from the rod to the wool.
Protons move from the rod to the wool.
Electrons move from the wool to the rod.
Protons move from the wool to the rod.
Answers
Electrons move from the wool to the rod.
BEcause if they move from wool to rod, the rod has more number of electrons now. Hence making it negatively charged
The plastic rod becomes charged when electrons move from the wool to the rod to become negatively charged. Details about charge can be found below.
What is electronegativity?Electronegativity is the tendency, or a measure of the ability, of an atom or molecule to attract electrons and thus form bonds.
According to this question, a plastic rod becomes negatively charged when it is rubbed with a piece of wool.
An atom becomes negatively charged when it gains electrons from another atom, hence, it can be said that the plastic rod becomes charged when electrons move from the wool to the rod to become negatively charged.
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Calculate the momentum of Jason travelling in a
car that weighs 360 kg at a velocity of 45 km/hr.
Answers
Answer:
I think 16,200
Explanation:
P=mv
m=360
v=45
P=360*45
P=16,200
Who Designed the one-piece wrought iron plow.
Answers
Answer:
Jethro Wood is the one who designed the one-piece wrought iron plow.