Answers
\(V(bar)=46.33(km/hr).\)
Explanation:Let's refer to the formula of average velocity.
Formula: \(V(bar)=\frac{td}{ct}\), where td is the todal displacement, and ct is the change in time.
Since we're trying to find out the average velocity of the whole event (from time 0 when the car started moving to time 30 minutes when it finished the trip), we must take 30 minutes as our change in time.
Now, we need to find the distance traveled by the car on each instance of speed:
1. Distance covered with speed 1.
To find the covered distance, use the following formula.
\(d=vt\), where "v" is velocity, and "t" is time.
Note. When using this type of formulas, all variables must match units. For example, say that your velocty is on km/hr, this means that the time or distance you input or calculate is going to be on kilometers or hours.
Find the value.
\(d=(61(km/h))(10(min))\\ \\d=610 (km).\)
2. Distance covered with speed 2.\(d=(39(km/h))(20(min))\\ \\d=780 (km).\)
3. Find average velocity through the given formula.Note. We add up both calculated distances to find the total displacement of the car.
\(V(bar)=\frac{td}{ct}\\ \\V(bar)=\frac{610(km)+780(km)}{30(min)}\\ \\V(bar)=46.33(km/hr).\)
The average velocity of the car in Km/h during the trip is 98.37 Km/h
What is velocity?Velocity is simply defined as the rate of change of displacement with time. Mathematically, it can be expressed as:
Velocity = displacement / time
What is average velocity?This is the total displacement travelled divided by the total time taken to cover the displacement. Mathematically, it can be expressed as:
Average velocity = Total displacement / total time
How to determine the displacement travelled in the first 10 minsVelocity = 61 Km/hTime = 10 mins = 10 / 60 = 0.167 h displacement =?Displacement = velocity × time
Displacement = 61 × 0.167
Displacement = 10.187 Km
How to determine the average velocity Total displacement = 10.187 + 39 = 49.187 KmTotal time = 10 + 20 = 30 mins = 30 / 60 = 0.5 hAverage velocity =?Average velocity = Total displacement / total time
Average velocity = 49.187 / 0.5
Average velocity = 98.37 Km/h
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Related Questions
In a local park, a pine cone falls off a tree branch (starting at rest) and falls to the ground. We will model the pine cone hitting the ground as if it is a mass going onto a spring (with the ground being a spring). The pine cone has a mass of 0.116 kg, and starts at a height of 7.90 m above the ground. The pine cone compresses the spring (ground) by 0.0148 m, briefly coming to rest at the bottom of its motion. (It then bounces, which is not part of the time period that we'll cover in this problem.) Assume that the pine cone, the Earth and the spring (ground) are a system, and that no net work is done by external forces to the system or by non-conservative forces. Note: these are the assumptions necessary to assume that mechanical energy is conserved. Label the initial time point as the start of the pine cone's drop, and the final time point as the moment when the pine cone is at rest with the spring as compressed as it will get.
1. What is the change in gravitational potential energy from the initial time point to the final time point? Hint: don't forget that the pine cone actually goes slightly below the height of most of the ground. Joules
2. What is the spring constant of the spring? N/m
3. Now, let's look at the time point when the pine cone is 4.24 meters above the ground. You can do this by assuming that this new time point becomes the final time point, and the spring is no longer in the problem. What is the magnitude of the pine cone's velocity at this time point? m/s
Answers
Answer:
1)) ΔU = -8.96 J, 2) k = 8.18 10⁴ N / m, 3) v = 8.47 m / s
Explanation:
For this exercise we will use conservation of energy.
Starting point. Point where the pineapple comes out
Em₀ = U = m g h
where the reference frame is placed on the ground
Final point. Point where pineapple stops
Em_f = K_e + U = ½ k y² + m g y
1) the change in gravitational potential energy is
ΔU = U_f - U₀
ΔU = m g y - m g h
ΔU = mg (y-h)
let's calculate
ΔU = 0.116 9.8 (0.0148 - 7.9)
ΔU = -8.96 J
The negative sign indicates that the energy decreases
2) let's use energy conservation
Em₀ = Em_f
mg h = ½ k y² + mg y
k = mg (h-y) \(\frac{2}{y^2}\)
let's calculate
k = 0.116 9.8 (7.9 - 0.0148) \(\frac{2}{0.0148^2}\)
k = 8.18 10⁴ N / m
3) we use the same starting point and as the end point we use this height (y₂ = 4.24 m)
Em_{f2} = K + U = ½ m v² + mg y₂
energy is conserved
Em₀ = Em_{f2}
mgh = ½ m v² + m g y₂
v =\(\sqrt{ 2g(h-y_2)}\)
let's calculate
v = \(\sqrt{ 2 \ 9.8 \ (7.9-4.24)}\)
v = 8.47 m / s
Find the vector whose magnitude is 5 and which is in the direction of the vector 4i -3j +k
Answers
The vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.
To solve this problemThe given vector can be normalized before being multiplied by the desired magnitude. This is how to locate the vector:
The vector that has been provided should be normalized by dividing each of its components by its magnitude. The Pythagorean theorem can be used to determine the magnitude of the vector 4i - 3j + k:
Magnitude = √(4² + (-3)² + 1²) = √(16 + 9 + 1) = √26
Normalize the vector by dividing each component by the magnitude:
Normalized vector = (4/√26)i + (-3/√26)j + (1/√26)k
Multiply the normalized vector by the desired magnitude:
To obtain a vector with a magnitude of 5, multiply each component of the normalized vector by 5:
Desired vector = 5 * ((4/√26)i + (-3/√26)j + (1/√26)k)
Simplifying the expression gives:
Desired vector ≈ (20/√26)i + (-15/√26)j + (5/√26)k
So, the vector with a magnitude of 5 and in the direction of the vector 4i - 3j + k is approximately (20/√26)i + (-15/√26)j + (5/√26)k.
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Which type of marco molecules help a cell break down food?
Answers
Answer: Each macromolecule is broken down by a specific enzyme. For instance, carbohydrates are broken down by amylase, sucrase, lactase, or maltase. Proteins are broken down by the enzymes pepsin and peptidase, and by hydrochloric acid. Lipids are broken down by lipases.
Explanation:
Hope this will help
Light travels fast and in a _______________.
straight line
compression wave
wavy line
blue line
{its for my sis shes stu!pd}
Answers
Answer:
Straight Line
Light travels in straight lines called rays. Light travels "at the speed of light." This speed is about 186,000 miles per second (670 million miles per hour), or about 300,000 kilometers per second.
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Which statement describes a primary difference between an electromagnetic wave and a mechanical wave
Answers
The primary difference is that electromagnetic waves can propagate through a vacuum or empty space, while mechanical waves require a physical medium to transmit energy.
Difference between an Electromagnet and Mechanical WaveA primary difference between an electromagnetic wave and a mechanical wave is the medium through which they propagate.
Electromagnetic waves can propagate through a vacuum or empty space without requiring a material medium. They are generated by the oscillation and interaction of electric and magnetic fields.
Examples of electromagnetic waves include radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. These waves can travel through space, air, or other materials, as they do not rely on physical particles to transmit energy.
On the other hand, mechanical waves require a physical medium to propagate. They are disturbances that travel through a material medium, transferring energy from one location to another. Mechanical waves rely on the interaction and displacement of particles within the medium to transmit energy.
Examples of mechanical waves include sound waves, water waves, seismic waves, and waves on a string. These waves cannot travel through a vacuum as they depend on the physical presence and interaction of particles within the medium.
In summary, the primary difference is that electromagnetic waves can propagate through a vacuum or empty space, while mechanical waves require a physical medium to transmit energy.
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Which characteristics describe a point charge
Answers
Answer:
Explanation:
It takes up no space and acts uniformly on its surroundings.
Given a point charge, or a particle of infinitesimal size, that contains a certain charge, electric field lines emanate from equally in all radial directions. If the point charge is positive, field lines point away from it; if the charge is negative, field lines point toward it.
is it better to walk or run in the rain?
Answers
Answer:
Not gonna lie. I actually had to think about this a lot XD
Running in the rain can cause you to slip and get hurt. Which I think isn't what you would want.
Walking in the rain (although it is sad), is actually a better idea than running.
Hope this helps!
Answer:
Walk
Explanation:
Running might stop you from being outside for as long, but running on wet ground will most likely result in a not-so-graceful faceplant.
What wave characteristic of stage 1 sleep
Answers
Search Results
Featured snippet from the web
In terms of brain wave activity, stage 1 sleep is associated with both alpha and theta waves. The early portion of stage 1 sleep produces alpha waves, which are relatively low frequency
If mass is measured in kg and acceleration is measured in m/s^2, what units would force be measured in? This unit is also know as a newton (N).
Answers
Using Newtons second law
\(\\ \sf\longmapsto Force=Mass\times Acceleration\)
\(\\ \sf\longmapsto Force=kgm/s^2\)
\(\\ \sf\longmapsto Force=Newton(N)\)
PLEASE HELP AND SHOW WORK,THANK YOU!!
4) Suppose that two identical
mass planets are sitting
million miles apart. At that
distance the planets have a
gravitational force of 1,000,000 N.
If the planets are moved
to two million miles apart, what
is the new gravitational force
between them?
Answers
The new gravitational force between the two planets, when they are moved to two million miles apart, is 250,000 N
The gravitational force between two objects can be calculated using Newton's Law of Universal Gravitation, which states that the force is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Given:
Initial distance between the planets = 1 million miles
Initial gravitational force = 1,000,000 N
Final distance between the planets = 2 million miles
To determine the new gravitational force, we need to compare the ratios of the distances and apply the inverse square law.
Let's denote the initial distance as d1, the initial gravitational force as F1, the final distance as d2, and the unknown final gravitational force as F2.
According to the inverse square law, the ratio of the gravitational forces is the square of the ratio of the distances:
(F2/F1) = (d1/d2)²
Substituting the given values:
(F2/1,000,000 N) = (1 million miles / 2 million miles)²
Simplifying:
(F2/1,000,000 N) = (1/2)²
(F2/1,000,000 N) = 1/4
F2 = (1/4) * 1,000,000 N
F2 = 250,000 N
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answer the questions shown in the Fig below.
Answers
The change in internal energy, ΔE(AB) is 7.14 kJ.
Since, the ideal gas goes through a cycle of processes, the total change in internal energy will be zero.
ΔE = ΔE(AB) + ΔE(BC) + ΔE(CD) + ΔE(DA) = 0
So,
ΔE(AB) = -ΔE(BC) - ΔE(CD) - ΔE(DA)
We know that the process CD s an isothermal process.
So, the change in internal energy, ΔE(CD) = 0
According to the first law of thermodynamics,
ΔE = Q + W
Therefore, the change in internal energy,
ΔE(AB) = -[Q(BC) + W(BC)] - [Q(DA) + W(DA)]
ΔE(AB) = -[Q(BC) + P(B)ΔV(BC)] - [Q(DA) - P(D)ΔV(DA)]
ΔE(AB) = -(100 + 0.31 x3) - (-150 - 1 x -1)
ΔE(AB) = -100 - 0.93 + 150 + 1
ΔE(AB) = 50 + (0.07 x 1.013 x 10⁵)
ΔE(AB) = 50 + 7091
ΔE(AB) = 7.14 kJ
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Solve this equasion from The Doubling Theory
Answers
the equation is hard and for this equation to be solved download e book
The Doubling Theory is a mathematical concept that involves finding a number that, when doubled repeatedly, equals a given value. To solve an equation using the Doubling Theory, you need to determine the number of doublings required to reach the given value.
Explanation:The Doubling Theory is a mathematical concept that involves finding a number that, when doubled repeatedly, equals a given value. To solve an equation using the Doubling Theory, you need to determine the number of doublings required to reach the given value. Let's say the equation is 2^n = 64. We can start with 2 and double it repeatedly until we reach 64:
2 x 2 = 44 x 2 = 88 x 2 = 1616 x 2 = 3232 x 2 = 64It took 5 doublings to reach 64, so the value of n in the equation 2^n = 64 is 5.
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Does anybody know how to solve this? Thanks!!
The position x of a bowling ball rolling on a smooth floor as a function of time t is given by: x(t)=v0t+x0 , where v0=2.5m/s and x0=−5.0m . The polynomial relationship between position and time for the bowling ball is _______________.
exponential
inverse
linear
cubic
quadratic
Answers
The polynomial relationship between position and time for the bowling ball is linear.
What is a linear relationship between two variables?A linear relationship between two variables is a term used to describe a straight-line relationship between the two variables.
Linear relationships can be expressed either in a graphical format or as a mathematical equation of the form y = mx + b.
From the equation of linear relationship between two variable, the highest power of x is one.
The given equation for position and time;
x(t) = vot + xo
From this given equation, the highest power of t is one, hence it is called linear relationship.
Thus, the polynomial relationship between position and time for the bowling ball is linear.
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How would the calculation change if a typical comet in the Oort cloud is only 1 km in diameter?
Answers
When a typical comet in the Oort cloud is only 1 km in diameter, then the mass of the Oort cloud is changes to 4.18×10⁹ kg.
The mass of each comet int he Oort cloud is,
mass = density × Volume
volume of sphere = 4/3(π×r²) where, r = radius of the sphere
From the given,
diameter = 1 km
radius = Diameter / 2 = 1/2(D)
Volume of the comet = 4/3 (π×r²) = 4/3 (π× (1/2 (10)³)²)
= 4/3×(π) ×(1/8×10⁶)
Mass = density × volume, where density = 1000 kg/m³
= 1000 × 4/3×(π) ×(1/8×10⁶)
= 4.18 ×10⁹ kg
When the typical comet in the Oort cloud is only 12 km in diameter the mass of Oort cloud is 4.18×10⁹ kg.
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A plank AB 3m long weighing 20kg and with center of gravity 2m from the end A carries a load of mass 10kg at the end A it rests on two supports CandD.
1, compute the values of the reaction forces R1 and R2 at C and D.
2, how far from D and on which side of it must a mass of 24kg be placed on the plank so as to make the reactions equal? What are their values.
3,without this 24kg what vertical force applied at B will just lift the plank clear of D? What is then the reaction at C.
Answers
The answers are 1) The value of R2 is not relevant as it implies a downward force on the plank, 2) The reactions at C and D are 66.3 N and 90 N, respectively, and 3) The vertical force at B to lift the plank clear of D is 686.4 N. The reaction at C is zero, and the reaction at D is 61.4 kg.
1) R1 and R2 at C and D respectively are given by the equation R2 = (m1 + m2)g - R1, where m1 and m2 are the masses of the plank and load, respectively, and g is the acceleration due to gravity. Hence, substituting values R2 = (20 + 10) × 9.81 - R1 = 294.3 - R1. Now, taking moments about D, the following equation can be obtained: (20 × 1 + 10 × 3)g = R1 × 2 + R2 × 3 = 2R1 + 3 × (294.3 - R1) = 882.9 - R1, from which R1 = 343.7 N and R2 = 294.3 - 343.7 = -49.4 N. Since the support at D can only push the plank upwards and cannot pull it downwards, a negative value for R2 implies that the plank is actually being pulled downwards by an external force. Therefore, the value of R2 is not relevant. 2) The total weight of the plank and the load acting at the end A is 20 + 10 = 30 kg. For the reactions at C and D to be equal, the 24 kg mass must be placed at a distance x from D such that x × 30 = 24 × 6, from which x = 12/5 = 2.4 m. Since the 24 kg mass is being placed to the left of the plank, it will cause the reaction at C to decrease and that at D to increase. Thus, if R is the vertical force applied at B, then taking moments about D gives 20g × 1 - 10g × 3 + R × 6 = 0, from which R = 90 N. Taking moments about C gives R × 3 - 10g × 2 = 0, from which R = 66.3 N. 3) The vertical force applied at B that will just lift the plank clear of D is the weight of the plank and the load acting at the end A plus the weight of the part of the plank that is to the right of D. The weight of the plank and the load acting at the end A is 20 + 10 = 30 kg, and the weight of the part of the plank that is to the right of D is 24 × 1.6 = 38.4 kg. Therefore, the vertical force applied at B that will just lift the plank clear of D is (20 + 10 + 38.4)g = 686.4 N. The reaction at C is zero because the plank is not being supported there anymore. The reaction at D is the same as the weight of the plank and the load acting at the end A plus the weight of the part of the plank that is to the right of D, which is 20 + 10 + 24 × 1.6 = 61.4 kg.For more questions on acceleration
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How are Christian beliefs different than those who believe in reincarnation?
Answers
Answer:
While different religious groups like Hinduism, Sikhism, Jainism, and Buddhism belief in reincarnation and that a person has the chance to be reborn as a new person, depending on how the current life is, Christianity holds a different belief in that there is no reincarnation per se, but there is an afterlife with God for eternity in His kingdom.
Explanation:
The basic concept of reincarnation is a belief held by major religions of the world such as Hinduism, Jainism, Buddhism, and Sikhism. This philosophical belief holds that there is a rebirth or transference of an aspect of a person, be it the soul or mind or any subconscious to a different entity after one dies.
While Christianity does not specifically belief in reincarnation, it does hold the belief that the physical or bodily death of a person is not the end of that person. Rather, Christians belief in the afterlife, a life of eternity with God in His kingdom. This is not the same as reincarnation, for it involves no such rebirth as some other animal or even into a new person or being.
Thus, the Christian belief of afterlife is much different from the other religious beliefs of reincarnation.
Would this pressure difference be greater or smaller if the scuba diver were in seawater (density 1050 kg/m3 ) and went to the same depth you calculated in question D1, took and held his breath, and then returned to the surface
Answers
Answer:
Greater.
Explanation:
This pressure difference will be greater if the scuba diver were in seawater and went to the same depth because the seawater have salts which increases the density of water as compared to freshwater. Salt in water increases the density which automatically increases the pressure on the diver so that's why we can say that the pressure will be increases for the scuba diver in seawater as compared to freshwater.
v=√gr tan 31.0 grados
Answers
The banking angle is the angle that the surface makes with the horizontal, or the angle of inclination.
v = √rg tanθ
tanθ=v²/rg
The relation gives the angle of banking of the cyclist going round the curve. Here v is the speed of the cyclist, r is the radius of the curve, and g is the acceleration due to gravity.
The banking angle is the angle that the surface makes with the horizontal, or the angle of inclination. The normal force acting on the car while travelling through such a curving road has a horizontal component. The centripetal force needed to prevent skidding is provided by this component.
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How far can a cyclist travel in 2.5h along a straight road if her
average speed is 18km/h?
A. 45km B. 7.2km
C. 45m D. 7.2m
Answers
Answer:
I think its 45 km
I HOPE ITS RIGHT IF NOT THEN SORRYHAVE A GREAT DAY :)
The cyclist is travelling at an average speed of 18 km/h for 2.5 hours, then the distance covered by the cyclist will be 45 km. Hence, option A is correct.
What is Speed?The amount of the shift in approach per unit of time or the size of the displacement over time for an object can be used to describe speed, which would be a scalar quantity in everyday language and kinematics.
The maximum speed that can be maintained when a time period grows closer to zero is the starting speed.
By dividing the object's distance traveled by the duration of the interval, the mean pace of the object for the given period of time is calculated. Speed and velocity are not always the same thing.
As per the given information in the question,
Total time taken by the cyclist = 2.5 hours
Average speed of the cyclist = 18 km/h.
Then the distance travelled by the cyclist will be,
\(Speed=\frac{Distance}{Time}\)
D = t × s
D = 2.5 × 18
D = 45 km.
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A ball is rolling along a frictionless track as shown. If it starts at A. with a speed of 12m / s , what is its speed when it arrives at B? Use the conservation of mechanical energy to arrive at the answer. Assume no non- conservative forces. Show complete work for full credit.
Answers
The speed of the object that the point that have been marked as B is 14 m/s
What is the conservation of mechanical energy?
The conservation of mechanical energy is a fundamental principle in physics that states that the total mechanical energy of a system remains constant as long as no external forces do work on the system. This principle applies to systems where only conservative forces are involved, meaning forces that can be derived from a potential energy function.
We know that the kinetic energy is equal to the potential energy thus we have that;
\(1/2mv^2 = mgh\\1/2v^2 = gh\)
v = √2gh
v = √2 * 9.8 * 10
v = 14 m/s
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Different structures give compounds different properties
Answers
i don’t really know if there is supposed to be a “do” in front of the question but that’s what i found!
Example
A 1.8 m tallman stand in an elevator accelerating upward at 12 m/s?,
what is the blood pressure in the brain and foot.
Take the height difference between the heart and the brain to be
0.35 m?
13.3 x 103 Pa] & [Pblood = 1060 kg.m-3]
Note: [: P Heart
Answers
Answer:
Explanation:
From the given information; the diagram below shows a clearer understanding.
The blood pressure in the brain \(P_{brain} = P_{heart} - \delta ( a - g ) h\)
= 13300 - 1060 (12-9.81) 0.35
= 13300 - 1060 (2.19) 0.35
= 13300 - 812.49
= 12487.51 Pa
The blood pressure in the feet \(P_{feet} = P_{heart} + \delta (a + g) h\)
= 13300 + 1060 (12 + 9.81) 1.45
= 13300 + 1060( 21.81 ) 1.45
= 13300 + 33521.97
= 46821.97 Pa
Answer:
The blood pressure in the brain = \(12487.51 pa\)The blood pressure in the feet = \(46821.97pa\)Explanation:
\(P_brain = P_heart - y(a - g)h\\\\P_brain = 13300 - 1060 (12-9.81)0.35\\\\P_brain = 12487.51 pa\\\\\)
\(P_feet = P_heart + y(a+g)*h_r\\\\P_feet = 13300 + 1060(12+9.81)*(1.8-0.35)\\\\P_feet = 46821.97pa\)
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A bus run at 100 km/hr top speed. It can carry a maximum of 6 persons. If speed of bus decreases in fixed proportion with increase in number of person, find speed when three person are traveling in bus.
Answers
Answer:
150 km/h
Explanation:
It is given that,
Speed of a bus is 100 km/h and it can carry a maximum of 6 persons.
If speed of bus decreases in fixed proportion with increase in number of person, then we need to find the speed when 3 person are traveling in bus.
6 person = 100 km/h
1 person = (100/6) km/h
Ans
3 person = \(\dfrac{100}{6}\times 3=50\ km/h\)
Net speed = 100 km/h + 50 km/h = 150 km/h
Hence, if the required speed is 150 km/h.
The first P-wave of an earthquake travels 5600 kilometers from the epicenter and arrives at a seismic station at 10:05 a.m. At what time did this earthquake occur?
Ahhhhhh I have a Regent's test in 2 hours and I don't know how to solve this type of question! Any help would be appreciated.
Anyone know what the steps to do this are? I dont even need an answer, just how to get to it. Thank you!
Answers
The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.
The p-waves travel with a constant velocity of 7 km/s
The time can be calculated by using the formula
t = d / v
where
T1 = 10:05 a.m
d is the distance they take to travel from the epicenter
v is the speed of the p-waves
On average, the speed of p-waves is
v = 7 km/s
d = 5600 km (given)
Substituting the values in the formula;
t = d / v
t = 5600 ÷ 7
t = 800 seconds
Converting into minutes,
t = 800 ÷ 60
t = 13.3
≈ 13 mins
T1 - 13 mins = T2
10:05 - 13 mins = 9.52 am
It means the earthquake occurred prior 13 minutes, that is at 9.52 am.
Therefore, the earthquake occurred at 9.52 am.
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An electron moving in the y direction, at right angles to a magnetic field, experiences a magnetic force in the -x direction. The direction of the magnetic field is in the
Answers
Answer:
The direction of magnetic field is along + Z axis.
Explanation:
The direction of motion of electron is along y axis.
The magnetic force is along - X axis.
The force on the charged particle moving in the magnetic field is
\(\overrightarrow{F} = q (\overrightarrow{v}\times \overrightarrow{B})\\\\- F \widehat{i} = - q (v \widehat{j}\times \overrightarrow{B})\\\)
So, the direction of the magnetic field is along + Z axis.
How does something(the big bang) come from nothing by nothing i mean the first universe although we don't know where the first universe is but we do know that nothing can't come from something.
Answers
The Big Bang theory is the most widely accepted explanation for the origins of the universe, but it does not necessarily imply that the universe emerged from nothing.
It is possible that new discoveries or insights may shed light on this fundamental question in the future. The universe may have arisen from a pre-existing state or through some other natural process that we do not yet understand.
Instead, the theory describes how the universe underwent a rapid expansion from a very dense and hot state. The conditions and laws of physics that applied during the earliest moments of the universe may not necessarily be the same as those we observe today, and there are many unknowns and uncertainties in our understanding of these early stages.
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Two cars collide head-on and stick together.
Car A, with a mass of 2000 kg, was initially
moving at a velocity of 10 m/s to the east. Car
B, with an unknown mass, was initially at rest.
After the collision, both cars move together at
a velocity of 5 m/s to the west. What is the
mass of Car B?
OF
Answers
The mass of Car B is -6000 kg.
To solve this problem, we can apply the principle of conservation of momentum, which states that the total momentum before the collision is equal to the total momentum after the collision.
Therefore, we can write the equation for the conservation of momentum as:
(mass of Car A * velocity of Car A) + (mass of Car B * velocity of Car B) = (mass of Car A + mass of Car B) * velocity after collision
Let's substitute the given values into the equation:
(2000 kg * 10 m/s) + (mass of Car B * 0 m/s) = (2000 kg + mass of Car B) * (-5 m/s)
Simplifying the equation:
20000 kg*m/s = -5 m/s * (2000 kg + mass of Car B)
Dividing both sides by -5 m/s:
-4000 kg = 2000 kg + mass of Car B
Subtracting 2000 kg from both sides:
mass of Car B = -4000 kg - 2000 kg
mass of Car B = -6000 kg
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What is the term used when a ball is hit and the batter reaches the following bases safely (without being called out)?
please help me
a) first base
b)second base
c)third base
d) homerun
Answers
A car is traveling at a constant speed on the highway. Its tires have a diameter of 68.0 cm and are rolling without sliding or slipping. If the angular speed of the tires is 55.0 rad/s , what is the speed of the car?
Answers
Answer:
37.4m/s
Explanation:
since the car doesn't accelerate, we can use the formula v=ωr where v is linear speed, ω is angular speed (rads/second) and r is radius. Substitute values for equation:
v=55*0.68
v=37.40
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Study the scenario.
Boiling water is poured into a Styrofoam cup and a metal cup. You pick up and hold the metal cup and the Styrofoam cup. The metal cup burns your fingers, but you can hold the Styrofoam cup without experiencing any pain.
The difference in the rate at which these two materials transfer thermal energy throughout the cups is known as __________.
evaporation
electrical energy
thermal conductivity
condensation
Answers
Answer: thermal conductivity
The difference in the rate at which these two materials transfer thermal energy throughout the cups is known as thermal conductivity.
What is thermal conductivity?It is the rate where the heat is to be transferred from conduction via the cross section area of the unit with respect to the material at the time when the temperature should be gradient and existed with the perpendicular to the area.
Also, in this, two material is to be transferred via the thermal energy with the help of cups.
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