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erik [133]
3 years ago
14

You throw a basketball and a tennis ball across the classroom so that each ball has the exact same momentum. Explain how this is

possible given that a basketball has more mass than a tennis ball.
Physics
1 answer:
Helga [31]3 years ago
7 0

Answer:

It is possible by increasing the speed of the tennis ball by a factor of (Mass of the tennis ball)/(Mass of the basketball)

Explanation:

The momentum of a body = The bod's mass × The body's velocity

Therefore, the momentum of a given mass of an object, such as a tennis ball can be increased by increasing the velocity or speed of the object. Whereby the speed of the ball, v₁, is increased such that the momentum of the basketball and the tennis ball will be the same, is given by the following equation

Mass of the basketball × v₂ = Mass of the tennis ball × v₁

Therefore, v₁/v₂ = (Mass of the tennis ball)/(Mass of the basketball)

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Practice: The speed of sound at sea level is normally about 340 m/s. A car honks its horn as it drives toward an observer. The f
stepan [7]

Answer:

25.5 m/s

Explanation:

The Doppler effect occurs when there is relative motion between a source of a wave and an observer. In such situation, there is a shift in the apparent frequency of the wave perceived by the observer.

The formula that gives the apparent frequency perceived by the observer is:

f'=\frac{v\pm v_o}{v\pm v_s}f

where

f is the real frequency of the wave

f' is the apparent frequency of the wave

v is the speed of the wave

v_s is the velocity of the source (negative if the source is moving towards the observer, positive otherwise)

v_o is the velocity of the observer (positive if the observer is moving towards the source, negative otherwise)

In this problem:

v = 340 m/s is the speed of sound

f = 800 Hz is the frequency of the horn

f' = 860 Hz is the apparent frequency

v_o=0 (the observer is at rest)

Re-arranging the equation for v_s, we can find the velocity of the horn and the driver:

f'=\frac{v}{v-v_s}f\\(v-v_s)f'=vf\\vf'-v_sf'=vf\\v_s=v\frac{f'-f}{f'}=(340)\frac{860-800}{860}=25.5 m/s

So, 25.5 m/s towards the observer.

3 0
3 years ago
Intrapulmonary pressure is the _______________________.
lisabon 2012 [21]
Intrapulmonary pressure is the pressure within the lungs
4 0
3 years ago
What is Matter? write its types​
Rus_ich [418]

According to definition of general chemistry matter is any substance which has atleast a mass and occupies a volume.

Matter is of three types

  1. Solid
  2. Liquid
  3. Gas
7 0
3 years ago
What is the minimum force required to increase the energy of a car by 68 j over a distance of 12 m? Assume the force is constant
g100num [7]
The wording of this can be bothersome. I think you should be using
E = F * d
E = 68 J
d = 12 m
F = ???

68J = F * 12 m
68J/12 m = F
5.67 N

A <<<<<====== Answer

3 0
3 years ago
What is the frequency of a photon that has the same momentum as a neutron moving with a speed of 1.90 × 103 m/s?
Minchanka [31]
The mass of a neutron is:
m=1.67 \cdot 10^{-27}kg
Since we know its speed, we can calculate the neutron's momentum:
p=mv=(1.67 \cdot 10^{-27}kg)(1.90 \cdot 10^3 m/s)=3.17 \cdot 10^{-24} kg m/s

The problem says the photon has the same momentum of the neutron, p.  The photon momentum is given by
p= \frac{h}{\lambda}
where h is the Planck constant, and \lambda is the photon wavelength. If we re-arrange the equation and we use the momentum we found before, we can calculate the photon's wavelength:
\lambda= \frac{h}{p}= \frac{6.6 \cdot 10^{-34}Js}{3.17 \cdot 10^{-24} kg m/s}=2.08 \cdot 10^{-10} m

And since we know the photon travels at speed of light c, we can now calculate the photon frequency:
f= \frac{c}{\lambda}= \frac{3 \cdot 10^8 m/s}{2.08 \cdot 10^{-10} m}=  1.44 \cdot 10^{18} Hz
4 0
3 years ago
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