Answer:
a. increases
Explanation:
Outdoor pipe organ is a musical instrument that is used to play music. It produces some soothing notes and is very peaceful to the ears. The organ pipe is the source of sound for the outdoor organ. And the length of the pipe determines the wavelength of the sound. When the air temperature of the surrounding is increased, the fundamental frequency of one of the organ pipes will be increased as the speed of the sound will increased.
It would be B because it makes science to the topic
Answer:
It increases the time it takes for the person to stop.
Explanation:
In order to accelerate the dragster at a speed
![v_f = 100 m/s](https://tex.z-dn.net/?f=v_f%20%3D%20100%20m%2Fs)
, its engine must do a work equal to the increase in kinetic energy of the dragster. Since it starts from rest, the initial kinetic energy is zero, so the work done by the engine to accelerate the dragster to 100 m/s is
![W= K_f - K_i = K_f = \frac{1}{2}mv_f^2=2.5 \cdot 10^6 J](https://tex.z-dn.net/?f=W%3D%20K_f%20-%20K_i%20%3D%20K_f%20%3D%20%20%5Cfrac%7B1%7D%7B2%7Dmv_f%5E2%3D2.5%20%5Ccdot%2010%5E6%20J%20%20)
however, we must take into account also the fact that there is a frictional force doing work against the dragster, and the work done by the frictional force is:
![W_f = F_f d = -(1200 N)(400 m)= -4.8 \cdot 10^5 J](https://tex.z-dn.net/?f=W_f%20%3D%20F_f%20d%20%3D%20-%281200%20N%29%28400%20m%29%3D%20-4.8%20%5Ccdot%2010%5E5%20J)
and the sign is negative because the frictional force acts against the direction of motion of the dragster.
This means that the total work done by the dragster engine is equal to the work done to accelerate the dragster plus the energy lost because of the frictional force, which is
![-W_f](https://tex.z-dn.net/?f=-W_f)
:
![W_t = W + (-W_f)=2.5 \cdot 10^6 J+4.8 \cdot 10^5 J=2.98 \cdot 10^6 J](https://tex.z-dn.net/?f=W_t%20%3D%20W%20%2B%20%28-W_f%29%3D2.5%20%5Ccdot%2010%5E6%20J%2B4.8%20%5Ccdot%2010%5E5%20J%3D2.98%20%5Ccdot%2010%5E6%20J)
So, the power delivered by the engine is the total work divided by the time, t=7.30 s:
![P= \frac{W}{t}= \frac{2.98 \cdot 10^6 J}{7.30 s}=4.08 \cdot 10^6 W](https://tex.z-dn.net/?f=P%3D%20%5Cfrac%7BW%7D%7Bt%7D%3D%20%5Cfrac%7B2.98%20%5Ccdot%2010%5E6%20J%7D%7B7.30%20s%7D%3D4.08%20%5Ccdot%2010%5E6%20W%20%20)
And since 1 horsepower is equal to 746 W, we can rewrite the power as
Hi there!
Momentum (p) = m · v
Calculate for each:
Table tennis ball: p = 0.003 kg × 16 m/s = <em>0.048 kgm/s</em>
Soccer ball: p = 0.43 kg × 16 m/s = <em>6.88 kgm/s</em>
<em></em>
The momentum of the soccer ball is GREATER THAN the momentum of the table tennis ball.