Answer:
![\Delta F = 13.52~N/m^2](https://tex.z-dn.net/?f=%5CDelta%20F%20%3D%2013.52~N%2Fm%5E2)
Explanation:
We will use the relationship between impulse and momentum.
![\vec{J} = \Delta \vec{P}\\\vec{F}\Delta t = \vec{P}_2 - \vec{P}_1](https://tex.z-dn.net/?f=%5Cvec%7BJ%7D%20%3D%20%5CDelta%20%5Cvec%7BP%7D%5C%5C%5Cvec%7BF%7D%5CDelta%20t%20%3D%20%5Cvec%7BP%7D_2%20-%20%5Cvec%7BP%7D_1)
We are considering the change of momentum of Superman at the moment of collision.
![\Delta P_{Superman} = 0 - P_{bullets}](https://tex.z-dn.net/?f=%5CDelta%20P_%7BSuperman%7D%20%3D%200%20-%20P_%7Bbullets%7D)
![P_{bullets} = mv = (160\times 8\times 10^{-3})450 = 576](https://tex.z-dn.net/?f=P_%7Bbullets%7D%20%3D%20mv%20%3D%20%28160%5Ctimes%208%5Ctimes%2010%5E%7B-3%7D%29450%20%3D%20576)
![F*(60s) = 576\\F = 9.6 N](https://tex.z-dn.net/?f=F%2A%2860s%29%20%3D%20576%5C%5CF%20%3D%209.6%20N)
This force is distributed throughout Kal-El’s chest. So, the average force is
![\Delta F = F/Area = 9.6 / 0.71 = 13.52~N/m^2](https://tex.z-dn.net/?f=%5CDelta%20F%20%3D%20F%2FArea%20%3D%209.6%20%2F%200.71%20%3D%2013.52~N%2Fm%5E2)
Answer:
Florence is often named as the birthplace of the Renaissance. The early writers and artists of the period sprung from this city in the northern hills of Italy. As a center for the European wool trade, the political power of the city rested primarily in the hands of the wealthy merchants who dominated the industry
Explanation:
Answer:
300 m
Explanation:
The ball moves with constant velocity, so the distance it covers is given by:
![d=vt](https://tex.z-dn.net/?f=d%3Dvt)
where
v=6 m/s is the ball's velocity
t=50 s is the time
Substituting these numbers into the equation, we find
![d=(6 m/s)(50 s)=300 m](https://tex.z-dn.net/?f=d%3D%286%20m%2Fs%29%2850%20s%29%3D300%20m)
ANSWER
![B. 40.6\degree](https://tex.z-dn.net/?f=B.%2040.6%5Cdegree)
EXPLANATION
A sketch of the vector is shown in the diagram in the attachment.
The side adjacent to the angle we want to find is 3.5 units and the opposite side is 3 units.
Let the angle between the vector and the x-axis be ![\phi](https://tex.z-dn.net/?f=%5Cphi)
then,
![\tan\phi =\frac{3}{3.5}](https://tex.z-dn.net/?f=%5Ctan%5Cphi%20%3D%5Cfrac%7B3%7D%7B3.5%7D)
![\tan\phi=0.8571](https://tex.z-dn.net/?f=%5Ctan%5Cphi%3D0.8571)
This implies that,
![\phi=tan{-1}(0.8571)](https://tex.z-dn.net/?f=%5Cphi%3Dtan%7B-1%7D%280.8571%29)
![\phi=40.6013](https://tex.z-dn.net/?f=%5Cphi%3D40.6013)
The correct answer is B
Therefore the angle 40.6° to the nearest tenth.
Answer:
visible waves are needed for green plants to grow.
Explanation:
During photosynthesis, chlorophyll absorbs energy from blue- and red-light waves, and reflects green-light waves, making the plant appear green.