Answer:
116 N
Explanation:
Missing question: (found on google)
<em>"What is the force of the pitcher's hand on the 0.145 kg ball during this acceleration phase?
</em>
<em>Express your answer with the appropriate units."</em>
Solution:
First of all, we need to calculate the acceleration of the ball, given by
![a=\frac{v-u}{\Delta t}](https://tex.z-dn.net/?f=a%3D%5Cfrac%7Bv-u%7D%7B%5CDelta%20t%7D)
where
v = 40 m/s is the final velocity
u = 0 is the initial velocity
is the duration of the acceleration phase
Substituting,
![a=\frac{40-0}{0.05}=800 m/s^2](https://tex.z-dn.net/?f=a%3D%5Cfrac%7B40-0%7D%7B0.05%7D%3D800%20m%2Fs%5E2)
Now we can find the force exerted on the ball by using Newton's second law:
![F=ma](https://tex.z-dn.net/?f=F%3Dma)
where
m = 0.145 kg is the mass of the ball
a is the acceleration
Substituting,
![F=(0.145)(800)=116 N](https://tex.z-dn.net/?f=F%3D%280.145%29%28800%29%3D116%20N)
Answer:
D. trying to eat healthier foods
Explanation:
Electromagnetic wave “nc”
Answer:
![Density = 33835kg/m^3](https://tex.z-dn.net/?f=Density%20%3D%2033835kg%2Fm%5E3)
Explanation:
Given
![Mass = 67.67g](https://tex.z-dn.net/?f=Mass%20%3D%2067.67g)
![Volume = 2mL](https://tex.z-dn.net/?f=Volume%20%3D%202mL)
Required
Determine the density
![Density = \frac{Mass}{Volume}](https://tex.z-dn.net/?f=Density%20%3D%20%5Cfrac%7BMass%7D%7BVolume%7D)
First, we need to convert mass to kg
![Mass = 67.67g](https://tex.z-dn.net/?f=Mass%20%3D%2067.67g)
![Mass = \frac{67.67kg}{1000}](https://tex.z-dn.net/?f=Mass%20%3D%20%5Cfrac%7B67.67kg%7D%7B1000%7D)
![Mass = 0.06767kg](https://tex.z-dn.net/?f=Mass%20%3D%200.06767kg)
Next, we need to convert volume to m^3
![Volume = 2mL](https://tex.z-dn.net/?f=Volume%20%3D%202mL)
![Volume = 2 * 10^{-6}m^3](https://tex.z-dn.net/?f=Volume%20%3D%202%20%2A%2010%5E%7B-6%7Dm%5E3)
Density is then calculated as follows:
![Density = \frac{0.06767}{2 * 10^{-6}}](https://tex.z-dn.net/?f=Density%20%3D%20%5Cfrac%7B0.06767%7D%7B2%20%2A%2010%5E%7B-6%7D%7D)
![Density = \frac{0.06767 * 10^6}{2}](https://tex.z-dn.net/?f=Density%20%3D%20%5Cfrac%7B0.06767%20%2A%2010%5E6%7D%7B2%7D)
![Density = \frac{67670}{2}](https://tex.z-dn.net/?f=Density%20%3D%20%5Cfrac%7B67670%7D%7B2%7D)
![Density = 33835kg/m^3](https://tex.z-dn.net/?f=Density%20%3D%2033835kg%2Fm%5E3)
I think the correct answer would be old and metal poor stars are found in the galactic nucleus. This nucleus us a region in the center of a galaxy which contains a higher luminosity than other parts. It produces very high amounts of energy. Hope this helps.