Answer:
Explanation:
The formula is
![F=\frac{G*m_1*m_2}{r^2}](https://tex.z-dn.net/?f=F%3D%5Cfrac%7BG%2Am_1%2Am_2%7D%7Br%5E2%7D)
so anything making m larger increases the force
anything that decreases r makes F smaller.
B
So if you double each of the masses, the force becomes 4 times as large.
![F = \frac{G*2m_1*2m_2}{r^2}\\F = \frac{{4Gm_1*m_2}}{r^2}](https://tex.z-dn.net/?f=F%20%3D%20%5Cfrac%7BG%2A2m_1%2A2m_2%7D%7Br%5E2%7D%5C%5CF%20%3D%20%5Cfrac%7B%7B4Gm_1%2Am_2%7D%7D%7Br%5E2%7D)
C
If the distance r is doubled, the force becomes 1/4 as large. That's because
r becomes 2r and when 2r is squared it becomes 4r^2. But that is in the denominator, so you are dividing by 4.
D
This is the hard one. You really have to understand fractions to know what is happening. it might be easier if we use decimals. Each r become 1/2 r or 0.5r
When you square that, you get 0.25 r^2
Just try it with something simple. Let r = 1 Now suppose that Gm1m2 = 20
20/0.25 = 80
When you 1/2 the distance the force is going to be 4 times as large.
Answer:
physical weathering
Explanation:
when the rain rains so heavily and the top soil is washed away
6. Magnitude
7. Direction
8. Two
Answer:
First is incrcersing mangnetic field second photosphere
Explanation:
sorry if the first one is wrong
Answer:
Magnitude of momentum of the sparrow ![=0.23\ kg\ ms^{-1}](https://tex.z-dn.net/?f=%3D0.23%5C%20kg%5C%20ms%5E%7B-1%7D)
Explanation:
Given:
Mass of sparrow = 28 g = ![\frac{28}{1000}\ kg= 0.028\ kg](https://tex.z-dn.net/?f=%5Cfrac%7B28%7D%7B1000%7D%5C%20kg%3D%200.028%5C%20kg)
Speed(velocity) of sparrow = ![8.1\ ms^{-1}](https://tex.z-dn.net/?f=8.1%5C%20ms%5E%7B-1%7D)
Momentum of sparrow = ![mass\times velocity = 0.028 \times 8.1 = 0.2268\ kg\ ms^-1](https://tex.z-dn.net/?f=mass%5Ctimes%20velocity%20%3D%200.028%20%5Ctimes%208.1%20%3D%200.2268%5C%20kg%5C%20ms%5E-1)
Momentum of sparrow in two significant figure can be given as ![=0.23\ kg\ ms^{-1}](https://tex.z-dn.net/?f=%3D0.23%5C%20kg%5C%20ms%5E%7B-1%7D)