Answer:
17.69 m
Explanation:
The time it takes the brick to strike the ground is 1.90 seconds.
We can apply one of Newton's equation of linear motion to find the height of the building:
![s = ut + 0.5gt^2](https://tex.z-dn.net/?f=s%20%3D%20ut%20%2B%200.5gt%5E2)
where s = distance (in this case height)
u = initial velocity = 0 m/s
t = time = 1.90 s
g = acceleration due to gravity = 9.8 m/s^2
Therefore:
s = (0 * 1.9) + (0.5 * 9.8 * 1.9 * 1.9)
s = 0 + 17.68
s = 17.69 m
The height of the building is 17.69 m.
Kepler's third law of planetary motion states that:
"The ratio between the cube of the orbital radius of the planet and the square of the orbital period is constant". In formulas:
![\frac{r^3}{T^2} = k](https://tex.z-dn.net/?f=%20%5Cfrac%7Br%5E3%7D%7BT%5E2%7D%20%3D%20k)
where r is the orbital radius and T the orbital period.
Since this ratio is constant for every planet, we see that when the orbital radius r is larger (i.e. when the planet is farther from the Sun), the orbital period T is larger: this means the planet takes more time to complete one revolution around the Sun, so it moves slower.
Therefore, the correct option is:
<span>A planet moves slowest when it is farthest from the sun.</span>
Answer:
an instrument designed to measure electric current, voltage, and usually resistance, typically over several ranges of value.
Answer:
1) force = 8.4 N
2) acceleration = 1 m/s^-2
Explanation:
I've attached the working
choose the first option ...........