The gravitational force on two objects can be determined by the following equation:
Where G is the gravitational constant m1 is mass 1, m2 is the second mass nad r^2 is distance between these objects. Therefore, let m1 = mass of Sun 1.99x10^30 kg, m2= mass of Jupiter 1.90x10^27 kg, r is the average distance between the Sun and Jupiter 7.78x10^11 m. By plugging these values in we have:
F=4.17x10^23 N
Answer:
The surface temperature of the brake shoe and drum is 95°C.
Explanation:
Given that,
Rate of heat = 75 W
Surface area = 0.1 m²
Heat transfer coefficient = 10 W/m²
Temperature = 20°C
We need to calculate the surface temperature of the brake shoe and drum
Using equation of heat
Put the value into the formula
Hence, The surface temperature of the brake shoe and drum is 95°C.
Answer:
Explanation:
If the hippo is laying on the rock, I'm assuming that there is no movement going on at all, in either the hippo or the rock. If no movement occurs, there is no work being done.
The answer is 2 and 3 because light bulbs dont produce uv rays and uv rays are very dangerous to people.
Answer:
Part a)
Part b)
Part c)
distance L is independent of the mass of the sphere
Explanation:
Part a)
As we know that rotational kinetic energy of the sphere is given as
so we will have
so we will have
Part b)
By mechanical energy conservation law we know that
Work done against gravity = initial kinetic energy of the sphere
So we will have
Part c)
by equation of energy conservation we know that
so here we can see that distance L is independent of the mass of the sphere