Answer;
= 0.244 seconds
Explanation;
500 rpm is equivalent to; 1500 × 2π radians per minute
= 9424.8 rad/minute
To get revolutions per second we divide by 60
= 9424.8/60
= 157.08 radians per second.
Then we divide by 64.3 rad/s^2 to get time;
= 157.08/64.3
= 0.244 seconds.
D. The answer is D because any other scenario is possible. For example, in A, John could very easily put the planets in order. In problem B, he could draw some planets bigger than others. On C, he could color the planets on a different color. He can not hovever, move the planets
Answer:
v = - 0.4 m/s
Explanation:
Initial momentum is zero as neither gun nor bullet have velocity
Conservation of momentum
0 = 0.020(50) + 2.5v
v = - 0.4 m/s
I would say B
Because technically if your just holding it your not doing anything
-May
Answer:
The mass of the water on earth is 
Explanation:
Given that,
Average depth h= 0.95 mi



Radius of earth 
Density = 1000 kg/m³
We need to calculate the area of surface
Using formula of area

Put the value into the formula


We need to calculate the volume of earth

Put the value into the formula


Now, 70 % volume of the total volume


We need to calculate the mass of the water on earth
Using formula of density


Put the value into the formula


Hence, The mass of the water on earth is 