Answer:
,
Explanation:
The volume of all oceans is:
Ocean water has a density of 
, the mass of all oceans is:
Answer:
B. 1/6 m/s
Explanation:
Parameters given:
Mass of first glider, m = 1 kg
Initial speed of first glider, u = 1 m/s
Mass of second glider, M = 5 kg
Initial speed of second glider, U = 0 m/s.
Using the principle of conservation of momentum, we have that:
Total initial momentum = Total final momentum
=> m*u + M*U = m*v + M*V
Where v is the final velocity of the first glider and V is the final velocity of the second glider.
Since they stick upon collision, their final velocities are the same, hence, v = V
m*u + M*U = m*v + M*v
m*u + M*U = (m + M)*v
Also, since the second glider is initially at rest, U = 0
m*u = (m + M)*v
Therefore,
v = (m*u) / (m + M)
v = (1 * 1) / (1 + 5)
v = 1/6 m/s
Answer:
100kg
Explanation:
Total force =400N+600N=1000N
As we have,
F=m×g
1000N=m×10m/s²
1000N÷10m/s²=m
m=100kg
Answer:
Is the sum of potential and kinetic energy in an object that is used to do work.
Answer:
The engine would be warm to touch, and the exhaust gases would be at ambient temperature. The engine would not vibrate nor make any noise. None of the fuel entering the engine would go unused.
Explanation:
In this ideal engine, none of these events would happen due to the nature of the efficiency.
We can define efficiency as the ratio between the used energy and the potential generable energy in the fuel.
n=W, total/(E, available).
However, in real engines the energy generated in the combustion of the fuel transforms into heat (which heates the exhost gases, and the engine therefore transfering some of this heat to the environment). Also, there are some mechanical energy loss due to vibrations and sound, which are also energy that comes from the fuel combustion.
