Advertisements
Advertisements
प्रश्न
What is the difference between renewable and non-renewable resources?
उत्तर
| Renewable Sources | Non-renewable Sources |
| 1. The resources that can be renewed by reproduction are called renewable resources. | 1. The resources that are present in fixed quantities are called non-renewable. |
| 2. Renewable resources are inexhaustible. | 2. Non-renewable resources are exhaustible. |
| 3. Renewable resources are not affected by human activities. | 3. Non-renewable resources are affected by human activities. |
| 4. They are the non-conventional sources. | 4. They are the conventional sources. |
| 5. Example: Wind energy, solar energy, and hydro energy. | 5. Example: Coal, petroleum, and natural gas. |
APPEARS IN
संबंधित प्रश्न
In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east, as shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero.
A water pump raises 50 litres of water through a height of 25 m in 5 s. Calculate the power of the pump required.
(Take g = 10 N kg-1 and density of water = 1000 kg m-3)
.A man raises a box of mass 50kg to a height of 2m in 20s, while another man raises the same box to the same height in 50s. Compare:
(i) the work done, and
(ii) the power developed by them.
A vessel containing 50 kg of water is placed at a height 15 m above the ground. Assuming the gravitational potential energy at ground to be zero, what will be the gravitational potential energy of water in the vessel? (g = 10 m s-2)
A car is running at a speed of 15 km h-1 while another similar car is moving at a speed of 45 km h-1. Find the ratio of their kinetic energies.
How many watts equal one horse power?
Why is the work done on an object moving with uniform circular motion zero?
Write an expression for work done by a force depends?
An object is dropped from a height H. when is its
(i) P.E. maximum,
(ii) K.E. maximum,
(iii) P.E. = K.E.?
(a) Define power and name its unit.
(b) A girl weighting 50 kg climbs up 60 steps each of 20 cm height in 5 minutes. Calculate the power developed.
State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.
State larger units of power.
If a ball is dropped on the sloping roof of a house, it acquires ______ and falls on the ground. That is the transformation of ______ energy into ______ energy takes place.
(kinetic, potential, motion)
Who is the odd one out?
Work done by this force at any instant is ______.
