In which of the following ways humans use water resources for recreation purposes?
(a) They ride in boats on rivers.
(b) They raise fish to sell in stores.
(c) They spray water on crops in fields.
(d) They build dams to make electricity.
Please answer and also mention why
Refer to the given figure and select the correct option regarding it.
A P is the molten part made up of nickel and iron.
B R is the hottest part of Earth which is solid.
C Q is connected to surface with the help of volcanoes.
D Minerals and oil deposits are found in the part S.
A large area of forest was destroyed completely by forest fire. Which of the following statements hold(s) true regarding it?
(i) More soil will be eroded as the soil is not protected by trees from wind and rain.
(ii) The land will have more fresh air as there are lesser trees to take in oxygen.
(iii) Wildlife will inhabit the cleared area because more space is available now.
(iv) New trees will grow quickly to replace the burnt ones as the ash of the burnt trees will make the soil more fertile.
A (i) only
B (i) and (iv) only
C (i), (ii) and (iv) only
D (i), (ii), (iii) and (iv)
the answer should be option B not A because ash does act like a natural fertiliser ,. I have already searched on the internet .
In the given figure (not drawn to scale), ABCD is a parallelogram and GBEF is a rectangle. Find x - y.
Match the given columns and select the correct option from the codes given below.
A p-4-f, q-2-h, r-1-d, s-3-e, t-5-g
B p-2-f, q-1-e, r-4-h, s-5-g, t-3-d
C p-2-f, q-5-g, r-4-h, s-3-d, t-1-e
D p-1-g, q-4-f, r-5-h, s-2-e, t-3-d
Read the passage carefully and answer Q.
A train starts from rest and accelerates uniformly at 100 min_2 for 10 min. It then maintains a constant velocity for 20 minutes. The brakes are then applied and the train is uniformly retarded. It comes to rest in 5 minutes.
The total distance travelled is
(A) 27500 m
(B) 37500 m
(C) 4200 m
(D) 5000 m.
The distance of a particle as a function of time is shown below. The graph indicates that
(A) The particle starts with certain velocity but the motion is retarded and finally the particle stops
(B) The velocity of the particle is constant throughout
(C) The acceleration of the particle is constant throughout in the direction of motion
(D) The particle starts with some constant velocity, the motion is accelerated, and finally
the particle moves with some constant velocity.
Help me to solve this question.