Question

11. Distinguish between healthy and disease free
2
12. An object is thrown vertically upwards with a velocity Soms Calculate
(1) the total time taken by the object to reach the ground. (8-10m/')
(b) the distance covered and the displacement of the object when it reaches the
ground
3
1.3. (a) Calculate the mass of two moles of methane
3
(b) Find out the mass of one atom of calcium in gram
(C) Write the difference between 21 and H.
14.a. State the postulate of Dalton atomic theory, which cannot explain about
Isotope.
5
b. Give one example of homo tetra atomic molecule,
c. Identify the cation and anion present in aluminum nitrate,
d. Distinguish between molecular mass and formula unit mass on the basis of
1) definition
1) сxample
15. (a) The earth is acted upon by gravitation of sun, even though it does not fall
into the sun. Justily
S
(b) Differentiate between and G. (any two)
How does the weight of an object vary when it is taken from the earth to a
planet whose mass is 4 times the mass of the earth but size is same as that of the​

Answer 1

Answer:

Initially the body starts its motion from rest therefore u=0. Let journey be A when a acceleration of earth is acting on the body time =5 seconds let's find v

v=u+at

=0+9.8×5=49m/s

When acceleration stops acting the velocity of the body is 49m/s. Now the distance traveled by the body in next 3s

S=ut+

2

1

gt

2

=49×3+

2

1

×0×t

2

=49×3

=147m.