Astromical Scale is dealt with the _________ Physics

(a)

Mesoscopic

(b)

Microscopic

(c)

Macroscopic

(d)

None

Choose the motion in two dimension from the following.

(a)

Motion of a train along a straight railway track

(b)

An object falling freely under gravity close to the Earth.

(c)

A particle moving along a curved path in a plane.

(d)

Flying of a kite on a windy day.

Two blocks A & B of masses 2m & m are connected by a massless and inextensible strong. The magnitudes of acceleration of A & B immediately after the string is cut are ____________.

(a)

\(\frac { g }{ 2 } \),g

(b)

g,g

(c)

g,\(\frac { g }{ 2 } \)

(d)

\(\frac { g }{ 2 } \),\(\frac { g }{ 2 } \)

A cricket ball falls from a height of 40 m. What is the velocity with which the ball hits the ground?

(a)

40 m/s

(b)

20 m/s

(c)

16 m/s

(d)

28 m/s

Four identical spheres each of mass m are placed at the corners of square of side 2 m. Taking the point of intersection of the diagonals as the origin the coordinates of the centre of mass are?

(a)

(1, 1)

(b)

(0, 0)

(c)

(1, -1)

(d)

(-1, 1)

A body of mass 500g is town upwards with a velocity 20ms^-1 and reaches back to the surface of a planet after 20s. Then the weight of the body on that planet is _____________.

(a)

2 N

(b)

4 N

(c)

5 N

(d)

1 N

Water rises in a capillary tube to a certain height such that the upward force due to the surface tension is balanced by 62.84\(\times\)10^-5N force due to the weight of the liquid column. If the surface tension of water is 70\(\times\)10^-3Nm the radius of the capillary tube is ____________.

(a)

1.43\(\times\)10^-3m

(b)

2.83\(\times\)10^-3 m

(c)

1.43\(\times\)10^-2 m

(d)

2.83\(\times\)10^-3 m

 Surface of the lake is at 2°C and depth of the lake is 20m find the temperature of the bottom of the lake ______________.

(a)

2⁰C

(b)

3⁰C

(c)

4⁰C

(d)

none of the above

If there are n no. of molecules per unit volume and m is the mass of each, Vx is the x - component of velocity pressure can be written as _______________.

(a)

P= nm\({ V }_{ x }^{ 2 }\)

(b)

P= 2nm\({ V }_{ x }^{ 2 }\)

(c)

P= m\({ V }_{ x }^{ 2 }\)

(d)

P= n\({ V }_{ x }^{ 2 }\)

The function x =Asin²ωt + B cos²ωt + c sin rot cos rot represents simple harmonic motion for which of the option?

(a)

for all values of A, B & C (C# 0) (b) \(\frac{r}{10}\)

(b)

A=B, C = 2B

(c)

CA = -B, C = 2B

(d)

all of the above