# KVPY Stream-SA (Class 11) Physics: Questions 142 - 145 of 252

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## Question number: 142

Appeared in Year: 2015

MCQ▾

### Question

The international space station is maintained in a nearly circular orbit with a mean altitude of 330 km and a maximum of 410 km. An astronaut is floating in the space station’s cabin. The acceleration of astronaut as measured from the earth is

### Choices

Choice (4) Response

a.

Nearly zero and directed towards the earth

b.

Nearly g and directed along the line of travel of the station

c.

Nearly g and directed towards the earth

d.

Zero

## Question number: 143

MCQ▾

### Question

What is actual meaning of coefficient of superficial expansion?

### Choices

Choice (4) Response

a.

Coefficient of total expansion due to change in pressure

b.

The total expansion of area due to change in temperature

c.

The fractional change in area per unit rise of temperature

d.

All of the above

## Question number: 144

MCQ▾

### Question

A block, resting on the top of a plane inclined at 450 with the horizontal, slides down with an acceleration of . Calculate the coefficient of kinetic friction.

### Choices

Choice (4) Response

a.

b.

2

c.

d.

## Question number: 145

MCQ▾

### Question

A 15.0 W electrical heater is used to heat a container filled with 0.5 kg of water. It is found that the temperature of the water and the container rise by 4 K in 20 minutes. The container is then emptied, dried, and filled with 3 kg of oil. It is now observed that the same heater raises the temperature of the container-oil system by 3 K in 25 minutes. Assuming no other heat losses in any of the processes, the specific heat capacity of the oil is,

### Choices

Choice (4) Response

a.

1700 JK-1 kg-1

b.

1800 JK-1 kg-1

c.

1900 JK-1 kg-1

d.

1500 JK-1 kg-1

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