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Heat Thermodynamics

Solution for Class 11, Physics, Heat Thermodynamics

Views: 5,880

Which of the following is a vector quantity?

Time
Speed
Distance
Acceleration

Topic:

Heat & Thermodynamics

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Views: 5,843

At the room temperature the velocity of sound in

O_{2}

V

. Then in mixture of

H_{2}

O_{2}

gas the speed of sound at same temprature:

will be less than V.
will be more than $V$
will be equal to $V$
nothing can be said

Topic:

Heat & Thermodynamics

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Views: 5,563

The heat capacity of a body depends on

Internal energy of each body

Topic:

Heat & Thermodynamics

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Views: 5,686

The heat capacity of a body depends on:

the heat given
the temperature raised

Topic:

Heat & Thermodynamics

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Views: 5,190

13.5

An air bubble of volume

1.0

m miscs fores it grow when it reaches the surface. which is at a temperature of

3 5^{\circ} C

? 13. 8 Estimate the total number of air molecules (inclusive of oxygen, nitrogen, water vapour and other constituents) in a room of capacity

25.0 m^{3}

at a temperature of

2 7^{\circ} C

1 atm

pressure. 13.7 Estimate the average thermal energy of a helium atom at (i) room temperature

l e f t (27^{\circ} C i g h t)

, (ii) the temperature on the surface of the Sun

(6000 K)

, (iii) the temperature of 10 million kelvin (the typical core temperature in the case of a star).

Topic:

Heat & Thermodynamics

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Views: 5,610

If in the given reaction

3 1_{2} + OH i g h t a rro w 1 O_{3}^{-} + 5 1^{-}

2 moles of lodino are taken, then the ratio of iodate and iodide lons formed in the alkaline medium is

$1 : 5$
$3 : 5$
$5 : 1$
$5 : 3$

Topic:

Heat & Thermodynamics

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Views: 5,153

20 gm

- 1 0^{2} C

13.8 g

$76.2 g$
$65.6 g$

Topic:

Heat & Thermodynamics

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Views: 5,775

α

of a material is

10 X 1 0^{- 6} /^{0} c

, ratio of its densities at

2 0^{\circ} C

4 0^{\circ} C

$1.006$
$1.0006$
$1.06$
$0.9998$

Topic:

Heat & Thermodynamics

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Views: 5,239

1) What is the solid angle subtended by the moon at any point of the Earm. given the diameter of the moon is

3474 km

and its distance from the Earth

3.84 \times 1 0^{8} m

Topic:

Heat & Thermodynamics

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Question 10

Views: 5,578

a c d o t b = ∣ a \times b ∣

, then the angle

θ

a

b

$6 0^{\circ}$
$4 5^{\circ}$
$7 5^{\circ}$
$9 0^{\circ}$

Topic:

Heat & Thermodynamics

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Question 11

Views: 5,050

A liquid is under streamline flow through a horizontal pipe of non uniform cross-sectional area. If the volume rate of flow at a crosssection of area

a

V

, then volume rate of flow at a different cross-section of area

\frac{a}{2}

$\frac{V}{2}$
$2 V$
$\frac{V}{4}$
$V$

Topic:

Heat & Thermodynamics

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Question 12

Views: 5,970

A liquid is under streamline flow through a horizontal pipe of non uniform cross-sectional area. If the volume rate of flow at a crosssection of area

a

V

, then volume rate of flow at a different cross-section of area

\frac{a}{2}

$\frac{V}{2}$
$2 V$
$\frac{V}{4}$
$V$

Topic:

Heat & Thermodynamics

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Question 13

Views: 5,289

A uniform metal ring with centre

C

A

B

maintained at two different constant temperatures. The angle

A CB

θ

. If it is known that for

θ = 18 0^{\circ}

, rate of heat flow from

A

B

1.2 W

, the rate of heat flow for

θ = 9 0^{\circ}

$0.6 W$
$0.9 W$
$1.6 W$
$1.8 W$

Topic:

Heat & Thermodynamics

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Question 14

Views: 5,134

9. A hole is drilled in a copper sheet. The diameter of the hole is

4.24 cm

27. 0^{\circ} C

. What is the change in the diameter of the hole when the sheet is heated to

227^{\circ} C

? Coefficient of linear expansion of copper

= 1.77 \times 1 0^{- 5}^{\circ} C^{- 1} .

Topic:

Heat & Thermodynamics

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Question 15

Views: 5,210

A closed container is fully insulated from outside. 27 One half of it is filled with an ideal gas

X

separated by a plate

P

from the other half

Y

which contains a vacuum as shown in figure. When

P

X

Y

. Which of the following statements is correct?

No work is done by $X$
$X$ decreases in temperature
$X$ increases in internal energy
$X$ doubles in pressure

Topic:

Heat & Thermodynamics

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Question 16

Views: 5,988

In case of horizontal projection from certain height, the formula for time of flight is

$\frac{2 u}{g}$
$\frac{u s i n θ}{g}$
$\frac{2 u s i n θ}{g}$
$\frac{2 h}{g}$

Topic:

Heat & Thermodynamics

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Question 17

Views: 5,270

In above case of projection, the vertical component of initial velocity is .

$u sin θ$
$u$
$u cos θ$
0

Topic:

Heat & Thermodynamics

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Question 18

Views: 5,157

Based on horizontal projection from a height, choose the false statement from the following.

Acceleration due to gravity is zero in horizontal direction
When body touches the ground after projection, its vertical displacement is $\frac{1}{2} g t^{2}$
When body touches the ground after projection, its horizontal displacement is $\frac{1}{2} g t^{2}$
Vertical component of velocity is $v_{y} = gt$

Topic:

Heat & Thermodynamics

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Question 19

Views: 5,770

(3.) In the reaction,

A + B i g h tl e f t ha r p oo n s C + D

The initial concentration of

A

is double the initial concentration of

B

. At equilibrium the concentration of

B

was found to be one third of the concentration of

C

. The value of equilibrium constant is

$1.8$
$1.008$
$0.0028$
$0.08$

Topic:

Heat & Thermodynamics

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Question 20

Views: 5,014

Assuming the gas to be ideal the work done on the gas in taking it from A to B is :- [AIEEE-2009]

$400 R$
$500 R$
$200 R$
300

Topic:

Heat & Thermodynamics

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