हिंदी

1000 Tiny Mercury Droplets Coalesce to Form a Bigger Drop. in this Process, Temperature of The Drop - Physics

Advertisements
Advertisements

प्रश्न

1000 tiny mercury droplets coalesce to form a bigger drop. In this process, temperature of the drop _______ .

(A) increases

(B) may increase or decrease

(C) decreases

(D) does not change

Advertisements

उत्तर

(A) increases

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2016-2017 (July)

APPEARS IN

संबंधित प्रश्न

A metal sphere cools at the rate of 4°C / min. when its temperature is 50°C. Find its rate of cooling at 45°C if the temperature of surroundings is 25°C.


The dimensions of emissive power are ______.


The light from the Sun is found to have a maximum intensity near the wavelength of 470 nm. Assuming the surface of the Sun as a black body, the temperature of the Sun is _____________.

[Wien's constant b = 2 .898 x l0- 3mK]


Answer the following:

There were two fixed points in the original Celsius scale as mentioned above which were assigned the number 0 °C and 100 °C respectively. On the absolute scale, one of the fixed points is the triple-point of water, which on the Kelvin absolute scale is assigned the number 273.16 K. What is the other fixed point on this (Kelvin) scale?


The susceptibility of magnesium at 300K is 1.2 x 10-5. At what temperature will the susceptibility increase to 1.8 X 10-5?


The substance which allows heat radiations to pass through is _______.

(A) iron

(B) water vapour

(C) wood

(D) dry air


Does the temperature of a body depend on the frame from which it is observed?


Why do marine animals live deep inside a lake when the surface of the lake freezes?


Which of the following pairs may give equal numerical values of the temperature of a body?


If the temperature of a uniform rod is slightly increased by ∆t, its moment of inertia I about a line parallel to itself will increase by


A spinning wheel A is brought in contact with another wheel B, initially at rest. Because of the friction at contact, the second wheel also starts spinning. Which of the following energies of the wheel B increases?
(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal


A body A is placed on a railway platform and an identical body B in a moving train. Which of the following energies of B are greater than those of A, as seen from the ground?
(a) Kinetic
(b) Total
(c) Mechanical
(d) Internal


Which of the following pairs of physical quantities may be represented in the same unit?


Two bodies at different temperatures are mixed in a calorimeter. Which of the following quantities remains conserved?


The mechanical equivalent of heat ____________ .


If heat is supplied to a solid, its temperature

(a) must increase

(b) may increase

(c) may remain constant

(d) may decrease


A railway track (made of iron) is laid in winter when the average temperature is 18°C. The track consists of sections of 12.0 m placed one after the other. How much gap should be left between two such sections, so that there is no compression during summer when the maximum temperature rises to 48°C? Coefficient of linear expansion of iron = 11 × 10–6 °C–1.


A circular hole of diameter 2.00 cm is made in an aluminium plate at 0°C. What will be the diameter at 100°C? α for aluminium = 2.3 ×  10–5 °C–1.


A steel ball that is initially at a pressure of 1.0 × 10Pa is heated from 20°C to 120°C, keeping its volume constant.
Find the pressure inside the ball. Coefficient of linear expansion of steel = 12 × 10–6 °C–1and bulk modulus of steel = 1.6 × 1011 Nm–2.


‘An object contains more heat’- is it a right statement? If not why?


Explain the meaning of heat and work with suitable examples.


Temperature and Heat are ______


Our normal body temperature is ______.


Two objects are said to be in thermal contact if they can exchange heat energy.


One day in 1922, the air temperature was measured at 59°C in the shade in Libya ______.


Heat is measured in Celsius or centigrade.


Temperature in the form of energy.


Which formula gives the average kinetic energy per molecule of an ideal gas?


According to the Zeroth Law, if A is in thermal equilibrium with B, and B with C, then:


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×