Physics-
General
Easy
Question
How much heat energy is gained when 5 kg of water at 20oC is brought to its boiling point (Specific heat of water = 4.2 kJ kg-1c-1)
- 1680 kJ
- 1700 kJ
- 1720 kJ
- 1740 kJ
The correct answer is: 1680 kJ
Related Questions to study
Physics-
Absolute zero (OK) is that temperature at which
Absolute zero (OK) is that temperature at which
Physics-General
Physics-
The value of is
The value of is
Physics-General
Physics-
A force of 50 N acts on the block at the angle shown in the diagram. The block moves a horizontal distance of 3.0 m. Then the work done by this force
A force of 50 N acts on the block at the angle shown in the diagram. The block moves a horizontal distance of 3.0 m. Then the work done by this force
Physics-General
Physics-
A cannon after firing recoils due to
A cannon after firing recoils due to
Physics-General
Physics-
A jet engine works on the principle of
A jet engine works on the principle of
Physics-General
Physics-
Newton’s first law of motion describe the following
Newton’s first law of motion describe the following
Physics-General
Physics-
Wavelength of B.B.C. is 15 m, find the frequency of the waves broadcast by it if velocity of radio wave is 3 × 108 m s–1.
Wavelength of B.B.C. is 15 m, find the frequency of the waves broadcast by it if velocity of radio wave is 3 × 108 m s–1.
Physics-General
Physics-
The wavelength of sound in air is 100 cm. Its frequency is:
The wavelength of sound in air is 100 cm. Its frequency is:
Physics-General
Physics-
When the system is in equilibrium, the net force is
When the system is in equilibrium, the net force is
Physics-General
Physics-
A bullet is fired from a rifle. If rifle recoils freely, the K.E. of rifle is
A bullet is fired from a rifle. If rifle recoils freely, the K.E. of rifle is
Physics-General
Physics-
A body of mass m is moving in a straight line at a constant speed v. Its kinetic energy is K and the magnitude of its momentum is P. Which of the following relations is correct?
A body of mass m is moving in a straight line at a constant speed v. Its kinetic energy is K and the magnitude of its momentum is P. Which of the following relations is correct?
Physics-General
Physics-
The ratio of the angular speed of minutes hand and hour hand of a watch is
The ratio of the angular speed of minutes hand and hour hand of a watch is
Physics-General
Physics-
A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters is
A 150 m long train is moving with a uniform velocity of 45 km/h. The time taken by the train to cross a bridge of length 850 meters is
Physics-General
Maths-
Statement-1: A and B are two weak students in Mathematics and their chances of solving a problem correctly are 1/8 and 1/12 respectively. They are given a question and they obtain the same answer. If the probability of a common mistake is then the probability that the answer was correct is
Statement-2: If and are two mutually exclusive and exhaustive events with non-zero probability of a random experiment and E is any other event of the same experiment then
Statement-1: A and B are two weak students in Mathematics and their chances of solving a problem correctly are 1/8 and 1/12 respectively. They are given a question and they obtain the same answer. If the probability of a common mistake is then the probability that the answer was correct is
Statement-2: If and are two mutually exclusive and exhaustive events with non-zero probability of a random experiment and E is any other event of the same experiment then
Maths-General
Maths-
The probability of the simultaneous occurrence of two events A and B is p. If the probability that exactly one of A,B occurs is q, then
The probability of the simultaneous occurrence of two events A and B is p. If the probability that exactly one of A,B occurs is q, then
Maths-General