A non-conducting vessel contains a liquid of mass 70 g at 25º C. Another 70.0g of the same liquid at 35ºC is quickly poured into the vessel. Determine the final temperature of the mixture
See more
2024
The maximum displacement of particles from equilibrium position in a wave motion is known as
See more
2024
Four pieces of constantan wire, marked E, F, G, and H, each of length 1.0m, are at the temperature. Their respective diameters are 1 mm, 2 mm, 6 mm, and 10 mm. Which wire has the highest resistance?
See more
2024
The correct sequence of ionization power of alpha particle, gamma ray, and beta particle respectively is
See more
2024
Which of the following modes is the most economical method of transmitting electrical power over a long distance?
See more
2024
The phenomenon used for explaining the formation of a rainbow in the sky is
See more
2024
The main difference between X-rays and gamma rays is in their
See more
2024
Atmospheric pressure decreases with an increase in altitude because:
See more
2024
Which of the following statements about a projectile is not correct?
See more
2024
The inside portion of a hollow metal sphere of diameter 20 cm is polished. The portion will therefore form a
See more
2024
In which of the following devices is the thermal expansion considered a disadvantage?
See more
2024
A capacitor described as a mica capacitor has
See more
2024
Which of the following terms has different dimension from the others?
See more
2024
The depolarizing agent in a Leclanché cell is
See more
2024
A boy of mass 40 kg jumps off a stationary skateboard and moves horizontally with a speed of 1.5 m/s while the skateboard moves in the opposite direction with a speed of 20 m/s. Calculate the mass of the skateboard.
See more
2024
The diagram above illustrates two boxes P and Q of masses 27.3 kg and 6.2 kg respectively on a smooth horizontal surface. If a force F of 150 N is applied to the combined forces, calculate the acceleration.
See more
2024
An object 2.0 cm high is placed at the radius of curvature of a concave mirror such that it is perpendicular to the principal axis of the mirror. Determine the height of the image.
See more
2024
Light of energy 1.12 x 10\(^{-18}\) J is incident on a metal of ejected electrons with maximum energy of 8.0 x 10\(^{-19}\)J. Calculate the threshold frequency of the metal. [h = 6.626 x 10\(^{-34}\)Js]
See more
2024
A body of mass, m is projected vertically upward with a velocity, y. At what position will the potential energy be maximum?
See more
2024
A 2 μF capacitor is connected directly across a 150 V\(_{rms}\), 60 Hz A.C source. Calculate the r m s value of the current.