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Q1. A 500.0 g pot of water at room temperature (20.0 degrees C) is placed on a stove. How much heat is required to change this water to steam at 100.0 degrees C?
Q2. A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 12% of his body weight?
Q3. A gymnast of mass 56.0 {rm kg} hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 {rm m/s^2} for the acceleration of gravity.
A camera with interchangeable lenses is used to photograph a distant object. The angular size of the object is 19 degrees. What is the longest focal length lens
A 70.0cm wire of mass 8.20g is tied at both ends and adjusted to a tension of 41.0N. When it is vibrating in its second overtone, find the frequency at which it is vibrating
The flywheel of an engine has a moment of inertia 3.00 {rm kg} cdot {rm m} ^ {2} about its rotation axis. What is its final kinetic energy.
Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. How much charge flows between the ground and the cloud
What is the potential energy of this group of charges. The coefficient of kinetic friction between the crate and the floor is 0.25. Find the acceleration of crate.
A sound wave generated by a source of frequency 440 Hz is moving through 25 oC air. What is the wavelength of the sound wave inside the steel
A light spring-gun projectile launcher is mounted on an 0.393 kg air track glider. What is the speed of the air-track glider after the gun is fired
The nucleus of a hydrogen atom is a single proton. The radius of a proton is approximately 1 fm. What fraction of a hydrogen atom is occupied by the nucleus
questionone end of a spring is attached to ceiling and it is hanging straight down with a relaxed length l0. it has a
A ball of mass (m) 0.5 kg is attached to the end of a string having length (L) 0.5 m. The maximum possible value of angular velocity of ball is
A small positively charged sphere of mass 4.68 g and charge +72 micro C is suspended horizontally in static equilibrium, find the magnitude of the tension in the horizontal string
Two parallel wires separated by 4.3 cm repel each other with a force per unit length of 1.6 multiply.gif 10-4 Nm. Find the current in the other wire
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