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A certain mass of a gas containing 43.5cm³ at 15°C is heated at constant pressure to 85°C. It then occupies a volume of 54cm³. Calculate the cubic expansivity.
You are dragging a heavy box with a mass of 90.0 kg across the floor at a constant velocity with a horizontal force of 300.0 N. a) Calculate uk b) A friend tries to assist you by pushing up on the box with a force of 100.0 N (up) . How much less force will you need to exert to keep the box moving at a constant velocity ?
A student has a mass of 49.2 kg and is sitting on a seat of a rollercoaster. The ride makes the seat move up and down. Determine the normal force acting on the student if they are: a) moving at a constant velocity of 10.0 m/s b) accelerating 2.1 m/s ^ 2 (down)
A cart of mass m1=0.24kg moves on a linear track without friction with an initial velocity of 0.17 m/s. It collides with another cart of mass m2=0.68 kg that is initially at rest. The first cart carries a force probe that registers the magnitude of the force exerted by one cart on the other during the collision.
Find the velocity of each cart after the collision.
in a scene in an action movie, a stuntman jumps from the top of one building to the top of another building 4.0 m away. after a running start, he leaps at a velocity of 5.0 m/s at an angle of 15* with respect to the flat roof. will he make it to the other roof, which is 2.5 m shorter than the building he jumps from?
Two different masses M1 = 2kg and M2 = 3kg are attached to a rope which is placed over a pulley. Find the acceleration, tension and speed at which the body crosses the pulley.
Polarization of a wave is
A. direction of electric field
B. direction of magnetic field at some fixed point in space
C. either (a) or (b)
D. none of the above
. A vertical wire of 1 meter length carries a current of 1 A at 10 MHz. The total radiated power is nearly
A uniform plane wave travelling in air is incident on the plane boundary between air and another dielectric medium with εr = 4. The reflection coefficient for the normal incidence is
