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A 330 N sphere 0.20 m in radius rolls,without slipping, 6.0 m down a ramp that is inclined at31° with the horizontal. What is the angular speed of the sphere at the bottom of the hill if it starts from rest?
In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80m/s^2. What is its initial velocity as it leaves the ground
A 38.0 kg child swings in a swing supported by two chains, each 3.04m long. The tension in each chain at the lowest point is 429N. Find out the child's speeds at the lowest point.
Estimate the time the ball is in contact with the floor to be 0.06 seconds. Compute the average force the floor exerts on the ball.
A spherical weather balloon is filled with hydrogen until its radius is 3.40 m. Its total mass including the instruments it carries is 13.0 kg. Find the buoyant force acting on the balloon, assuming the density of air is 1.29 kg/m3. N
An airtight container having a lid with negligible mass and an area of 101 cm2 is partially evacuated. what is the air pressure in the container before it is opened
A seagull flies at a speed of 10m/s directly into the wind. Knowing that it takes the bird 25 min to travel 8km relative to the earth, find the velocity of the wind. How long will it take the seagull to travel a distance of 12km with the wind?
A 5.00g bullet is fired horizontally into a 1.30kgwooden block resting on a horizontal surface. What was the initial speed of the bullet
a 10-cm-long thin glass rod uniformly charged to 13.0 ncand a 10-cm-long thin plastic rod uniformly charged to
A light ray travels through medium #1 and crosses a boundary into water at an indicent angle of 21.8 degrees. what is the energy of one photon of this light
We wish to coat flat glass (n 1.50) with a transparent material (n 1.25) so that reflection of light at wavelength 600 nm is eliminated by interference. What minimum thickness can the coating have to do this
Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 2.4 cm, Find the net force acting on particle 3 due to the presence of the other two particles
a circular coil having 19 turns and a radius of r 19.2cm carries a current of 3.30a. it is placed in a uniform
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