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A spaceship is measured to be 186 m long while at rest relative to the observer. If this spaceship now flies by the observer with a speed 0.966 times the speed of light, what length does the observer measure?
A car with a mass of 2000kg is moving with a speed of 55 mph and enters a circular turn at level ground. What is the angular velocity of the car
A sledge loaded with bricks has a total mass of 17.0 kg and is pulled at constant speed by a rope inclined at 19.9° above the horizontal. What is the mechanical energy lost due to friction
an object can be hung from a string with a linear mass density of 0.00200 kg/m that passes over a light pulley. What is the frequency of the vibrator
An object is being pushed up an inclined plane with a constant force F = 100. N. The plane makes an angle of 30.0° with respect to the horizontal, What is the mass of the object
One cubic meter (1.00 m3) of aluminum has a mass of 2.70 103 kg, and the same volume of iron has a mass of 7.86 103 kg. Find the radius of a solid aluminum sphere that will balance a solid iron sphere of radius 1.24 cm on an equal-arm balance.
What focal length does the lens need. Find out the electrostatic force exerted on one sphere by the other.
Suppose you pour water into a container until it reaches a depth of 12 cm, What is the pressure at the bottom of the container
A horizontal power line of length 52 m carries a current of 1.4 kA, find direction of the magnetic force on the power line
A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr) for every 7.70 1011 stable carbon atoms. Find the number of carbon atoms in the sample
The electric field strength is 2.40 x 10^4 N/C inside a parallel-plate capacitor with a 1.40 mm spacing, What is the electron's speed when it reaches the positive plate
q1. a 1.2 kg mass attached to a spring oscillates with amplitude of 6.3 cm and a frequency of 1.1 hz. what is its
A bullet of mass 10.1 g is fired into an initially stationary block and comes to rest in the block. Find the initial speed of the bullet
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