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A spacecraft is moving past Earth with a velocity of 0.7c. It launches a rocket that moves in the same direction as the spacecraft at a speed of 0.8c. What is the speed of the rocket relative to Earth?
A charge of -250e is uniformly spread through the volume of a sphere of radius 2.00 cm. What is the volume charge density in that sphere
A block starts from rest at the top of a 30.0° inclined frictionless plane and after travelling 1.00 m encounters a spring, how much would the block compress the spring
The absorption spectrum of an atom consists of the wavelengths 200 nm, 300 nm, and 500 nm. What wavelengths are seen in the atom's emission spectrum?
Lasers are used extensively in eye surgery to remove unwanted material from the eye or reshape the eye lens. If this energy is delivered to a spot on the eye that is 1.0 mm in diameter, what is the intensity during a pulse
Sinusoidal waves 5.00 cm in amplitude are to be transmitted along a string that has a linear mass density of 4.00 multiplied by 10-2 kg/m. find the highest frequency at which the source can operate
A car driving at 33 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the car going when the driver changed the rate of dec..
A bicycle whose tires have a diameter of .700 m accelerates from rest at a constant rate, Find the angular acceleration of the wheels
Four identical masses of 2.1kg each are located at the corners of a square with 2.0m sides. What is the net force on any one of the masses
An airplane driving at an angle of 30 degrees with the horizontal drops a bag of dans from an altitude of 800 m. The bagis observed to strike the groud 5 seconds after it releases.
A bullet is moving at a speed of 367 m/s when it embeds into a lump of moist clay. The bullet penetrates for a distance of 0.0621 m. Determine the acceleration of the bullet while moving into the clay. (Assume a uniform acceleration.)
A car of mass 150 kg is moving right with a velocity of 6 m/s and another one of mass 200 kg is moving left with a velocity of 4 m/s. find initial momentum of the system
The electric potential energy stored in the capacitor of adefibrillator is 65 J, and the capacitanceis 137 µF. What is the potential difference that exists across the capacitor plates?
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