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A 0.2kg toy car rolls down ramp. If the car started from rest at a height of 0.30m, what is its speed at the bottom of the ramp? Incorrect: Your answer is incorrect. At the bottom, it hits another stationary car with equal mass. The two cars have Velcro and stick together. At what speed do the two cars move after the collision?
A perfectly reflecting flat mirror is uniformly illuminated by light striking it perpendicularly. Calculate the intensity of the light
The mass of the blue puck shown below is 20.0% greater than the mass of the green puck. Find the speeds the pucks have after the collision if half the kinetic energy of the system becomes internal energy during the collision
A science-fair radio uses a homemade capacitor made of two 45 cm by 45 cm sheets of aluminum foil separated by a 0.30-mm-thick sheet of paper, What is its capacitance
A frictionless pulley (I=1/2MR^2) has a mass of 2.50kg and a radius of 20.0cm. how much kinetic energy does the stone have
A hollow cylinder (hoop) is rolling on a horizontal surface at speed 4.3 when it reaches a 11incline. How far up the incline will it go
Two tiny conducting spheres are identical and carry charges of -16.6C and +56.3C, Determine the magnitude of the force that each sphere now experiences
A person's body is covered with 1.69 m2 of wool clothing. The thickness of the wool is 2.12 × 10-3 m. How much heat per second does the person lose due to conduction
A life preserver made of Styrofoam is designed to support a person weighing 575 N, with 80% of the body and 90% of the preserver submerged, Find the volume of Styrofoam required
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
To initiate a nuclear reaction, an experimental nuclear physicist wants to shoot a proton into a ^12 C nucleus. With what speed must the proton be fired toward the target
A student is reading material written on a blackboard. Her contact lenses have a refractive power of 57.50 diopters; the lens-to-retina distance is 1.750 cm. How far (in meters) is the blackboard from her eyes
How many 95W light bulbs can you use in a 120V circuit without tripping a 17A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each light bulb is V.)
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