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A solid, uniform, spherical boulder starts from rest and rolls down a 50.0-m high hill. The top half of the hill is rough enough to cause the boulder to roll without slipping, but the lower half is covered with ice and there is no friction. What is the translational speed of the boulder when it reaches the bottom.
The star Mizar in Ursa Major is a binary system of stars of nearly equal magnitudes. What is the minimum diameter of the pupil
The temperatre result in each measurement are listed below, write down the formula for mean and calculate the temperature mean value
A penny has a mass of 2.50 g, a diameter of 19.55 mm, find the density of the material from which the penny is made
A converging lens with focal length 40 cm is placed 80 cm in front of a convex mirror with focal length -40 cm. An object is placed 60 cm in front of the lens. Where is the final image?
A space probe is fired as a projectile from the Earth's surface with an initial speed of 1.78 x 10^4 m/s. What will its speed be when it is very far from the Earth
A positively charged particle of mass 6.60 10-8 kg is traveling due east with a speed of 35 m/s and enters a 0.39 T uniform magnetic field. What is the magnitude of the charge of the particle
A proton moving at a speed of 3.8 ´ 106 m/s cutsacross the lines of a magnetic field at an angle of 30°. The strength of the field is 0.25 ´ 10-4 T. What is the magnitude of the force acting on the proton?
What is the range of frequency of the light emitted by the hydrogen atom
Objects of masses m1 = 4.00 kg and m2 = 9.00 kg are connected by a light string that passes over a frictionless pulley, Determine the acceleration of each object
A toy car with a mass of 120 g moves to the right with a speed of 0.62 m/s. A small child drops a 21.0-g piece of clay onto the car, What is the change in speed of the car
A cell phone battery uses chemistry to create a charge separation between the terminals (anode and cathode). How many free electrons does the battery contain
q1. a spaceship of mass 2.50806 kg is to be accelerated to a speed of 0.820c.a what minimum amount of energy does this
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