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Question: Two meteoroids are heading for earth. Their speeds as they cross the moon's orbit are 1.0 km/s.
(A) The first meteoroid is heading straight for earth. What is its speed of impact? ______ km/s ?
(B) The second misses the earth by 4000 km. What is its speed at its closest point? ______ km/s ?
A dolphin leaps out of the water at an angle of 36.1 ° above the horizontal. Find the magnitude of the vertical component of the velocity
A portable electric heater uses 22 A of current. The manufacturer recommends that an extension cord attached to the heater, What is the smallest radius of copper wire that can be used in the extension cord
A rope goes over a circular pulley with a radius of 7.5 cm. If the pulley makes four revolutions without the rope slipping, what length of rope passes over the pulley
A 30.0g ball rolls around the 40.0cm diameter hemishperical track at 60.0rpm. Assume rolling friction is negligible. Determine the ball's linear velocity
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. If the original star rotated once in 35 days, find the angular speed of the neutron star
what is the velocity of a beam of electrons that go undeflected when passing through perpendicular electric and
A passenger tries to estimate the acceleration of a train by measuring the angle between the draw string of a window curtain and the vertical direction. What is the acceleration of the train
A ball is kicked with an initial velocity of 16 m/s in the horizontal direction and 14 m/s in the vertical direction. What maximum height is attained by the ball
A 6cm diameter horizontal pipe gradually narrows to 4cm. Whenwater flows throught this pipe at a certain rate, What is the volume rate of flow
A uniform electric field of magnitude E = 500 N/C makes an angle of ? = 61.0° with a plane surface of area A = 3.80 m2, Find the electric flux through this surface
The cylindrical beam of a 80.0 mW laser is 0.80 cm in diameter. What is the rms value of the electric field
Two charges of equal magnitude exert an attractive force of 5.0 x 10-4 N on each other. If the magnitude of each charge is +3.0 uC, how far apart are the charges
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