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Vanguard 1, launched in 1958, is the oldest human artefact/satellite in orbit. It weighs 1.47 kg and orbits the Earth every 134.2 minutes. At its closest distance it is 654 km from the surface of the Earth. Assume that it is in a circular orbit and due to a collision with some space junk it loses 20% of its velocity.
a) Calculate its initial speed.
b) Calculate the initial energy of the satellite-Earth system.
c) Calculate the energy of the satellite-Earth system after the collision.
d) Explain why the satellite loses altitude and spirals into the Earth after the collision.
Two slits separated by a distance of d = 0.11mm are located at a distance of D = 660mm from a screen. The screen is oriented parallel to the plane of the slits. The slits are illuminated by a coherent light source with a wavelength of lambda = 536..
q1. a driver in a car travelling at a speed of 58.0 mih sees a deer 126 m away on the road. calculate the minimum
A motor has coils with a resistance of 28 and operates from a voltage of 241 V. When the motor is operating at its maximum speed, the back emf is 141 V. Find the current in the coils when the motor has reached maximum speed
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A disk of radius R and mass M = 10 g is rotating freely about a fixed axis through its center with angular velocity w = 11 rad/s. A spider of mass m = 0.5 g descends onto the disk and goes along for the ride. The moment of inertia of the disk is I..
In the Bohr theory of the hydrogen atom, an electron,oves in a circular orbit about a proton, where the radius of the orbit is 9.51 A. find the electrostatic force between the two
A car is parked at the top of a 50 {\rm m}-high hill. It slips out of gear and rolls down the hill. How fast will it be going at the bottom
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A skier slides down along a frictionless snow slope starting from rest at point A with elevation hA = 84 m. Ignore air resistance. Find the speed of the skier at point B with elevation hB = 21 m and point C with elevation hC = 62m
A pendulum is constructed from a thin, rigid, and uniform rod by a small sphere attached to the end opposite the pivot. This arrangement is a good approximation to a simple pendulum (period =3.72 s), because the mass of the sphere (lead) is much grea..
The velocity of the transverse waves produced by an earthquake is 4.77 km/s, while that of the longitudinal waves is 8.5383 km/s. How far away was the earthquake
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