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An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 117 km and with a period of 51.0 h. The asteroid is roughly spherical (unusual for such a small body) with a radius of 25.3 km.
a) Find the acceleration of gravity at the surface of the asteroid.
b) Find the escape velocity from the asteroid.
An amplifier supplies 5.0 Watts to a perfectly efficient loudspeaker at one end of a 10.0 cm diamter tube filled with air. What is the intensity of the sound at the other end of the tube
a candle is placed at a distance of 15 cm in front of a concave mirror of radius 40 cm. where is the image of the candle
74 L of an ideal monatomic gas is at an absolute pressure of 3 atm when the temperature is 25 C. How many moles of gas are there
what orientation of the coil allows current to flow? what happens as you rotate the windings 180 degrees from this
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 32.3 m/s. Find the airplane's acceleration
A 200 keV electron strikes a copper target and is brought to rest producing a single X-ray photon. What is the Compton scattering angle relative to the direction of the incident X-ray
Two spheres with uniform surface charge density, first with a radius of 7.0cm and the second with a radius of 4.8cm , What is the surface charge density on the first sphere
A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, What is the height of the tower
Find the peak magnetic field in an electromagnetic wave whose peak electric field is 200N/C
A charge of 1 uC accelerates through a potential difference of 200V. What is the change in the electric potential of the charge
A loaded railroad car of mass 6000 kg is rolling to the right at 2.0 m/s when it collides and couples with an empty freight car of mass 3000 kg, What is the velocity of the pair after the collision
Consider resistors R1 and R2 connected in series E R1 R2 and in parallel E R1 R2 to a source of emf E that has no internal resistance. How does the power dissipated by the resistors
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