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A NASA mission to update the electronics on a circular orbiting space station has required the work of four astronauts. The astronauts have been docked to the space station which is orbiting the Earth with a speed v = 2.18 km/s, for 8 days. The next mission is to travel away from Earth to Mars. In order to do this, the astronaut's shuttle must escape the gravity of Earth by firing it's thrusters. What speed, vesc, must the astronaut's shuttle attain to escape the Earth? The radius of the Earth is RE = 6.37 × 106 m, the mass of the Earth ME = 5.98 × 1024 kg, the acceleration due to gravity on the surface of the Earth g = 9.81 m/s2 and the gravitational constant G = 6.67 × 10-11 N·m2/kg2.
A television repairman needs a 100 ohm resistor to repair a malfunctioning set. He is temporarily out of resistors of this value. How can he obtain the desired resistance using the resistors he has on hand
Jill's camera can photograph objects sharply 24 cm away but not closer. Find the focal length of the Jill's lens
A wheel rotating with a constant angular acceleration turns through 24 revolutions during a 6 s time interval. Its angular velocity at the end of this interval is 18 rad/s. What is the angular acceleration of the wheel? Note that the initial angular ..
A 35-kg child rides a playground merry-go-round, standing 1.6 m from its center. What was the distance travelled by the child during this time
The output voltage of an AC generator is given by ?v = (200 V) sin (70?t). The generator is connected across a 19.0-? resistor. Find the power delivered to the resistor
An object of mass "m" is thrown up an inclined plane of angle "theta" with an initial velocity "v knot". If the motion is resisted by retarding force Fr=-kv (where k is a force coefficient and v the velocity of the object.)
A potential difference of 80 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
two parallel plates each of area 6.27 cm2 are separated by 3.60 mm. the space between the plates is filled with air. a
How fast is the top of the tree moving (in m/s) just before it hits the ground? Model the tree as straight, rigid rod, and ignore friction and air resistance.
Two boxes are connected to each other. The system is released from rest and the 2.00kg box falls through a distance of 1.00m. what is the tension in the connecting string
The distance to a star is approximately 7.60 1018 m. If this star were to burn out today, in how many years would we see it disappear? How long does it take for sunlight to reach Jupiter?
A sealed cubical container 22.0 cm on a side contains three times Avogadro's number of molecules at a temperature of 20.0°C
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