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During the Apollo lunar explorations of the late 1960s and early 1970s, the main section of the spaceship remained in orbit about the Moon with one astronaut in it while the other two astronauts descended to the surface in the landing module. If the main section orbited about 50 miles above the lunar surface, determine that section's centripetal acceleration.
Referring to the above question, determine the a) the gravitational potential energy, b) the total energy, and c) the energy needed to "escape" the Moon for the main section of the lunar exploration mission in orbit. Assume the mass of this section is 5,000 kg.
A football is kicked at ground level with a speed of at an angle of 35.0º to the horizontal. How much later does it hit the ground
A kid picks up a toy of mass 139g, from the floor. The kid lifts the toy 42.2cm above the floor. How much work does the kid do on the toy
Design a circuit that will store data from four binary sensors (presenting either a high or low value) when an enable pulse from a digital source first goes high. Assume that the enable input is normally low and the pulse is high for 1 sec.
an ideal gas for which cv3r2 is the working substance of a carnot engine. during the isothermal expansion the volume
A bicycle wheel is rotating at 49 when the cyclist begins to pedal harder, giving the wheel a constant angular acceleration of 0.42. How many revolutions does the wheel make during this time
a disk is spinnning at a rate of 10 rad/s. a second disk of the same mass and shape, what is the final angular velocity of the two disks
A narrow glass tube, open at one end, closed at the other, is 40cm long. Determine the frequency of the moving sound source
What is the period of a simple pendulum with mass of 5 kg displaced 4o with a string length of 0.45 m near the Earth's surface
By what factor must your blood pressure increase to compensate for a 5 % narrowing in your blood vessels?
Assume that you release a small ball from rest at a depth d below the surface in a pool of water and the ball rises and because the ball emerges from the water it shoots up a distance 3d above the water.
In a large steam engine, a horizontal rod is attached to a flywheel by means of a frictionless pivot 95 cm from the wheel's axis. what is the torque about the wheel's axis
A 5.1- kg concrete block rests on a level table. A 3.1- kg mass is attached to the block by a string passing over a light, frictionless pulley. If the acceleration of the block is gauged to be 1.1 m/s2, what is the coefficient of friction among the b..
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