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Q1. Far in space, where gravity is negligible, a 450 kg rocket travelling at 77 m/s fires its engines. The thrust force as a function of time with horizontal axis in 9 s increments. The mass lost by the rocket during these 25 s is negligible.
(a) What impulse does the engine impart to rocket?
(b) At what time does the rocket reach its maximum speed?
(c)What is the greatest speed?
Q2. A baseball is thrown straight up. The drag force is proportional to .In terms of, what is the y-component of ball's acceleration when its speed is half its terminal speed and it is moving up?
One of the tenets of the pseudoscience (i.e., "false science") of astrology is that, in some mysterious way, the positions of the planets at the time of the person's birth somehow influence the characteristics of that person.
The earth orbits the sun once per year at the distance of 1.50 x 1011 m. How long (in earth days) does it take for Venus to make one orbit
An FM radio station broadcasts an oscillating radio wave, What is the frequency of the oscillations in the radio transmitter
A tank of water sits at the edge of a table of height 2m. The tank springs a very small leak at its base, and water sprays out a distance of 1.4 m from the edge of the table. What is the water level h in the tank? (Assume the tank is open to the a..
A disk of radius 3.00 cm has a uniformly distributed charge of Q = 5.20 uC, Calculate the electric field on the perpendicular axis of disk
how far is this point horizontally from the end of the ramp. A skateboarder shoots off a ramp with a velocity of 6.2 m/s, directed at an angle of 61° above horizontal. The end of the ramp is 1.5 m above the ground.
A tank of 0.5 m3 volume contains compressed air. A valve is opened and air escapes with a velocity of 220 m/s through an opening of 100 mm2 area. Find the rate of change of density of the air in the tank at this moment
A 20 g bullet traveling at 300 m/s is shot into a 4.0 kg block at rest on a frictionless horizontal surface. What is the speed of the block right after shooting
Some cell walls in the human body have a layer of negative charge on the inside surface and a layer of positive charge of equal magnitude on the outside surface, Estimate the total electric-field energy stored in the wall of a cell of this size
q1. revolutionary war cannon with a mass of 2220 kg fires a 22.7 kg ball horizontally. the cannonball has a speed of
A standing wave is set up by reflecting radio waves from a large, flat metal dish. Where are the corresponding maxima in the magnetic field
A grating has exactly 7800 lines uniformly spaced over 2.63 cm, What is the expected angle for the third-order maximum of the green line
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