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As a spacecraft approaches a planet, the rocket engines on it are fired (turned on) to slow it down so it will go into orbit around the planet. The spacecraft's mass is 2,425 kg and the thrust (force) of the rocket engines is 385 N. If its speed must be decreased by 1,159 m/s, how long (in minutes) must the engines be fired? (Ignore the change in the mass as the fuel is burned.)
A woman stands on a bathroom scale in a motionless elevator. When the elevator begins to move, the scale briefly reads only 0.75 of her regular weight. Calclate the acceleration of the elevator
An L-C circuit containing an 83.0-mH inductor and a 1.70-nF capacitor oscillates with a maximum current of 0.730A.calculate the energy stored in the inductor after 2.50ms of oscillation
If the maximum acceleration the vehicle’s brakes are capable of is −6 m/s2, illustrate what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer?
Two negative, equally charged drops of water, 0.80 mm apart, exert an electrostatic force of 78.5 x 10-9 N on each other. Determine the net charge on each drop.
Two tanks are engaged in a training exercise on level ground. The first tank fires a paint-filled training round with a muzzle speed of 240m/s at an angle 13.4, Find the distance between the tanks when the round was first fired
An ocean liner leaves New York City and travels 39.0° north of east for 140 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the following directions.
A wire coil is oriented so that its plane is perpendicular to a magnetic field of 0.58 T initially pointing to the left. What is the average induced emf, if the diameter of the coil is 49 cm
An eagle is flying horizontally at 5.7 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?
Integrated circuits are manufactured in vacuum chambers in which the air pressure is 6.00×10?11 mm of Hg, determine the mean free path of a molecule
Light from an argon laser strikes a diffraction grating that has 5 310 grooves per centimeter. calculate vthe wavelength of the laser light
A 5.78 cm long rod in the shape of a rectangular solid has cross section dimensions 28.7 mm x 42.6 mm. What is the current in the block
A block of iron 3.00 kg is charged positively with the net charge of .010C. find the fraction of the electrons removed from thus iron
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