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A rocket, which is in deep space and initially at rest relative to an inertial reference frame, has a mass of 59.6 × 105 kg, of which 7.27 × 105 kg is fuel. The rocket engine is then fired for 450 s, during which fuel is consumed at the rate of 330 kg/s. The speed of the exhaust products relative to the rocket is 4.71 km/s.
(a) What is the rocket's thrust? After the 450 s firing, what are
(b) the mass and
(c) the speed of the rocket?
A football quaterback runs 15.0 m staright down the playing field in 2.50s. what are the average velocities for the three intervals
The telescope at a small observatory has objective and eyepiece focal lengths of 16.0 m and 12 cm, respectively. determine angular magnification of the telescope
How much time is neccesary to stop the crate. A block with mass m = 5.5 kg slides down an inclined plane of slope angle 10.9 ° with a constant velocity. It is then projected up the same plane with the initial speed 3.85 m/s. How far up the incline ..
An interstate highway has been built through a neighborhood in a city. In the afternoon, the sound level in an apartment in the neighborhood is 95.0 dB as 105 cars pass outside the window every minute. Late at night, the traffic flow is only six c..
The string changes from horizontal to vertical as it passes over a solid pulley of diameter 6.0cm. The pulley is free to turn on a fixed smooth axle. The vertical section of the string supports a 400 g object. The string does not slip at its conta..
The gravitational force between two masses M and m seperated by a distance r is 40 N. What is the new force when this distance is halved
A 250 N force is applied at a37° angle to the surface of theend of a square bar. The surface is 4.00 cm on a side. What is the shear stress on the bar
When responding to sound, the human eardrum vibrates about its equilibrium position. What is the maximum acceleration of the eardrum
A circular wheel has a radius R = 0.45 + or - 0.02 m. The wheel is observed to be rotating uniformly with period T = 2.00 +or- 0.05 s. Compute the frequency with which the wheel spins
Find out the shear strain that results if a force of magnitude 5.00×105 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to the bottom face of the plate as s..
A crate of mass 150.0 kg lies at rest on a horizontal storage room floor. The coefficient of static friction between crate and floor is 0.72, and the coefficient of kinetic friction is 0.85. (You may suppose g = 10.0m/s2).
1000 kg of seawater at 17.5 C and salinity of 3 percent is mixed with 500 kg of pure water with initial temperature 5 C, Determine the final temp C and salinity % of the mixture?
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