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A rocket is fired straight up and accelerates upward at 12 m/s2 for 18 seconds. The rocket then runs out of fuel and coasts still going up. Ignore any air resistance effects on the rocket and use -9.8 m/s2 for the local acceleration due to gravity. a) What is the rocket’s maximum altitude? b) At the maximum height the rocket ejects a 55.0 kg scientific package which falls straight down with an average constant retarding force of 175 N. What is the package’s speed when it hits the ground?
A toy cannon uses a spring to project a 5.31-g soft rubber ball. The spring is originally compressed by 5.04 cm and has a force constant of 7.96 N/m. At what point does the ball have maximum speed
Monochromatic light of wavelength 500 nm is incident normally on a grating. If the third-order maximum of the diffraction pattern is observed at 32.0°, how many total number of maxima can be seen?
The sound level 23 m from a loudspeaker is 65 dB. What is the rate at which sound energy is produced by the loudspeaker
a proton moves vertically upward perpendicular to a uniform magnetic field and deflects to the right as you watch it. What is the direction of the magnetic field
What was the temperature of the water before the insertion of the thermometer.
A 300g ball on a 70cm -long string is swung in a vertical circle about a point 200 cm above the floor, What was the tension in the string an instant before it broke
A pion decays into a muon and a neeutrino. In the rest frame of the pion, the muon always has a speed of .507c. what will be the speed of the muons in the lab fram
A hydrogen atom initially in its ground state (n=1) absorb a photon and ends up in the n=3 state. what photon energies could the atom emit
An 840 kg car needs to round a level curve with a radius of 23m.The driver wants to proceed at 56 kph. How much work does the friction force do on the car
A car wheel with a moment of inertia of 7.85 kg.m^2 is accelerating from 2160 rpm to 5040 rpm in a time of 10.0s. calculate The work done in raising the rotation frequency
A rectangular loop of wire carrying a 4.0-A current and with certain dimensions is placed in a magnetic field of 0.60 T. What is the area of this wire
A gymnast of mass 62.0 hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch.
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