Calculate the force of gravity between a human child
Calculate the force of gravity between a human child (mass = 28 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its closest to Earth (distance = 8. 1010 m).
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An athlete at the gym holds a 1.5 steel ball in his hand. His arm is 70 long and has a mass of 4.0 .What is the magnitude of the torque about his shoulder if he holds his arm straight out to his side, parallel to the floor?
Capacitors C1 = 6.11 uF and C2 = 1.54 uF are charged as a parallel combination across a 291 V battery. The capacitors are disconnected from the battery and from each other. They are then connected positive plate to negative plate and negative plat
As they approach shore, however, the water depth decreases and the waves slow down. This can result in an increase of amplitude to as much as 37 m or more.)
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 70.0 cm, what was the speed of the bullet at impact with the block?
A hurricane at latitude 30° N has a velocity within 25 km of the eye of 50m s-1, and a velocity around the outer edge (radius 400km) of 10 m s-1. By calculating the pressure gradient and the controlling forces in each case, discuss whether the
A certain superconducting magnet in the form of a solenoid of length 0.30 m can generate a magnetic field of 13.0 T in its core when its coils carry a current of 105 A. The windings, made of a niobium-titanium alloy, must be cooled to 4.2 K. Find
A sports car moving at constant speed travels 90 m in 5.2 s. If it then brakes and comes to a stop in 4.0 s, what is its acceleration? Express the answer in terms of g's, where g = 9.80 m/s2.
The distance between their centers will be twice that. What will be the total kinetic energy of both particles an instant before they touch?
Standing on a sidewalk, you hear a frequency of 560 Hz from a siren of an approaching ambulance. After the amblance passes, you hear a frequency of 480 Hz. Find the speed of the ambulance.
Two 9.0 cm diameter charged disks face each other, 20 cm apart. Both disks are charged to - 80 nC. What is the electric field strength at the midpoint between the two disks?
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