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(a) A hollow, conducting spherical shell, of radius 3.50 cm, has charge ?9.14×10?5 C. What is the strength of the electric field 2.50 m from the center of the sphere?
(b) What is the direction of the field?
(c) A solid conducting sphere of the same radius has charge +9.14×10?5 C. What is the strength of the electric field 2.50 m from the center of the sphere?
(d) What is the direction of the field?
A car travelling at 105 strikes a tree. The front end of the car compresses and the driver comes to rest after travelling 0.85. What was the magnitude of an average acceleration of the driver during the collision? State the answer in terms of "'s,..
Honeybees acquire a positive charge while flying through the air. The rapid motion of the wings through the air provides the "friction" to strip charges off the bee, find the strength of the electrostatic force on the pollen grain
You attach a meter stick to an oak tree, such that the top of the meter stick is 2.47 meters above the ground. how high above the ground was the acorn before it fell
An airplane flies due west at a velocity of 645 kilometres per hour (km/h). The wind blows from the north at a velocity of 125 kilometres per hour (km/h). Find the plane resultant velocity?
A vertical tube open at the top contains 5.2 cm of oil (density 0.82 g/cm^3) floating on 5.2 cm of water. Find out the gauge pressure at the bottom of the tube.
q1. a man pulls a crate of mass 75.0 kg across a level floor. he pulls with a force of 180.0 n at an angle of 26.0deg
Suppose 28.5 kg of 87.5°C water is placed in contact with 28.5 kg of 11°C water. What is the change in heat (in J) of the hot water
1.a 0.089 kg bullet is traveling at 338 ms when it strikes a block of wood. if the bullet penetrates 0.74 m into the
The speed of sound in bone is 3500 m/s. How much time does it take the echo of a sound wave to travel from the back of the bone to the front of the bone if the bone is 2.50 cm thick.
A resistance R and a 4.7-H inductance are in series across a 60-Hz ac voltage. The voltage across the resistor is 22 V, What is the ac input voltage
On a dry day, just after washing your hair to remove natural oils and drying it in detail, run a plastic comb through it. Small bits of paper will be attracted to the comb. Describe why.
Neutron stars consist only of neutrons and have unbelievably high densities. Find the density of such a star
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