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A certain spring can withstand a maximum tension of 9.0 lbwithout breaking. A child ties a 0.82 lb stone to one endand, holding the other end, whirls the stone in averical circle of radius 3.0 ft, slowly increasing the speed untilit breaks.
a.) Where is the stone on its path when the string breaks?
b.) What is the speed of the stone as the spring breaks?
Some people think that they can stop themselves rushing forward by putting their hands on the dashboard. Find out the mass of the object that has a weight equal to force you just calculated.
A single 212Po nucleus, initially at rest, emits an alpha particle as it decays into a 208Pb nucleus. What is the total amount of nuclear potential energy, in joules, that was released in this process
If the moment of inertia of the wheel about its axle is 0.30kg*m2, what is the magnitude of the frictional torque.
A dedicated sports car enthusiast polishes the inside and outside surfaces of a hubcap that is a section of a sphere. When he looks into one side of the hubcap, How far is his face from the hubcap
A 0.09 kg arrow is pulled back in a bow. After being held still, it is let go, moving 25m/s after the 0.47 meters in which the arrow is in contact with the bow string. What work was done on the arrow by the bow string? What force was exerted by the a..
q1. the frequency of an opera singer is 450 hz. assume the speed of sound in air is 340 ms. what is the frequency heard
The auditory canal, leading to the eardrum, is a closed pipe 2.8 cm long. Find out the approximate value (ignoring end correction) of the lowest resonance frequency.
A tungsten wire has a radius of 0.086 mm and is heated from 20.0 to 1422 oC. The temperature coefficient of resistivity is ? = 4.5, How long is the wire
A vertical electric field of magnitude 2.45 104 N/C exists above the Earth's surface on a day when a thunderstorm is brewing. Determine the electric flux through the bottom of the car
find the magnitude and direction of the impulse delivered to the ball by the floor.
The electric potential at a position located a distance of 21.6 mm from a positive point charge of 8.70×10-9C, estimate the value of the second charge
A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with a velocity of -2.0 m/s. What is the velocity of the red ball after the collision?
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