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A coil spring stretches by 3.90cm when a mass of 700 grams is suspended from it. What additional force is necessary to stretch the an additional 2.00cm?
The famous horse & cart physics scenario is explained. This scenario is used to describe why many people have a common misconception about what Newton’s 3rd Law says & does not say.
Energy is produced with the sun by nuclear fusion reactions in which matter is converted into energy. We can measure that the Sun produces energy at the rate of 3.80×1026 W. How many tons of matter does the Sun lose each second?
A bat moving at 7.2 m/s is chasing a flying insect. The bat emits a 43 kHz chirp and receives back an echo at 43.68 kHz. At what speed is the bat gaining on its prey
q1. a proton travels with the speed of 8.34times105 ms at an angle of 32.3deg with the direction of a magnetic field.
A group of swimmers is resting in the sun on an off-shore raft. How fast are the waves moving
An old covered bridge across a country stream weighs 89,200N. A large truck stalls 4m from one end of the 9.00-m bridge. What weight must each of the piers support
A satellite in geosynchronous orbit above the moon will go around once in 27.3 days. what is the orbital radius of the satellite
The average power dissipated in a 47-? resistor is 2.5 W. What is the peak value I0 of the ac current in the resistor
A wooden chest is pulled across a level ship's deck by a force of 2.20E2 N. If the chest accelerates at 0.488 m/s² and coefficient of friction between the object and the deck is 0.310, what is the mass of the wooden chest?
Drops of rain fall perpendicular to the roof of a parked car during a rainstorm. find the average force exerted by the rain on the roof
In the Rutherford scattering experiment, 3.30 MeV alpha particles (4He nuclei containing 2 protons and 2 neutrons) scatter off lead nuclei (containing 82 protons and 126 neutrons). Determine the maximum force exerted on the alpha particle
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 15.2m above the ground, find its speed just as it left the ground
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