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A satellite in Earth's orbit is accelerating towards the Earth. Explain why, on average, the satellite is not getting closer to the Earth. Why?
When you inhale helium and speak, your voice becomes far higher in pitch. Why?
A diathermy machine, used in physiotherapy, generates electromagnetic radiation that gives the effect of "deep heat" when absorbed in tissue. what is its wavelength
A cart is propelled over an xy plane with acceleration components ax = 6.4 m/s2 and ay = -1.9 m/s2. what is the velocity of the cart when it reaches its greatest y coordinate
a straightforward method of finding the density of an object is to measure its mass and then measure its volume by submerging it in a graduated cylinder, What is the density of a 220 g rock
A ball thrown straight up at an initial speed of 14.0m/s reaches a maximum height of 7.6m. What fraction of the ball's initial kinetic energy is dissipated by air resistance as the ball moves upward?
A moving 2.7 kg block collides with ahorizontal spring whose spring constant is 426N/m (see figure). The block compresses the springa maximum distance of 15.0 cm from its rest position. The coefficient of kinetic friction between the block and the..
Pushing on the pump of a soap dispenser compresses a small spring. When the spring is compressed 0.50cm, its potential energy is 0.0025 J. (a) what is the force constant of the spring? (b) What compression is needed for the spring potential energy to..
When a bow and arrow are cocked, a force is applied to the string to pull it back. Is the energy of the system increased? Explain
bob is talking to alice using a tin can telephone which consists of two steel cans connected by a 20-m-long taut steel
a solenoid 1.40 m long and 2.50 cm in diameter carries a current of 18.0 A. Find the length of the wire forming the solenoid
Two parallel, infinite, nonconducting plates are 11.5 cm apart and have charge distributions of +3.1 µC/m2 and -3.1 µC/m2. What is the force on an electron in the space between the plates? What is the force on an electron located outside the two plat..
A common belief is that a hole in a jet plane can suck a person out, Calculate the fractional difference between this force and the weight wman of a typical adult male (185 lb)
A solid cylinder of mass 3 kg and radius 0.2 m starts from rest at the top of a ramp, inclined 15°, and rolls to the bottom without slipping. (For a cylinder I = 0.5MR2) The upper end of the ramp is 1.2 m higher than lower end. Find the linear sp..
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