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a rock is tossed off the top of a cliff of height 34.8 m. Its initial speed is 29.1 m/s, and the launch angle is 29.8 degrees with respect to the horizontal. What is the speed with which the rock hits the ground at the bottom of the cliff?
The density of free electrons in gold is 5.90 x 10^28 m-3. The resistivity of gold is 2.44 x 10-8 at a temperature of and the temperature coefficient of resistivity is 0.004 ()-1. A gold wire, 1.30mm in diameter and 27cm long, carries a current of..
A brass rod with a length of 10.0 cm is placed end to end with an aluminum rod with a length of 30.0 cm, What is the heat flow from the hot temperature to the cold temperature
The size of an atom is approximately 10-8cm. to locate an electron within the atom, one should use electromagnetic radiation of wavelength not longer than, say, 10-9cm, what is the energy of a photon with such a wavelength
The wing of an airplane has an average cross-sectional area of 13 m2 and experiences a lift force of 91,000 N. What is the average difference in the air pressure
A projectile is shot from the ground at an angle of 55 degrees with respect to the horizontal,find the horizontal component and the vertical component of initial velocity
A 5.3MeV (kinetic energy) proton enters a 0.15T field, in a plane perpendicular to the field. What is the radius of its path
block 1 of mass m1 slides from rest along a frictionless ramp from height h = 3.2 m and then collides with stationary block 2, What is the value of distance d if the collision is elastic
A small, spherical bead of mass 3.05 g is released from rest at t = 0 in a bottle of liquid shampoo. The terminal speed is observed to be vT = 1.80 cm/s. Find the value of the resistive force when the bead reaches terminal speed
shows a particle with positive charge q = 1.60 x 10-19 C is moving with speed v = 8.43 x 104 m/s toward a long straight wire with current i = 371 mA. find the magnitude of the force on the particle due to the current
An electrical generating plant operates a boiler at a temperature of 220 C, What is the maximum theoretical efficency of the plant
assume that friction is so small that it can be ignored. a force toward the right of constant magnitude is applied to
A rock is thrown downward into a well that is 8.90 deep. If the splash is heard 1.20 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.
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