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a hiker throws a stone from the upper edge of a vertical cliff. the stone's initial velocity is 25m/s directed at 40 degrees. with the face of the cliff. the stone hits the ground 3.75 s after being thrown and feels no appreciable air resistance as it falls.
(a) whats the height of the cliff?
(b) how far from the foot of the cliff does the stone land?
(c) how fast is the stone moving just before it hits the ground?
The E' is an unstable particle, with a mean lifetime on 2.5x10^-10s. What is the minimum uncertainty in this particles energy
Two negative point charges are separated by 16 and feel a mutual repulsive force of 1.55. The charge of one is three times that of other.
An object is located 8.00 cm from a converging lens that has a focal length of 10.0 cm. The height of the object is 0.67 cm. What is the height hi of the image
A car with a mass of 1.50x10^3 kg starts from rest and accelerates to a speed of 18.0 m/s in 12s. Assume that the force of resistance remains constant at 400-N all through this time. What is the average power developed by the car's engine?
A paperweight consists of a 9.00-cm thick plastic cube. Within the plastic a thin sheet of paper is embedded, what is the index of refraction of the plastic
a 50 kg toy airplane is suspended from the ceiling by a 1.6m cord and rotates in a horizontal circle. If the cord makes an angle of 35 degrees with the vertical, A) Find the speed of the plane B) Find the tension in the cord
Over the next several weeks, Frank never saw any of the industry's logo items being worn or used by the workers. Instead the workers were uncommunicative towards him and at times even hostile
You have been visiting a distant planet. Your measurements have determined that the planet's mass is four times that of earth but the free-fall acceleration at the surface is only one-fourth as large
A space vehicle is traveling at 3760 km/h relative to Earth when the exhausted rocket motor is disengaged, What is the speed (in km/h) of the command module relative to Earth just after the separation
Tim and Rick both can run at a constant speed Vr and walk at the constant speed Vw, (Vw
Estimate the volume of your body. (Consider your body to be a cylinder having a radius of about 6 inches (or 0.15 m) and a height of about 1.5 meters
A sound source emits sounds of frequency 210Hz that travel by still air at 340m/s. The listener moves at 75 m/s relative to still air toward the stationary source. What is wavelength of the sound between the source and the listener.
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