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A rocket takes off at an angle of 20° from vertical. Two observers are standing 20 miles away from the lunch site, so that the launch site is directly in between them. If the rocket is traveling at 600 MPH, how fast are the distances from each observer to the rocket changing 60 seconds after takeoff?
A 1400 kg car traveling in the positive direction takes 15.0 seconds to slow from 25.0 meters per second to 12.0 meters per second
The magnitude of the acceleration due to gravity
A standing wave in a pipe with both ends open has a frequency of 680 Hz. The next higher harmonic has a frequency of 1020 Hz, How long is the pipe
A 2.0kg solid cylinder (radius = 0.10m , length = 0.70m ) is released from rest at the top of a ramp and allowed to roll without slipping. When the cylinder reaches the bottom of the ramp, what is its total kinetic energy
q1. a curve of radius 40 m is banked for a design speed of 100 kmh. if the coefficient of static friction is 0.30 wet
An object's true weight is 123 N. When it is completely submerged in water, its apparent weight is 82 N. what is the density of the object
Two point charges are located on the y axis, by these two charges on a third charge q3 = 7.50nC located at y3 = 0.350m ? and what is the direction of the net force
An electron and a proton each have a thermal kinetic energy of 3×kBT/2. Compute the de Broglie wavelength of each particle at the temperature of 2050 K. (kb is Boltzmann's constant, 1.38×10-23 J/K).
Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300km above the earth's surface; at the high point, or apogee, it is 2500km above the earth's surface. What if the rockets were fired ..
a vector representing 170 n is oriented at 32 degrees with the horizontal. what is the magnitude of its horizontal
A short time later, all of the charge has left the capacitor and the current flowing through the inductor has reached its maximum value. What is this current
A mass , m=1.75 kg, is held between two springs having spring constants 30 N/m and 75 N/m respectively, Find the angular frequency, w, for small oscillations
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