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A 2762 kg van runs into the back of a 931 kg compact car atrest. They move off together at 6.2 m/s. Assuming nofricition with the ground, find the initial speed of the van. Answer in units of m/s.
How fast (in {rm rpm}) must a centrifuge rotate if a particle 8.5 cm from the axis of rotation is to experience an acceleration of 115000 {rm g}'s.
A crate on a motorized cart starts from rest and moves with a constant eastward acceleration of a = 2.50m/s^2. What is the instantaneous power supplied by this force
A 0.250-kg piece of aluminum that has a temperature of -173 °C is added to 1.0 kg of water that has a temperature of 1.4 °C. determine the mass of water that has been frozen into ice
Two children setup a "telephone" by placing a long, slender aluminium (Y = 6.9 × 1010 N/m2) bar that has a length of 6.1-m between their two houses. To communicate, the child taps a coded message on one end. How long do the sound waves take to reach ..
Consider two strings on a violin. They are the same length and have the same tension. What is the mass density of the second string
an object with a mass 2.70kg is executing simple harmonic motion, attached to a spring with spring constant k=280 N/m. What is the frequency of oscillation of the object
An ideal monatomic gas is the working substance of a Carnot engine. During the isothermal expansion the volume doubles. Compute the temperature of the reservoirs between which the engine operates
find an article on a current event related to macroeconomics. briefly summarize the article and state how a concept in
A ball having a mass of 2 kilograms, starting at ground level, is shot straight up into the air. What is the ball's Total Energy at these same three points in its flight
A spacecraft descends vertically near the surface of Planet X. An upward thrust of 26.0 from its engines slows it down at a rate of 1.20, find the spacecraft's weight near the surface of Planet X
Four equal point charges of +3.0 uC are placed in air at the our corners of a square that is 40cm on a side. find the force on any one of the charges
A proton moves with a velocity of = (4i ? 5j +k ) m/s in a region in which the magnetic field is = (i + 2 ?k ) T. What is the magnitude of the magnetic force this particle experiences?
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