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A projectile of mass 2.06 kg approaches a stationary target body at 7.70 m/s. The projectile is deflected through an angle of 89.8° and its speed after the collision is 6.23 m/s. What is the speed of the target body after the collision if the collision is perfectly elastic?
On a 7.2 m length of string, you count 5 crests and 4 troughs. What is the wavelength of the waves on the string
A charged rod carrying a negative charge is brought near two conducting spheres that are in contact with each other but insulated from the ground. If the two spheres are then separated, what charge does B have, positive, negative or neutral?
A father and a daughter balance a teeter totter
A child rides a toboggan down a hill that descends at an angle of 18.6? to the horizontal. The hill is 37.6 m long. find the vertical component of the child's displacement
The acoustical system is driven by speaker emitting a 432Hz note. If destructive interference occurs at a particular instant, by what least amount amount must the difference of two path lengths in the U-shaped tube be increased so as to hear const..
A heat engine does 798.57 J of work per cycle while exhausting 163.83 J of waste heat. What is the engine's thermal efficiency in percent
A solid cylinder of mass 10 kg is pivoted about a frictionless axis thought the center O. How many radians does the cylinder rotate through in the first 5.0 seconds, if it starts from rest
An RLC series circuit has a 2.50 ? resistor, a 100 µH inductor, and an 80.0 µF capacitor. Find the average power at the circuits resonant frequency
A pot containing 1.03 liters of water, initially at 19*C, How much heat must be supplied to bring it to a boil
A charged particle moves through a velocity selector at a constant speed in a straight line, Calculate the charge-to-mass ratio of the particle.
A student begins at rest and then walks north with an average speed of v1=0.85 m/s. What was the student's overall average velocity, in m/s, for the trip assuming the student spent equal times at speeds v1 and v2
The current in a series circuit is 22.0 A. When an additional 12.0-? resistor is inserted in series, the current drops to 11.0 A. What is the resistance in the original circuit
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