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A rifle is aimed horizonatally at a target 50 m away. The bullet hits the target 2.0cm below the aim point. What was the bullets flight time? what was the bullets speed as it left the barrel? (go through each step, I'm trying really hard to understand this!)
a dog walking quickly away from a motion detector. Draw a velocity graph that could represent this motion
A string is stretched between fixed supports separated by 75.0 cm. It is observed to have resonant frequencies of 288.0 and 384.0 Hz, What is the lowest resonant frequency for this string
He pushes just hard enough to get the desk moving and continues pushing with that force for 5.00 s. Explain how much work does he do on the desk?
Two concentric spheres of radii a and b> a have equal and oppposite charge Q when the potential diffrence between them is V. What is the capacitance of the spheres
An electron is accelerated to speed of 1.5*10^8 m/s. at that speed, compare the relativistic results to classical results for , find the electron rest energy according to the relativistic laws
A metallic sphere has a charge of +4.4 nC. A negatively charged rod has a charge of -6.0 nC. When the rod touches the sphere, 7.2 109 electrons are transferred. What are the charges of the sphere and the rod now? sphere nC rod nC
A hiker weighing 565 N carries a 186 N pack up Mt. Whitney (elevation, 4420 m), increasing her elevation by 3000 m. Find the minimum internal work done by the hiker's muscles
What is the mass of the block on the left. Find this angle of the thread.
what is the electric potential energy of this particle. what is its speed just before it strikes the positive plate.
assume the film show in the figure has an index of refraction of 1.36 and is surrounded by air on both sides.
A hypodermic syringe contains a medicine with the density of water. The barrel of the syringe has a cross-sectional area of 2.5 x10-5 m2.
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 15.0° below the horizontal. Find the length of time the car is in the air
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