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An airplane flying directly eastward at a constant rate travels 305 km in 2.0 h.
(a) What is the average velocity of the plane?
km/h
(b) What is its instantaneous velocity?
km/s
A small bird's wings can undergo a maximum displacement amplitude of 5.9 cm. what is the oscillation frequency of the wing tips
An 80.0-kg man jumps from a height of 2.50 m onto a platform mounted on springs, What is the man's speed at the instant he depresses the platform 0.120 m
A lithium-5 nucleus is moving at 1.6 Mm/s when it decays into a proton and an alpha particle. What are the magnitude and direction of the proton's velocity
Two soccer players start from rest, 47 m apart. They run directly toward each other, both players accelerating. At the instant they collide, how far has the first player run
A vector has an x-component of ?30.0units, Find the magnitude and direction of the vector
A 10,000 kg railroad car is rolling at 2 m/s when a 400 kg load of gravel is suddenly dumped in. What is the railroad cars speed just after the gravel is dumped in.
A heat engine is to be built to extract energy from the temperature gradient in the ocean. what is the maximum efficiency such an engine can have
A spinning wheel is slowed down by a brake, giving it a constant angular acceleration of 5.20 rad/s^2. What is the angular speed of the wheel at the end of the 2.80-s interval
An 24 g rifle bullet traveling 370 m/s buries itself in a 4.8 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. find the maximum vertical displacement of the pendulum.
how much time passes before the brick lands on the ground.
A hydrogen atom is in its fourth excited state (n = 5). Using the Bohr theory of the atom, calculate the linear momentum of the electron
Consider a 9.5-mm-diameter wire made from copper (mass density 8.9 g/cc, resistivity 1.7E-8 ohm-m). What is the electric field (in V/m) in the wire
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