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Susan is pushing (horizontally) a 20.0 kg crate on her driveway at a constant speed of 1.0 m/s. The coefficient of static friction is 0.40 and the coefficient of kinetic friction is 0.25. What is the magnitude of the force (in N) she is applying on the crate?
A 20 kg projectile is fired at an angle of 600 to the horizontal with an initial velocity of 1.6 x 102 m/s. What is the straight line displacement between the two fragments after they land
An 18.0 pm wavelength photon is scattered by a stationary electron through an angle of 120 degrees. Find the wavelength of the scattered photon
A heat engine operates between a hot resrvoir at 1500k and a cold reservoir at 500k. Determine the Carnot efficiency of this engine
A train engine weighs 5 times as much as a flatbed car. how fast do the two move after the inelastic collision
A model rocket fired vertically from the ground ascends with avertical acceleration of 3.6m/s2 for 5.0 s. Its fuel isthen exhausted, so it continues upward as a free-fall particle and then falls back down.
A transverse wave on a string is described by the following wave function. y = 0.105 sin (?x/12 + 5?t) where x and y are in meters and t is in seconds. What is the speed of propagation of this wave
When ethanol (empirical formula C2H6O) burns, it combines with oxygen and forms carbon dioxide and water. Which of the following is the balanced chemical reaction for the burning of ethanol?
Suppose that the amount of heat removed when 1.6 kg of water freezes at 0.0 oC were removed from ethyl alcohol at its freezing/melting point of -114.4 oC. How many kilograms of ethyl alcohol would freeze?
A .42 kg copper penny drops a distance of 51.3m to the ground. determine the magnitude of the increase in internal energy
Define the four basic principles of research: autonomy, beneficence, nonmaleficence and justice. Then explain how these four principles interrelate in the conducting ethical research.Explain the importance of conducting ethical research.
A ballistic pendulum consists of an arm of mass M and length L = 0.51 m. One end of the arm is pivoted so that the arm rotates freely in a vertical plane. Initially, the arm is motionless and hangs vertically from the pivot point.
a compact disc spins at 2.2 revolutions per second. an ant is walking on the cd and finds that it just begins to slide
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