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A warning buoy is observed to raise every 5.0 s as crests of waves pass by it.
(a) What is the period of these waves?
(b) What is the frequency?
Describe Erikson, Levinson, cognitive developmental theorists, Kohlberg, behavioral theorists, Bronfenbrenner, Holland, the eclectic theory, and composite theory.
A spring loaded gun is used to launch a ping pong ball (mass 4g) at an angle of 50 degrees with the horizontal. how far does the ping pong travel if it is launched from the ground
A tennis ball of mass 57 g is traveling in the + x direction with a speed of 38 m/s. What is the change in momentum of the ball during the hit
two 8.00 kg blocks are connected by a massless string over a frictionless pulley of radius 10.0 cm and rotational inertia, I. What is the inertia of the pulley
A simple pendulum is swinging back and forth through a small angle, its motion repeating every 1.13 s. How much longer should the pendulum be made in order to increase its period by 0.34 s
A student sits on a rotating stool holding two 2.0-kg objects. When his arms are extended horizontally, Find the new angular speed of the student
How many times more light is gathered by a single Keck telescope, whose mirror is equivalent in area to that of a circle 10 m in diameter, than by the Palomar Hale telescope, whose mirror is 5 m in diameter, in any given interval of time?
Suppose a car's brakes can produce an acceleration of -7 m/s2. what is the minimum distance necessary to stop the car
In a photoelectric-effect experiment, the wavelength of light shining on an aluminum cathode is decreased from 249nm to 207nm. What is the change in the stopping potential
When responding to sound, the human eardrum vibrates about its equilibrium position. Suppose an eardrum is vibrating with an amplitude of 6.75 10-7 m, What is the maximum acceleration of the eardrum
define the potential difference between the plates.With what force must the player push the puck so that his force just equals the frictional force.
An electric heater carries a current of 16.5 A when operating at a voltage of 1.50 102 V. What is the resistance of the heater
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