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Consider a simple pendulum (no friction). Does the angular acceleration of the mass remian constant during its motion? If not, then how does the angular acceleration change? Is the angular accerlation ever equal to zero when the pendulum is in motion? If yes, then in which moment the mass would have the zero angular accerlation?
A speed boat is moving across the surface of a lake. At time t1 = 0 with the components of its velocity are vx = 25 m/s and vy = -10 m/s. At time t2 = 15 s the components are vx = 12 m/s and vy = -21 m/s. What are the magnitude and direction of the a..
A 0.20 kilogram ball is thrown straight up into the air with an initial speed of 18 m/s. Compute the momentum of the ball at its maximum height
A woman can read the large print in a newspaper only when it is at a distance of 63 cm or more from her eyes. (a) Is she nearsighted (myopic) or farsighted (hyperopic), and what kind of lens is used in her glasses to correct her eyesight? (b) What sh..
An excellent laboratory vacuum has a pressure of 5.00 multiply.gif 10-18 atm, ow many gas molecules are there per cubic centimeter in such a vacuum at 290 K
If the angle among the incident electric field and a polarizer’s transmission axis is 40°, what fraction of the incident intensity is transmitted? If a second polarizer is additional to the situation with a transmission axis at 75°, with respect to i..
An organ pipe is 119 cm long. What are the fundamental and first three audible overtones if the pipe is closed at one end.
An unstable high energy particle is created in the laboratory, and it moves at a speed of 0.968c. Calculate what is the proper distance traveled
A 1000-kg rocket has a net propulsion force of 20 kN (kiloNewtons). What is the net work done on the rocket in kilojoules (kJ)
The transformer in the DC supply for my laptop has an output voltage of 20 volts when plugged into a 110 volt outlet. What is the input current of the power transformer
a 10.8nc charge is located at position xy1.0cm2.0 cma at what xy position is the electric field -225000i nc?b at what
two parallel sheets of aluminum foil separated by 0.1 mm are connected to a 9-v battery. the area of each sheet is 0.5
When it rains, water vapor in the air condenses into liquid water, and energy is released. How much energy is released when 0.0429 m (1.69 inch) of rain falls over an area of 2.59×106 m2
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