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(a) What are the speed and period of a person on a carousel if the person has a centripetal acceleration with a magnitude of 1.0 m/s2 when she is standing 3.0 m from the axis?
(b) What is the magnitude of her centripetal acceleration if she then moves in to a distance of 1.5 m from the axis while the carousel continues to spin at the same rate?
If John Glenn weighed 640 N on the Earth's surface, i) how much would be having weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from the center of the earth? ii) Why is it said that an astronaut is never truly..
A gymnast of mass 60kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
The flywheel of an engine has a moment of inertia 2.50 about its rotation axis. What constant torque is required to bring it up to the angular speed of 390 in a time of 8.50, starting from rest? What is its last kinetic energy . Discover an angular..
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met in practice. The voltmeter has an internal resistance of 8 x 10^9 Ohms and is used to measure the voltage across the resistor R2.
Two loudspeakers are placed above and below each other and driven by the same source at a frequency of 4.50x10^2 Hz. An observer is in front of the speakers (to the right) at point O.
At one instant, a mass (m = 2 kg) is at the location m and attached to one end of a spring with a spring constant ks = 60 N/m and a relaxed length L0 = 0.22 m. The origin is placed where the other end of the spring attaches to the ceiling.
A 195g oscillator has a speed of 91.50cm/s when its displacement is 3.90cm and 73.0cm/s when its displacement is 6.20 cm
Three point charges are fixed to rectangular coordinate system, Calculate the magnitude and direction of the net electrostatic force on the charge on the x-axis
here is a point on the x-axis between the two charges where the electric field is zero. Find out the location of the point where the electric field is zero.
27 g of copper pellets are removed from a 300 C oven and immediately dropped into 120 mL of water at 21C in an insulated cup. What will the new water temperature be?
A wrecking yard inventor wants to pick up cars by charging a 0.400 m diameter ball and inducing an equal and opposite charge on the car.
If light enters the window from outside at 23.0° to the normal, at what angle to normal does it exit the window on the inside.
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