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When the starter motor on a car is engaged, there is a 330A current in the wires between the battery and the motor. Suppose the wires are made of copper and have a total length of 1.5m . What minimum diameter can the wires have if the voltage drop along the wires is to be less than 0.50V ? Express your answer using two significant figures.
A damped mass-spring system oscillates at 265 -Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.1 cm and the energy of the oscillating system is then 61.00 J.
The speed of a transverse wave on a string is 450 m/s and the wavelength is 0.18 m. The amplitude of the wave is 2mm. How much time is necessary for a particle of the string to move through a total distance of 1 km.
How much would a 80.0 kg person weight on Mars, where the acceleration of gravity is 3.93 m/s^2, and on Earths Moon, where the acceleration of gravity is 1.63 m/s^2.
Find the total number of lines in a 2.90 wide diffraction grating whose third-order spectrum has the 640 hydrogen- spectral line at an angular position of 39.0.
If a 120g mass was placed at the 25cm mark, and a 20 g mass at the 12 cm mark, where must a 500 g mass be placed to balance the system?
Assume that a 16.5 m/s wind is blowing across the roof of your house. The density of air is 1.29 kg/m3. Conclude the reduction in pressure (below atmospheric pressure of stationary air) that accompanies this wind.
Dan is gliding on his skateboard at 2.0 m/s. He suddenly jumps backward off the skateboard, kicking the skateboard forward at 8.0 m/s. How fast is Dan going as his feet hit the ground? Dan's mass is 60 kg and the skateboard's mass is 5.0 kg.
If the balloon is 24.9 cm in diameter when child loses it, what is its diameter at an altitude of 1510 m? Assume that the balloon is very flexible and so surface tension can be neglected.
Estimates is the acceleration of the object.
What frequency will hear after the train passes
A 28.0 {rm kg} child plays on a swing having support ropes that are 2.20 {rm m} long. A friend pulls her back until the ropes are 45.0^circ from the vertical and releases her from rest.
What is water speed along the boat during the vertical cross
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