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Julie carries an 8.0 kg suitcase as she walks 18 m along a horizontal walkway to her hotel room at constant speed of 1.5 m/s. How much work does julie do in carrying her suitcase?
A spring with spring constant 40N/m is attached to the ceiling, and a 5.5-cm-diameter, 1.5kg metal cylinder is attached to its lower end. what length of the cylinder is submerged
Consider a map oriented so that the x axis runs east-west (with east being the "positive" direction), find the direction of the total movement of the driver
The period of the earth around the sun is 1 year and its distance is 150 million km from the sun. What is the orbital velocity of the asteroid
You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 14.5m above the ground, Use the work-energy theorem to find its maximum height
A thin layer of magnesium fluoride (n = 1.38) is used to coat a flint-glass lens (n = 1.61). (a) What thickness should the magnesium fluoride film have if the reflection of 717-nm light is to be suppressed? Assume that the light is incident at right ..
q1. before throwing a 1.49 kg discus an athlete rotates it along a circular path of radius 1.18 m. the maximum speed of
Two conductors having net charges of 14 µC and ?14 µC have a potential di?erence of 11.1 V. Determine the capacitance of the system
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle.
define why a dielectric increases the maximum operating voltage of a capacitator even though the physical size of the capacitator doesn't change.
the shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of
A listener increases his distance from a sound source by a factor of 3.62. what is the change in the sound intensity level in dB
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 40-kg child sits on the other end. How long is the beam
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