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A heater runs on an AC voltage of 120 V and draws a power of 44 W. If this heater were run instead on a DC voltage of 90 V, how much current would flow through the heater? Hint: The heater can be modeled as a resistor.
=_________A
A person with mass m1 = 59.0 kg stands at the left end of a uniform beam with mass m2 = 93.0 kg and a length L = 2.9 m. Another person with mass m3 = 68.0 kg stands on the far right end of the beam and holds a medicine ball with mass m4 = 13.0 kg
How much power is needed to push a 85kg chest at 0.72m/s along a horizontal floor where the coefficient of friction is 0.76
An atomic nucleus initially moving at 385m/semits an alpha particle in the direction of its velocity, and the remaining nucleus slows to 265m/s. what speed does the alpha particle have when it is emitted
A sport utility vehicle (SUV) and a sports car travel around the same horizontal curve. The SUV has a static stability factor of 0.80 and can negotiate the curve at a most speed of 18 m/s without rolling over.
A small block of aluminum (of mass 0.08 kg and specific heat 900 J/kg·K) at 365 K is placed in a container of water (of mass 0.125 kg and specific heat 4186 J/kg·K) at 273 K. What is the final temperature of the two bodies
A ball of mass 5.8 kg and radius 13 cm rolls without slipping horizontally at 5.6 m/s and hits a spring attached to a wall. What is the maximum change in length of the spring
On an air track, a 400 g glider moving to the right at 2.00 m/s collides elastically with a 500 g glider moving in the opposite direction at 3.00 m/s, Find the velocity of second glider after the collision
plan a picutre showing Mary's displacment due to rowing, her displacemnet due to the river's motion, and her net displacement.
For a convex mirror, when the object is 24.4 cm in front of the mirror the image is 15.8 cm behind the mirror. determine the distance of the image behind the mirror
Two rockets approach earth from opposite directions at equal speeds relatie to the earth, How fast are the rockets going with respect to earth
A light commuter rail train usually accelerates at a rate of 2.15 m/s^2 and usually decelerates with a rate of 3.20 m/s^2, The train can stop in 10.5 seconds from its top speed in an emergency. How far would it travel during this braking period
Besides the gravitational force, a 3.05-kg object is subjected to one other constant force. Determine the other force
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