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A uniform electric field has a magnitude 330 N/C and is directed along the +y-axis. If a 5.50 uc charge moves from the origin (x,y) = (0.0xm, 0.0cm) to the point (x,y) = (-15.0 cm, -30.0cm), what is the change in potential energy for this charge?
When a single person shouts at a football game, the sound intensity level at the center of the field is 59.9dB. When all the people shout together, the intensity level increases to 111dB.
A space station in the forf of a large wheel, 129m in diameter, rotates to provide an "artificial gravity" of 6.10 m/s^2 for people located at the outer rim.
Water has a mass per mole of 18g/mol, and each water molecule (H2O) has 10 electrons.
Calculate the force a piano tuner applies to stretch a steel piano wire 7.70 mm, if the wire is originally 0.850 mm in diameter and 1.30 m long
The ball is pulled to one side and released to swing as a pendulum, reaching a speed of 5.8 m/s as it passes through the lowest point. Illustrate what is the tension in the rope at that point?
A cosmic ray electron moves at 7.00 multiplied by 106 m/s perpendicular to the earth's magnetic field at an altitude where field strength is 1.20 multiplied by 10-5 T
A snow mibile is pulling a large sled across a snow-covered field. The weight of the sled is 3560 N. If the coefficient of friction of the sled is 0.12,
A 0.800mm -diameter ball bearing has 2.50×109 excess electrons, What is the ball bearing's potential
Sketch a free body diagram for the hot air balloon. When the burner is turned on what force is required to cause an upward acceleration of 5m/s squared?
A river has a steady speed of 0.25m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at the speed of 1.4m/s in still water.
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 37.5 m/s and initial angle of 38.4° with respect to the horizontal.
A race car has a mass of 701 kg. It starts from rest and travels 35.0 m in 3.0 s. The car is uniformly accelerated during the entire time. Illustrate what net force is exerted on it?
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