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A magnetic field has a magnitude of 1.20 x 10-3 T, and an electric field has a magnitude of 4.70 x 103 N/C. Both fields point in the same direction. A positive 1.8-µC charge moves at a speed of 2.50 x 106 m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force that acts on the charge.
A man normally consumes 8.4 MJ of food energy per day. He then begins running a distance of 9km four times per week. If he expends energy at the rate of 450W while running at 12 km/h , how much more food energy should he consume daily in order to mai..
two beetles run across flat sand starting at the same point. beetle 1 runs 0.46 m due east then 0.75 m at 31o north of
An important discovery by J.J Thomson gives support to thetheory of simple electrostatic phenomena. What is the discovery andhow does it strengthen the theory?
In one day, a 75 kg mountain climber ascends from the 1500-m level on a verical cliff to the top at 2400m. What is the change in her gravitational potential energy
A solid sphere and a solid cylinder with the same mass and radius roll down an inclined plane without slipping. Which one will reach the bottom of the incline first. Explain why. Assume friction is negligible for both.
A candle is placed 17.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, Find the focal length of the convex mirror
A hall sensor made from silicon is 0.40 nm thick and has a charge carrier density of 2.0 x 10 ^19 m^-3. What is the value of the magnetic field
For a long solenoid, the magnetic field strength within the solenoid is given by the equation where t is time in seconds. find the radius of the solenoid
A 33.6 m length of copper wire at 23?C has aradius of 0.19 mm . The resistivity of copperis 1.7 × 10?8 ? m, determine the current in the wire
A soldier has a huge contraption that notches a large 2 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
A car traveling at 93km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.75 m. What was average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1.00g ..
A destroyer sends a sonar pulse out to detect a submarine directly below the ship in the ocean. If the speed of sound in what is 1517 m/s and it takes 64.13 s for the return pulse to hit the hydrophone on the bottom of the ship, how deep is the su..
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