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At a certain location, Earth's magnetic field of 53 µT is horizontal and directed due north. Suppose the net field is zero exactly 7.5 cm above a long, straight, horizontal wire that carries a constant current. What is (a) the magnitude of the current (in A) and (b) the angle between the current direction and due north?
The situation just described occurs when the plane is above a point on the ground that is two-thirds of the way from the antenna to your house. determine the wavelength of the radio waves?
A certain thin, uniform rod has a mass of 2 kg and length 3 m. To what shorter length must you trim it (discarding the smaller part) so that the remaining length has half the original moment of inertia about its end.
An artificial earth satellite has a circular orbit of radius 5.81 106 m (which means it is orbiting approximately -550 km above the surface of the earth) in an equatorial plane. Compute the (constant) speed of the satellite
Starting from rest, a 91-kg firefighter slides down a fire pole. The average frictional force everted on him by the pole has a magnitude of 800 N, How far did he slide down the pole
The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force, calculate the radius of the circular path on which the particle would move if it were a..
Starting from rest, a 5.4-kg block slides 2.10 m down a rough 30.0° incline. Determine the work done by the force of gravity
Three astronauts, propelled by jet packs, push and guide a 120.0 kg asteroid toward a processing dock, exerting forces of 32.0 N at an angle of 30.0 degrees above the positive x-direction, What is the direction of the asteroids acceleration
A train moving at a constant speed of 59.0 km/h moves east for 50.0 min, What is the average velocity of the train during this run
A precious-stone dealer wishes to find the specific heat capacityof a 0.040-kg gemstone. What is the specific heat capacity of the specimen
A satellite is orbiting the Earth at a distance of 3.31RE and with a speed of 3.59 km/s. With what speed would the satellite hit the Earth's surface if somehow it suddenly stopped and fell to Earth? Ignore air resistance.
An object of mass m moves in a circle of radius R under the influence of a force of magnitude F.
A boy on a skateboard coasts along at 6.0 m/s. He has a ball that he can throw at a speed of 10 m/s. What is the ball's speed relative to the ground if he throws the ball forward
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