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Q. The aurora is caused when electrons and protons, moving in the earth's magnetic field of , collide with molecules of the atmosphere and cause them to glow. What is the radius of the circular orbit for (a) an electron with speed 4.0×106 and (b) a proton with speed 6.0×104 .
what kind of equation or background information is useful for a problem like this?
Q. A 1 kg ball released from horizontal attatched to a 2.5m string collides ellastically with a 2 kg block at rest. what is the speed of the block after the collision?
An 80 g, 35 cm long rod hangs vertically on a frictionless, horizontal axle passing through its center. A 13 g ball of clay travelling horizontally at 2.50 m/s hits and sticks to the very bottom tip of the rod.
An Indy car with a speed of 125km/h goes around a level, circular track with a radius of 1.3km. What is the centripetal acceleration of the car.
What is magnitude of the runner total displacement
Find out the magnitude of the electric field at a point P on the y-axis 0.529 m from the origin. The value of the Coulomb constant is 8.99 × 109 N • m2/C2.
Julie drives 100 mi to her Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 25mph and the other half at 80. On her return trip, she drives half time at 25mph and half the time at 80 mph.
what is the minimum coefficient of static friction required between tires and race track if the car is to stay on the track at a speed of 130m/s.
A car is driven 155 km west and then 75 km southwest. What is the displacement of the car from the point of origin (magnitude and direction).
As shown in the figure, sunlight is coming straight down (negative z-direction) on a solar panel (of length L = 1.51 m and width W = 0.930 m) on the Mars rover Spirit.
Two ocean liners, each with a mass of 38,000 metric tons, are moving on parallel courses, 92 m apart. What is the magnitude of the acceleration of one of the liners toward the other due to their mutual gravitational attraction? Treat the ships as par..
IP Halley's Comet Halley's Comet, which passes around the Sun every 78 years, has an elliptical orbit. When closest to the Sun (perihelion) it is at a distance of 8.823 x 10^10 m and moves with a speed of 54.6 km/s. The greatest distance between Hall..
What is momentum of the system immediately after the pack is thrown?
An opera singer in a convertible sings a note at 419 Hz as cruising down the highway at 81.0 km/hr. What is the frequency (in Hz) heard by a person standing beside road in front of the car? suppose that the speed of sound is 343 m/s.
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