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An electron and a proton attract each other with a 1/ r2electric force, just like the gravitational force. Assume that an electron moves in a circular orbit about a proton with a period of the circular motion of 16.06 hour. Determine the radius of the orbit? (Note, this is an unrealistic situation!)
A 990-kg sports car collides into the rear end of a 2100-kg SUV stopped at a red light. The bumpers lock, the brakes are locked, What was the speed sports car at impact
Quarterback passed a ball to a receiver while running at 1.5 m/s forward. The ball was released at a height of 2.5 meters with an angle of 45 degrees, Find the final velocity of the ball and its direction
A proton travels with the speed of 8.34×105 m/s at an angle of 32.3° with the direction of a magnetic field. The field exerts a force of 3.00×10-17 N on the proton. What is the strength of the field.
A 8.85- g bullet from a 9-mm pistol has a velocity of 376.0 m/s. what was the velocity of the bullet as it emerged from the block
Two positive point charges, each of which has a charge of 4.3E-9 are located at y=+.10m and y+-.10m, What is the direction of this force
If we can treat the atom as a 'box' of size 20 nm for an electron, what wavelengths could this electron have
Oasis B is located 25 km east from oasis A. A camel starts from oasis A and travels 19.6 km in the direction 14.7 degrees south of east. Then it walks 8 km directly to the north. How far is the camel from oasis B?
If the coefficient of kinetic friction between tires and dry pavement is 0.82, what is the shortest distance in which you can stop an automobile by locking the brakes when traveling at 26.6 m/s
A constant net torque is applied to a object. Which one of the following wil not be constant? A solid disk and a hoop have the same mass, radius, and angular speed. If the same braking torque is applied to each, which takes longer to stop?
Objects of equal mass are oscillating up and down in simple harmonic motion on two different vertical springs. The spring constant of spring 1 is 205 N/m. Find the spring constant of spring 2.
A positive charge, Q = 45 is placed on the x-axis at x = -1.9 cm. A positive charge which is twice as large is brought from infinity to a point x = +1.9 cm on the x-axis. what would be the speed of the 2*(45) charge at infinity
A fisherman throws the anchor off her boat at an angle of 5°above the horizontal. how fast did she throw the anchor
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