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In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 38 m/s (around 90 mi/h) in a time of 7.5 s. The mass of the car and riders is 3600 kg. Find the average net force exerted on the car and riders by the magnets.
Nitrogen gas is heated by a pulsed laser to 50 000 K. If the diameter of the nitrogen atoms is assumed to be 1.0 ´ 10-10 m, what is the mean free path
The atmosphere of a planet absorbs 50% of the light passing through it after the light has traveled 200 meters. Through how much atmosphere does the light travel before it is 99% absorbed?
An electron follows a circular orbit around the nucleus of a hydrogen atom at a radius of 5 *10^11m and with aperiod of 1.4 *10^-16s. What is the magnitude of the orbital magnetic dipole moment of the hydrogen atom
A dockworker applies a constant horizontal force of 73.0 N to a block of ice on a smooth horizontal floor. The frictional force is negligible. If the worker stops pushing at the end of 5.50 s, how far does the block move in the next 5.90 s
A turtle crawls along a straight line, which we will call the x-axis with the positive direction to the right. The equation for the turtle's position as a function of time is x(t) = 50.0 cm +(2.00 cm/s)t -(.0625 cm/s^2)t^2 At what time is the turt..
A 8.85 ?C point charge is glued down on a horizontal frictionless table on the right. If is tied to a -6.65, Find the tension in the wire, What would the tension by if both charges were negative
An electron is moving at a speed of 1.1e4 m/s in a circular path of radius of 2.1 cm inside a solenoid. Find the strength of the magnetic field inside the solenoid
Suppose the steel alloy is used for an automobile axle that rotates at an average rotational velocity of 600 revolution per minute (RPM). What is the highest lifetime of continuous driving that are allowable at stress level of 310-MPa.
A rubber ball is dropped from rest 3.3m onto level ground. Bouncing back the ball loses 25% of its mechanical energy. To what height does it rebound
An electron moving with a speed of 6.0×10^5 m/s in the positive direction experiences zero magnetic force. Find the components of the magnetic field
A 60 kg car moving towards the right at 5 m/s collides head on with an 50 kg car moving towards the left at 6 m/s, find the velocity of the combined bodies
The velocity selector in the figure is designed to allow charged particles with a speed of 4700 m/s to pass through undeflected. Find the magnitude of the required electric field
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