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The acceleration of gravity on Earth is approximately 10 m/s2 (more precisely, 9.8 m/s2). If you drop a rock from a tall building, about how fast will it be falling after 3 seconds? Hint: Initial velocity of the rock is 0 m/s. Acceleration 10m/s2 means that the change in velocity is 10 m/s per second ( or every 1 second).
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm. what's the balloon's new radius
Two charged concentric spheres have radii of 7.50 cm and 13.00 cm. Find the electric field at 19.00 cm
A rubber ball is vigorously rubbed with a piece of fur, which gives the ball a charge of -69.6 nC. To the nearest tenth of a nanocoulomb, what must be the charg
Objects A and B are both positively charged. Both have a mass of 400g , but A has twice the charge of B. When A and B are placed 25cm apart, B experiences an electric force of 0.54N . What is the charge on A? If the objects are released, what is t..
a ski trail makes a vertical descent of 78.0 m as shown in the figure below . a novice skier unable to control his
A 0.13 kg meter stick is held perpendicular to a wall by a 3.0 m string going from the wall to the far end of the stick. Find the tension in a 1.5 m string. Find the tension in the string.
A particle with a charge of -1.80 x 10-8 C is moving with an instantaneous velocity of magnitude 45 km/s in the xy-plane at an angle of 46.5 degree counterclockwise from the +x axis. Find the direction of the force exerted on this particle by a mag..
When at rest, the particle has a lifetime of 0.15 ns before it decays into a neutron and a pion. One particular particle is observed to travel 2.7 cm in the lab before decaying. What was its speed
A certain brand of hotdog cooker works by applying a potential difference of 142 V across opposite ends of a hot dog and allowing it to cook by means of the thermal energy produced.How much electrical energy is transferred to thermal energy.
An electron (charge=-1.6x10^-19C) is moving at 3x10^5 m/s in the positive x direction. What are the magnitude and direction the magnetic force on the electron
a circular-motion addict of mass 85 kg rides a ferris wheel around in a vertical circle of radius 10 m at a constant
Bonnie and Clyde are sliding 270 kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 395N of force while Bonnie pulls forward on a rope by N of force.
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