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Two cylindrical bars, each with diameter of 2.30 cm, are welded together end to end. One of the original bars is copper and is 0.350 m long. The other bar is iron and is 0.175 m long. What is the resistance between the ends of the welded bar at 20°C?
Suppose a car is traveling at +21.1 m/s, and the driver sees a traffic light turn red, What is the stopping distance of the car, as measured from the point where the driver first notices the red light
Find the force necessary to start the crate moving, given that the mass of the crate is 32 {rm kg} and the coefficient of static friction between crate and floor is 0.60.
How much would a 80.0 kg person weight on Mars, where the acceleration of gravity is 3.93 m/s^2, and on Earths Moon, where the acceleration of gravity is 1.63 m/s^2.
A pair of speakers separated by 0.820 m are driven by the same oscillator at a frequency of 652 Hz. An observer originally positioned at one of the speakers begins to walk along a line vertical to the line joining the speakers.
A ball with a mass of 0.75 kg is thrown vertically into the air with an initial velocity of 10 m/s. establish the velocity of the ball when it hits the ground if it was initially released 2.0 m above the ground.
Find the resulting angular speed of the disk (in rad/s) and describe the direction of rotation.
What is the kinetic energy
What is the magnitude of the net force on the student.What is the magnitude of contact force on the student by the backpack.
A sealed cubical container 17cm on a side contains three times Avogadro's number of molecules at a temperature of 16°C. Find out the force exerted by the gas on one of the walls of the container.
How fast will the automobile be traveling at that instant.
A nonconducting thin layer carries charge with a uniform density of 8.40 µC/cm2. (a) What is the electric field 3.80 cm in front of the wall if 3.80 cm is small compared with the dimensions of the wall? magnitude and direction?
The cars stick together and move as a unit after the collision, at an angle of 47.0° north of east and at a speed of 6.36 m/s. Find out the speed of the 3000 kg car before the collision.
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