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Q. Presume the needle moves 7.5 mm from its highest to its lowest position and it makes 26 stitches in 9.1 s. What is the highest needle speed?
In order to calibrate the strength of an Fe-55 source, many measurements of the radiation field are made with the same detector located at different distances.
A 44.20 cm diameter disk rotates with a constant angular acceleration of 2.84 rad/s2. It starts from rest at t = 0, and a line drawn from the center of the disk to a point P on the rim of the disk makes an angle of 57.3° with the positive x-axis at t..
A mass of 1.60 kg stretches a vertical spring 0.335 m. If the spring is stretched an additional 0.164 m and released, how long does it take to reach the (new) equilibrium position again.
Setting a world record in a 100m race, Maggie and Judy cross the finish line in a dead heat, both taking 10.0 s. Accelerating uniformly, Maggie took 2.0 s and Judy 2.5 s to attain maximum speed that they maintained for the rest of race.
If the surface of the water is calm and the pool is h = 1.52 m deep, find out the minimum diameter of the raft that would prevent the diamond from being seen.
A block of mass = 2.90 is attached to a string that is wrapped around the circumference of a wheel of radius = 7.20. The wheel rotates freely about its axis and the string wraps around its circumference without slipping. At first the wheel rotates..
A truck covers 40.01 m in 7.615 s while smoothly slowing down to final speed 1.40 m/s. What is the original speed and what is the acceleration.
While Voyager 2 sent back pictures of Neptune during its historic flyby of that planet in 1989, the spacecraft's radio signals travelled for 4 hours at the speed of light to reach Earth. How far away was the spacecraft.
Calculate change in kinetic energy
Two charges q1 = 1.1 10-8 C and q2 = -4.8q1 are placed 50 cm apart. Find the point along the straight line passing by the two charges at which the electric field is zero, as measured from q1.
Show that the average force exerted. What is your displacement after running 2.5 {rm km} on Strawberry Fields, 1.4 {rm km} on Penny Lane, and 4.2 {rm km} on Abbey Road.
A 78-kg man standing on a scale in an elevator notes that as elevator rises, the scale reads 834 N. What is the acceleration of the elevator.
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