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Two small plastic spheres each have a mass of 1.9g and a charge of -52.0 nC. They are placed 3.0cm apart (center to center). A) What is the magnitude of the electric force on each sphere? B) By what factor is the electric force on a sphere larger than its weight?
a 65 rm kg student is standing atop a spring in an elevator that is accelerating upward at 3.0rm mrm s2. the spring
question a wheel starts from rest and rotates about its axis with constant angular acceleration. after 7.4 seconds have
Which one of the following statements is correct concerning the variation of pressure with depth in a static fluid? Which one of the following statements is correct concerning ahydraulic lift?
An electron drops from the L shell to the K shell and givesoff an X-ray with a wavelength of 0.0200 nm. What is the atomic number of this atom
In a purely inductive circuit of 36 mH, the freq is 71 Hz and the maxium voltage is 317 V. Find the rms current in the circuit
Find the maximum height reached by the 2.70 {rm kg} object. In addition, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57.
A ship at sea has its radio transmitting antenna at a 10 m height above the surface of the water. how far from the cliff must the ship be
A mountain climber looks up a slope and sees an avalanche ofboulders accelerating toward her. The boulders are initially60.0m above, moving at an initial speed of 2.00m/s and acceleratingat 4.00m/s^2.
A 0.09 kg arrow is pulled back in a bow. After being held still, it is let go, moving 25m/s after the 0.47 meters in which the arrow is in contact with the bow string. What work was done on the arrow by the bow string? What force was exerted by the a..
A 117-cm-long, 4.00g string oscillates in its n = 4 mode with a frequency of 200 Hz and a maximum amplitude of 5.50 mm. What is the tension in the string
A Tsunami has a speed of 56 m/s and a 250-km wavelength. How long do they have to run to safety
A freezer is used to freeze 3.0 Lof water completely into ice. The water and the freezer remain at aconstant temperature of T = 0°C. Determine the change in the entropy of the water
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