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Question1
A weight lifter pulls down on a bar associated to some weights via a pulley system. He rises in the air. A second weight lifter comments that first is not strong enough to lift the weights. The first lifter claims to be very strong, and asks for assistance to hold him down. The second lifter presses down on shoulders of the first, who is next able to move the weights. Who is acceptable? Why with reasons?
Question2
Two identical conducting spheres with dissimilar charges are separated by a fixed center-to-center distance of 0.2m. Firstly, spheres attract each other with a force of 1.20N. The spheres are brought into contact and then they are returned to their original positions. Now, it is found that spheres repel one another with a force whose magnitude is equal to that of initial attractive force. What are the original charges on each sphere?
Under an outdoor area "yellow" [Na lamp] light, a fiber is placed between but at the edge of two 3 cm glass slides. How thick is the fiber
What is the frequency of string that was tightened.How high does it rise above the ground.
An electron in an oscilloscope is accelerated as a result of the potential difference between the cathode and anode. The electron has negligible initial speed and a final speed of 4.60 107 m/s. Find the voltage drop from cathode to anode.
Polarized light goes through two Polaroid sheets. The angle between the two sheets is 50°. what is the angle between the original light and the first sheet
Planet Z is 12,000 km in diameter. The acceleration due to gravity on Planet Z is 7.0 m/s2.
Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most ductile metal, what is the area of the leaf in square meters
Radar is used to determine distances to various objects by measuring the round-trip time for an echo from the object. How far away is the planet Venus if the echo time is 1500 s
Starting from rest, a 2.2x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, What is the flea's speed when it leaves the ground
A mass m1 = 15.0 kg and a mass m2 = 11.5 kg are suspended by a pulley that has a radius of 10.2 cm and a mass of 3 kg, determine the tension in the left cord
Two bars of identical mass are at 32 °C. One is made from glass and the other from another substance. The specific heat capacity of glass is 840 J/(kg · C°).
Newton's universal constant of gravitation is G = 6.67 × 10-11 meters cubed (m3) per kilogram per second per second. The Sun's mass is M = 1.9891 x 10^30 kilograms. Earth's orbital period is P = 365.256366 days. Obtain the average radius of Earth's o..
A solid uniform 3.25kg cylinder, 60.0cm in diameter and 12.4cm long, is connected to a 1.50kg weight over two massless frictionless pulleys, How fast is the cylinder turning at this instant
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