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A device with a resistance of 200.0k is connected to a 10V battery. How much power does the device use?
a) 0.050 mW
b) 0.50 mW
c) 2000 kW
d) 20,000 kW
A molecule of DNA (deoxyribonucleic acid) is 2.09 µm long. The ends of the molecule become singly ionized: negative on one end, compute the effective spring constant of the molecule
A spring is stretched a distance of Dx = 40 cm beyond its relaxed length. Attached to the end of the spring is an block of mass m = 12 kg, which rests on a horizontal frictionless surface. what is the speed of the attached object
On a laboratory air table, a puck moving due north at 3.5 m/s collides with an iddentical puck moving at 2.0 m/s, 45 degrees S of W. What is the speed and direction of the second puck
In a classroom demonstration, a 79.2-kg physics professor lies on a "bed of nails." what is the average pressure at each contact
The second-order fringe of 610 nm light is observed at an angle of 12° when the light falls on two narrow slits. at what angle would we expect it to be observed
Suppose that a high-energy particle accelerator accelerates an electron to such great speed that its relativistic mass becomes as large as the rest mass of a proton. Calculate the speed of this electron
suppose you have a heat engine operating between 230 C and 100.0 c. it achieves 20.0% of the maximum possible efficiency(carnot Efficiency). what energy input will enable the engine to perform 12.0 kJ of work?
A block of mass m=3.15kg is pushed a distance d=2.05m along a frictionless horizontal table by a constant applied force of magnitude F=16.0N directed at an angle Theta=38.0 degrees below the horizontal
A 52.1-kg high-school student hangs from an overhead bar with both hands, What is the tension in each arm when the arms make an angle of 31.00 o with respect to the vertical
a boy whirls a small stone attached to a 1.5m string in a horizontal circle 2.0m above the ground. the string suddenly
How much force is the air exerting on the front cover of your textbook? (Assume that the width and the length of the book are 22.9 cm and 28.8 cm, respectively
Estimate the thickness of the Earth's atmosphere. From your chemistry class, you know that the most common speed of a nitrogen molecule is 640 m/s. What is the altitude
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