Physics

Nathan drops marbles down two ramps that have different lengths. It takes the marbles 10 seconds to reach the bottom of both ramps. Which statement is TRUE?
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Computers A and B implement the same ISA. Computer A has a clock cycle time of 200 ps and an effective CPI of 1.5 for some program and computer B has a clock cycle time of 250 ps and an effective CPI of 1.7 for the same program. Which computer is faster and by how much?
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What is the angular velocity of the second hand on a clock? (Hint: It takes the second hand 60 seconds to rotate 2 radians. Divide the number of radians by the number of seconds so that your answer has units of radians/second.)
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an experiment was done to see which colored sand would heat up the most when placed in the sun. The sand samples were white, red, green, and black. allsamples were the same amount placed in independent containers left in the sun the same amount of time and the temperature was measured with the same thermometer. what is the independent variable the dependent variable the control and the constant?
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The description for a certain brand of house paint claims a coverage of 475 ft/gal. (a) Express this quantity in square meters per liter. (b) Express this quantity in an SI unit. (c) What is the inverse of the original quantity?
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The plates of a parallel-plate capacitor are 3.00 mm apart, and each carries a charge of magnitude 79.0 nC. The plates are in vacuum. The electric field between the plates has a magnitude of 5.00 x 10^6 V/m.Part A) What is the potential difference between the plates?Part B) What is the area of each plate?Part C) What is the capacitance?
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A book rests on the shelf of a bookcase. The reaction force to the force of gravity acting on the book is 1. The force of the shelf holding the book up. 2. The force exerted by the book on the earth. 3. The weight of the book. 4. The frictional force between book and shelf. 5. None of these.
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A mechanical engineer launched an arrow with a speed of 800.0 m/s at an angle of 75.0 degree to the horizontal . If it landed on a target 450.0 m away at the same height from which it was fired , for how long was the arrow in the air ?
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A 975-kg elevator accelerates upward at 0.754 m/s2, pulled by a cable of negligible mass. Find the tension force in the cable.
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2. How does the medium vibrate in a transverse wave?A at right angles to the direction the wave travelsB with half the force of the energy providedC parallel to the direction the wave travelsD with twice the force of the energy provided
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A transverse wave on a long horizontal rope with awavelength of 8 m travels at 2 m/s. At t= 0, aparticular point on the rope has a verticaldisplacement of +A, where A is the amplitude ofthe wave. At what time will the verticaldisplacement of this same point on the rope be -A ?
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An electric motor rotating a workshop grinding wheel at a rate of 44.2 rev/min is switched off with a constant deceleration of 2.69 rad/s 2 . How long does it take for the grinding wheel to stop?
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A brass lid screws tightly onto a glass jar at 20 degrees C. To help open the jar, it can be placed into a bath of hot water. After this treatment, the temperature of the lid and the jar are both 60 degrees C. The inside diameter of the lid is 8.0 cm at 20 degrees C. Find the size of the gap (difference in radius) that develops by this procedure.
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An object falls a distance h from rest. If it travels 0.540h in the last 1.00 s, find (a) the time and (b) the height of its fall.
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I'm big boi confused.A beam of light traveling in air enters a substance. If the angle of incidence is 35 and the angle of refraction is 25 , what is the index of refraction of the substance?n1sin(theta)1=n2sin(theta)2 So would it be like 1.008*sin(35)=n2*sin(25) ????
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You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the "oars") toward you, it moves a distance of 1.5 m in a time of 1.0 s. The readout on the display indicates that the average power you are producing is 82 W. What is the magnitude of the force that you exert on the handle?
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On February 15, 2013, a superbolide meteor (brighter than the Sun) entered Earths atmosphere over Chelyabinsk, Russia, and exploded at an altitude of 23.5 km. Eyewitnesses could feel the intense heat from the fireball, and the blast wave from the explosion blew out windows in buildings. The blast wave took approximately 2 minutes 30 seconds to reach ground level. The blast wave traveled at 10 above the horizon. (a) What was the average velocity of the blast wave? (b) Compare this with the speed of sound, which is 343 m/s at sea level.
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A large box of mass M is pulled across a horizontal, frictionless surface by a horizontal rope with tension T. A small box of mass m sits on top of the large box. The coefficients of static and kinetic friction between the two boxes are s and k, respectively.Find an expression for the maximum tension T max for which the small box rides on top of the large box without slipping.
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2. Karen wants to know where in her garden a basil plant will grow the best. She thinks a basil plant will grow best in the corner of the garden that gets the most sunlight. To test her hypothesis, she decided to plant several groups of basil in her garden.Which of the following variables should Karen change from one group of basil plants to the next?A. the amount of water she gives the plantsB. the location of the plantsC. the height of the plantsD. the type of plants
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refractive index of Glass sample is 1.52 and date of Ruby is 1.71 if the speed of light in vacuum b 3 into 10 to the power 8 metre per second find the speed of light in glass in Ruby and also calculate the refractive index of air with respect to glass
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Solve for the missing values using the inverse squarelaw. Round to the thousandths (0.001) place.50 pointssss!!!!SHOW WORK PLS
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In a single wire, how much current would be required to generate 1 Tesla magnetic field at a 2 meter distance away from the wire?
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The gravitational force exerted by a proton on an electron is 2x1039 times weaker than the electric force that the proton exerts on an electron? True or False? explain.
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A woman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. The book has a mass of m = 1.3 kg and the coefficient of static friction between her hand and the book is s = 0.69. What is the weight of the book in Newton?
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