Physics

* what should be used to clean grease or carbon tracks from capacitors or coils that are used in magnetos?
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which of the following quantities represent mass? check all that apply. which of the following quantities represent mass?check all that apply. 12.0 lb l b 0.34 g g 120 kg k g 1600 kn k n 0.34 m m 411 cm c m
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what is the component vr of velocty vector v along the radial direction from the radar gun to the car
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a 100 ohm resistor is connected in series with a 300 ohm resistor. what is the equivalent resistance?
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speed up a frictionless ramp ( 30.03) by a horizontal force . what are the magnitudes of (a) and (b) the force on the crate from the ramp?
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a weight hanging from a spring will remain hanging until the weight is pulled down and released. when the weight is released the spring will bounce up and down. which of newton's laws explains why the spring will bounce?
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bob is pushing a box across the floor at a constant speed of 1.4m/s m / s , applying a horizontal force whose magnitude is 55n n . alice is pushing an identical box across the floor at a constant speed of 2.8m/s m / s , applying a horizontal force. a) what is the magnitude of the force that alice is applying to the box?
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the current through a lightbulb is 2.0 amperes. how many coulombs of leectric charge pass through ther luighbu,kb in one minute?
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quantum mottle is caused by a. excessive ma-s b. excessive kvp c. insufficient distance d. insufficient light
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a Toyota Celica, travelling initially at 26.9 m/s [S], comes to a stop in 2.61 s. The mass of the car with the driver is 1.18 103 kg. Calculate the cars acceleration.
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any helping hand will be appreciated ^^ Psychologists have described the human nervous system as the communication and control center for the body. The nervous system allows us to take in information from the environment, communicate the information to different parts of the body, and coordinate the body's response. The nervous system itself is made up of neurons, or nerve cells, that communicate with each other by receiving and transmitting electrochemical signals, called neurotransmission. All human behavior is made possible by the activity of individual neurons working together in the nervous system. Think about a simple action you do every day, like answering your phone. When you perform this routine act, what are the individual neurons in your nervous system doing to make it possible? a. Explain how the activity of individual neurons enables you to perform a simple action like answering your phone. Be sure to describe the main parts of a neuron, explain the unique function of each part, and describe how neurons use electrochemical signals for neurotransmission. Include details from class materials, readings, and research on the nervous system to support your discussion.
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a wheel of radius r and negligible mass is mounted on a horizontal frictionless axle so that the wheel is in a vertical plane. three small objects of mass im, m, and 2mi respectively are mounted on the rim of the wheel, as shown. if the system is in static equilibrium, what is the value of m in terms of m?
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Kyle, a 90.0 kg football player, leaps straight up into the air (with no horizontal velocity) to catch a pass. He catches the 0.430 kg ball precisely at the peak of his jump, when he is 0.589 meters off the ground. He hits the ground 0.0396 meters away from where he leapt. If the ball was moving horizontally when it was caught, how fast was the ball traveling?
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what average force is required to stop a 900 kg k g car in 7.0 s s if the car is traveling at 90 km/h k m / h ?
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a supernova explosion of a 3.2 x1031 kg star produces 1.0 x1044 j of energy. (a) how many kilograms of the star's mass are converted to energy in the explosion?
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A 1.20 kg copper rod resting on two horizontal rails 0.90 m apart carries acurrent I = 55.0 A from one rail to the other. The coefficient of static frictionbetween the rod and rails is s= 0.60.(a) What is the smallest vertical magnetic field B that would cause the rod toslide?(b) Suppose a B field is directed at some angle to the vertical , with the currentalong the rod directed into the page, as shown. Find an expression for B as afunction of for the case when the rod is just on the verge of beginning to slide.(c) Find the value of which yields the smallest value of B that would causethe rod to slide, together with the corresponding value of B.
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A 9.00 kg mass is moving to the right with a velocity of 14.0 m/s. A 12.0 kg mass is moving to the left with a velocity of 5.00 m/s. Assuming that these two balls have a head on collision and stick together, what will be the final velocity of the combination? (3.1 m/s)
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a parallel-plate capacitor has a plate separation of 4.00 mm. 1) if the material between the plates is air, what plate area is required to provide a capacitance of 3.00 pf? (express your answer to three significant figures.)
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what is the definition of current? the amount of charge that flows through a cross-section of wire per unit time. the amount of charge per unit length of wire.
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which is the correct unit to represent time?d) 7m b) 7m/h c) 7 s
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a double-slit with slit a width of 0.15 mm is placed 2.3 m from a viewing screen. how far is the first dark fringe from the middle screen when a light of wavelength 450 nm falls on the double-slit?
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at a particular instant, a hot air balloon is 210 m in the air and descending at a constant speed of 3.5 m/s. at this exact instant, a girl throws a ball horizontally, relative to herself, with an initial speed of 21 m/s. when she lands, where will she find the ball? ignore air resistance. (find the distance, in meters, from the girl to the ball.)
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can the flow near a cylindrical rod of infinite length suddenly set in motion in the axial direction be described by the method in example 4.1-l?
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A 750-kg roller coaster car drops from rest at a height of 90.0 m along a frictionless track. If the coefficient of kinetic friction due to braking along a horizontal track at the end of the ride is 0.720, over what distance does the car need to brake to come to a complete stop?
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