Physics

Question 5. One 1,5V battery runs a portable MP3 player that draws 5,7mA of currentfor about six hours before it runs out.a) What is the resistance If the portable MP3 player?b) How much power is dissipated in the portable MP3 player?c) Find the energy delivered by the portable MP3 player?
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Mechanical energy conservation states thatThe total amount of energy will eventually be destroyed.Potential energy will be conserved, but kinetic energy will be destroyed.The total amount of energy, kinetic plus potential, remains the same.Kinetic energy will be conserved, but potential energy will be destroyed.Pls hurry Ill give 50 points
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Which feature of a balanced chemical equation demonstrates the law ofconservation of mass?O A. It has the same types of atoms on both sides of the reactionarrow.O B. It shows the reactants of a chemical reaction to the left of thereaction arrow.O C. It has coefficients to show how much of each substance achemical reaction uses.ThingD. It shows the products of a chemical reaction to the right of thereaction arrow.
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describe the components of soil
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The primary evidence that has led astronomers to conclude that the expansion of the universe is accelerating comes from __________.
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A 50.0 kg crate is pulled 375 N of force applied to a rope. The crate slides without friction. After being pulled 3.07 meters the crate has a velocity of 5.61 m/s. What is the angle (degrees) made by the rope with the horizontal?
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alcohol thermometer cannot measure the thermometer of boiling water ,why?
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A 1200 kg car moves due north with a speed of 15m/s. An identical car moves due east with the same speed of 15m/s what are the direction and the magnitude of the systems total momentum
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1 pointKinetic friction is defined as a force that acts between moving surfaces. Abody moving on the surface experiences a force in the opposite directionof its movement. A student is investigating the motion of a block slidingdown a ramp onto the floor. The diagram below shows the block at fivepoints during the investigation. The block is at rest at point V. The studentreleases the block so that it slides down the ramp and stops at point Z.Which of the following best explains where kinetic friction is acting on theblock?
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PLEASE HELP FOR PHYSICS!All objects exert a gravitational force on all other objects. This force is given by, F = GMm r2 , where the value of G = 6.673 1011 Nm2/kg2 , M is the mass of the heavier object, m is the mass of the lighter object, and r is the distance between the two objects.What is the force of gravity between two balls of mass 50 kg each if the distance between them is 25 m. Assume that there is no interference from any other gravitational field.
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A wave traveling at 230 m/sec has a wavelength of 2.1 meters. What is the frequency of this wave?
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Which of the following is a completely elastic collision?A. a ball rebounds against a wall, reversing its direction, but at only half the speed.B. Two balls collide, stick to each other, and move together after the collision.C. Two balls collide and move at a right angle to each other after the collision at a reduced speed.D. Two balls collide head on, each reversing its direction and traveling at half the speed.E. A ball with velocity v collides with a ball at rest; after the collision the first ball is at rest and the second ball has velocity v. I will mark brainliest
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A crane does 9,500 J of work to lift a crate straight up using a force of 125 N. How high does the crane lift the crate? 0. 013 m 76 m 9,400 m 1,200,000 m.
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The diagram shows the velocity-time graph for a car travelling in a straight line along a road. Calculate the acceleration between t = 2.0 s and t = 5.0 s.
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What is the work done in lifting 60 kg of blocks to a height of 20m
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A 66 kg student stands on a very light, rigid board that rests on a bathroom scale at each end as shown in (Figure 1).
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A person sitting in a chair with wheels stands up, causing the chair to roll backward across the floor. The momentum of the chair a. was zero while stationary and increased when the person stood. b. was greatest while the person sat in the chair. c. remained the same. d. was zero when the person got out of the chair and increased while the person sat.
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Would you please help me with this? I can't figure it out, please! I need to know what the E means!
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A 10kg object is 15 meters up a hill. Find its potential energy
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How long will it take a projectile to hit the ground if it is launched at 4.2 m/s off a 12.6 m high platform?
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I keep people warm I come in many different colors, styles, and materials. many people use me when they sit on a couch
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what is momentum?what is period of an oscillating body?what is friction?
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A vertical spring stretches 9.6 cm when a 1.3 kg block is hung from its end. (a) Calculate the spring constant. This block is then displaced an additional 5.0 cm downward and released from rest. Find the (b) period, (c) freque
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Jeremiah rides his bicycle 4 miles in 30 minutes. If he maintains this rate, how far will he ride in 3 hours?
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