Consider the energy transfers and transformations listed below in parts (a) through (e). For each part, ( i ) describe human-made devices designed to pro-duce each of the energy transfers or transformations and, ( ii ) whenever possible, describe a natural process in which the energy transfer or transformation occurs. Give details to defend your choices, such as identifying the system and identifying other output energy if the device or natural process has limited efficiency. (a) Chemical potential energy transforms into internal energy. (b) Energy transferred by electrical transmission becomes gravitational potential energy. (c) Elastic potential energy transfers out of a system by heat. (d) Energy transferred by mechanical waves does work on a system. (e) Energy carried by electromagnetic waves becomes kinetic energy in a system.
Consider the energy transfers and transformations listed below in parts (a) through (e). For each part, ( i ) describe human-made devices designed to pro-duce each of the energy transfers or transformations and, ( ii ) whenever possible, describe a natural process in which the energy transfer or transformation occurs. Give details to defend your choices, such as identifying the system and identifying other output energy if the device or natural process has limited efficiency. (a) Chemical potential energy transforms into internal energy. (b) Energy transferred by electrical transmission becomes gravitational potential energy. (c) Elastic potential energy transfers out of a system by heat. (d) Energy transferred by mechanical waves does work on a system. (e) Energy carried by electromagnetic waves becomes kinetic energy in a system.
Consider the energy transfers and transformations listed below in parts (a) through (e). For each part, (i) describe human-made devices designed to pro-duce each of the energy transfers or transformations and, (ii) whenever possible, describe a natural process in which the energy transfer or transformation occurs. Give details to defend your choices, such as identifying the system and identifying other output energy if the device or natural process has limited efficiency. (a) Chemical potential energy transforms into internal energy. (b) Energy transferred by electrical transmission becomes gravitational potential energy. (c) Elastic potential energy transfers out of a system by heat. (d) Energy transferred by mechanical waves does work on a system. (e) Energy carried by electromagnetic waves becomes kinetic energy in a system.
Assuming the normal angle for stairs in a house, 37.0˚ with the horizontal, what is Kevin’s acceleration down the stairs? The sled is always touching at least one stair so you can treat it the same as a ramp. The coefficient of kinetic friction between the sled and the carpeted stairs is 0.708.
A helicopter pulls up and back on the truck with a force of 5.78⋅10^4 N at an angle of 30.0˚ from the horizontal. The truck has a mass of 5.04⋅10^3 kg. The truck’s engine applies a force on the truck that is in the x direction causing the truck to accelerate at 2.09 m/s2 in x. A) What is the force the engine is exerting? B) What is the normal force acting on the truck? Assume no acceleration in y.
Mikasa and her allies, from Attack on Titan, uses omni-directional mobility gear (ODM gear) to move from place to place. The ODM gear launches out wires with grappling hooks they can use to swing through the city. Mikasa, who has a mass of 68.0 kg, holds herself in place not moving with two wires from the ODM gear, as shown below with θ1 = 39.3°. If the tension in the wire labeled T1 is 688 N, what tension, magnitude and direction, is needed in T2?
Chapter 8 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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