A flatbed truck is carrying a 20.0-kg crate along a level road. The coefficient of static friction between the crate and the bed is 0.400, and the coefficient of kinetic friction is 0.300

What is the maximum acceleration that the truck can have if the crate is to stay in place relative to the truck?
A) 8.00 m/s2 B) 3.92 m/s2 C) 196 m/s2 D) 78.5 m/s2 E) 7.84 m/s2


B

Physics & Space Science

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A glass tea kettle containing 500 g of water is on top of the stove. The portion of the tea kettle that is in contact with the heating element has an area of 0.090 m2 and is 1.5 mm thick

At a certain moment, the temperature of the water is 75°C, and it is rising at the rate of 3 C° per minute. What is the temperature of the outside surface of the bottom of the tea kettle? The thermal conductivity of glass is 0.840 W/(m•K). Neglect the heat capacity of the kettle. A) 39°C B) 92°C C) 120°C D) 86°C E) 77°C

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Pumped water storage has too many practical reasons why it cannot be done

What will be an ideal response?

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The gyromagnetic ratio

a.is 1 for the magnetic moment associated with the spin and 2 for the magnetic moment associated with the angular momentum. b.relates the Bohr magneton to the elementary charge. c. does not help explain the result of the Stern and Gerlach experiment. d. relates the magnetic moments of spin and angular momentum to the total angular momentum. e.gives the values of intrinsic spin quantum number of the electron as 1/2 and -1/2

Physics & Space Science

The purpose of an air bag in an auto is to

A. decrease the force applied to you during a collision. B. reduce your speed just before a collision. C. reduce the impulse on you during a collision. D. make your momentum change occur over a shorter time during a collision.

Physics & Space Science