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Physics

Clara

Find the speed of sound in air at 0 ∘C (1100 ft/s) in m/s

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Physics

Abraham

Explain how a mug of tea is heated in a microwave oven. Explain why the tea gets hotter than the mug

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Physics

Keagan Beck

Fa car's power output is increased, its efficiency:

is increased

is decreased

may be either increased or decreased

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Physics

Liam

A particle is moving along a projectile path where the initial height is 96 feet with an initial speed of 16 feet per second. What is the maximum height of the particle?

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Physics

Madilyn Blevins

Explain the scientific theory of plate tectonics by describing how the movement of earths crystal plates cause both slow and rapid changes in earths surface, including volcanic eruptions, earthquakes, and mountain building

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Physics

Imogen

Two trains leave the station at the same time, one heading east and the other west. the eastbound train travels at 80 miles per hour. the westbound train travels at 90 miles per hour. how long will it take for the two trains to be 306 miles apart?

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Physics

Esther Barnes

Calculate the force of friction for a 5kg aluminum block being pulled with constant velocity (uniform motion) across a horizontal steel plank ...?

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Physics

Rush

Which part of a molecule provides energy for life processes

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Physics

Hadley

A hair dryer draws a current of 10 A plugged into a 120 V outlet. What is the resistance of the hair dryer?

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Physics

Kylee Green

Which of the following statements describe the transfer of energy?

-Collisions of atoms causing nuclear reactions

-A car speeding up from 5 mi/hr to 40 mi/hr

-A weightlifter lifting 100 lb. bell bar from his chest to a certain height

-A transformer stepping down the voltage of electricity in power lines

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Physics

Charlize Davies

In the rectangle to the left, if

the perimeter was 90

inches, what would the

value of x be?

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Physics

Bentley

A book is sitting on a shelf that is 3.0 meters off the ground. Kinetic energy is found using the formula 1/2 times mass times speed. Potential energy is found by taking mass times g times height, with g as the constant, 9.8 m/s squared. What is needed to determine the mechanical energy used to move this book?

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Physics

Josie Strickland

Write a brief history on judo

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Physics

Priscilla Jefferson

What best describes a transverse wave?

A) The displacement of particles is opposite to the direction of wave motion.

B) The displacement of particles is perpendicular to the direction of wave motion.

C) The displacement of particles is in the same the direction of wave motion.

D) The displacement of particles is parallel to the direction of wave motion.

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Physics

Lyons

Air flows through a converging nozzle with inlet cross section area of 0.4 m2 with a velocity of 10 m/s. Calculate the velocity of air at outlet with cross sectional area of 0.3 m2. (incompressible)

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