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2 years ago

Trisha works for a roofing company and needs to move shingles from the ground to the roof.

Physics

2 answers:

belka [17]2 years ago

6 0

Answer:

Crane

Explanation:

Trisha works for a roofing company and needs to move shingles from the ground to the roof. She will use a crane to move the shingles. The simple machine in crane is pulley.

A pulley is a simple machine that consist of a wheel on an axle. An axle is used to provide support and to change the direction of motion.

So, she must use a crane which consists of a pulley.

Orlov [11]2 years ago

4 0

A pulley is used to hoist or raise objects.

Other simple machines, such as an inclined plane or lever, would be impractical

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1 year ago

Einstein’s general theory of relativity made or allowed us to make predictions about the outcome of several experiments that had

PtichkaEL [24]

Answer:

1. bending of light in gravitational fields.

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Explanation:

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3 years ago

An electric light is plugged into a 120-V outlet. If the current in the bulb is 0.50 A, how much electrical energy does the bulb

ioda

Answer:

= 54,000 Joules or 54 kJ

Explanation:

Electrical energy is given by the formula;

E = VIt; where V is the potential difference in volts, I is the current and t is the time in seconds.

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2 years ago

an electric device is plugged into a 110v wall socket. if the device consumes 500 w of power, what is the resistance of the devi

andreev551 [17]

Answer: R=24.2Ω

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P=V.i

P=R.i²

$P=\frac{V^{2}}{R}$