PHYSICS HIGH SCHOOL

What is the velocity of a plane that traveled 3,000 miles from New York to California in 4.5 hours

Answers

Answer 1
Answer:

Answer:

v = 666.67 mph

Explanation:

It is given that,

Distance from New York to California is 3000 miles

Time taken fromNew York to California is 4.5 hours

We need to find the velocity of a plane. Velocity is equal to the distance over time. So,

v=(d)/(t)\n\nv=\frac{3000\ \text{miles}}{4.5\ \text{hour}}\n\nv=666.67\ \text{mph}

So, the velocity of the plane is 666.67 mph.

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A hair curling iron uses 13 watts of power. how long must it operate to do 1,040 joules of work?

Answers


Knowing the solution to the 4-watt night light, you ought to be able to do this one on your own.  But 5 points is 5 points, so here we go:

1 watt = 1 joule/second .

                            (1,040 joule) / (13 joule/second)

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Answers

1) a = Δv/Δt
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a = 7.33 m/s²

2) a = (0 - 4)/25
a = -0.16 m/s²

3) a = (9.6 - 12) / 0.9
a = -2.7 m/s²

4) a = (9-4)/0.5
a = 10 mi/h²

5) m/s²

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