3 years ago

How fast does lightning move?

Physics

2 answers:

dangina [55]3 years ago

6 0

Answer:

about 186,000 miles per second

Explanation:

so your closest bet is probably 175 miles per second

Alecsey [184]3 years ago

5 0

Answer:

Correct answer is 90,000 miles PER SECOND

Explanation:

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10. b

11.d

12. b

13.e

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A student uses a spring loaded launcher to launch a marble vertically in the air. The mass of the marble is

GarryVolchara [31]

Answer:

Part a)

When spring compressed by 2 cm

H = 1.47 m

Part b)

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H = 5.94 m

Explanation:

Part a)

As we know that the spring is compressed and released

so here spring potential energy is converted into gravitational potential energy at its maximum height

So we will have

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so we have

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Part b)

Similarly when spring is compressed by 4 cm

then we have

$\frac{1}{2}kx^2 = mg(H + x)$

$0.5(220)(0.04)^2 = 0.003(9.81)(H + 0.04)$

so we have

$H = 5.94 m$

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4 years ago

A brick of mass 2.3 kg is lifted to a height of 1.9 m. How much gravitational potential energy is added to the brick? Accelerati

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