3 years ago

What does the speed of a wave on a string depend upon

Physics

1 answer:

Pie3 years ago

5 0

Answer: This depends on the tides on earth cause by the moon

Explanation: because tides occur daily

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How much of the Moon is always illuminated one time? Explain your answer.

Natalija [7]

Answer:

50% of it .

Explanation:

50% of it is illuminated by the Sun.

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3 years ago

Which of the following is an example of kinetic energy?

Elza [17]

The answer is C) a rolling bowling ball because kinetic energy is the energy of movement and potential energy is the energies of the others, since there are not in movement. i hope this helps.

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3 years ago

A pole-vaulter is nearly motionless as he clears the bar, set 4.2 m above the ground. He then falls onto a thick pad. The top of

Inessa05 [86]

initial height of the pole vaulter = 4.2 m

height of the pole vaulter just before it touch the pad = 80 cm

so the total displacement of pole vaulter just before he will touch the pad = 4.2 - 0.80 = 3.4 m

now by kinematics

$v_f^2 - v_i^2 = 2a d$

$v_f^2 - 0^2 - 2* 9.8*3.4$

$v_f^2 = 66.64$

$v_f = 8.16 m/s$

now after this he will come to rest after compressing the pad by 50 cm

so again we can use kinematics to find its acceleration

$v_f^2 - v_i^2 = 2 a d$

$0 - 8.16^2 = 2*a*0.50$

$a = -66.64 m/s^2$

so here its acceleration will be - 66.64 m/s^2

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3 years ago

Distance is a vector quantity ... true or false

Elena-2011 [213]

Answer:False
Reason:

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3 years ago

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What is the iodide ion concentration in a solution if the addition of an excess of 0.100 m pb(no3)2 to 42.9 ml of the solution p

Katen [24]

Moles Pbl2 = 0.8628 g : 461.01 g/mol = 0.001871

moles I = 2 x 0.001871 = 0.003742

[I-] = 0.003742/ 0.0429

= 0.0872 M

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3 years ago