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ss7ja [257]
3 years ago
6

Use the drop-down menu to answer the question. according to "take a closer look", what type of lens is used to correct nearsight

edness?
Physics
1 answer:
Reil [10]3 years ago
6 0

Answer: concave lens

Explanation:

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The average speed and kinetic energy of the particles in a gas are proportional to the measured what of the gas
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Answer: Temperature

Explanation:

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3 years ago
A spring loaded toy shoots straight upward with a velocity of 4.5 m/s. Determine the maximum height it reaches. Determine the ti
Angelina_Jolie [31]

Recall that

{v_y}^2-{v_{0y}}^2=2a_y(y-y_0)

At its maximum height y_{\mathrm{max}}, the toy will have 0 vertical velocity, so that

-\left(4.5\,\dfrac{\mathrm m}{\mathrm s}\right)^2=2\left(-9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)y_{\mathrm{max}}

\implies y_{\mathrm{max}}=1.0\,\mathrm m

For the toy to reach this maximum height, it takes time t such that

\dfrac{0+v_0}2t=y_{\mathrm{max}}\implies t=0.46\,\mathrm s

which means it takes twice this time, i.e. t=0.92\,\mathrm s, for the toy to reach its original position.

The velocity of the toy when it falls 1.0 m below its starting point is

{v_y}^2-\left(4.5\,\dfrac{\mathrm m}{\mathrm s}\right)^2=2\left(-9.8\,\dfrac{\mathrm m}{\mathrm s^2}\right)(0-1.0\,\mathrm m)

\implies{v_y}^2=39.85\,\dfrac{\mathrm m^2}{\mathrm s^2}

\implies v_y=-6.4\,\dfrac{\mathrm m}{\mathrm s}

where we took the negative square root because we expect the toy to be moving in the downward direction.

6 0
3 years ago
The diagram shows particles that make up an atom. Which label best completes the diagram?
KonstantinChe [14]
The right answer is "Strong nuclear force"
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3 years ago
A rock is dropped into a well. If you hear a splash 14 seconds later what was its speed
grigory [225]

Answer:

14 seconds

Explanation:

because you dropped it and it takes 14 seconds

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___________________people can see objects that are close more clearly than objects that are far away.
kicyunya [14]
Near-sighted is the answer
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