3 years ago

What does it mean that a material transmits waves?

Physics

1 answer:

Dmitry_Shevchenko [17]3 years ago

3 0

It is the 3rd choice

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10. Which of the following is an acceleration? a. 12 m/s2 down b. 5 m/s up c. 8N West

nadya68 [22]

Answer:

a. 12 m/s² down

Explanation:

Acceleration has units of length per time squared. Acceleration is a vector, so it also has a direction.

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3 years ago

When a positively charged body touches a neutral body, the neutral body will

PtichkaEL [24]

Become more positive instead of negative

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2 years ago

What is the kinetic energy of a 1200 kg object that is moving at a speed of 24m/s?

n200080 [17]

Here, K.E. = 1/2 * mv²

So, K.E. = 1/2 * (1200) * (24)²

K.E. = 1/2 * 1200 * 576

K.E. = 600 * 576

K.E. = 345,600 J

Hope this helps!

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3 years ago

Suppose astronomers built a 20-meter telescope. How much greater would its light-collecting area be than that of the 10-meter Ke

nirvana33 [79]

Answer:

4 times greater

Explanation:

Step 1: Calculate light-collecting area of a 20-meter telescope (A₁) by using area of a circle.

Area of circle = π*r² = $\frac{\pi d^{2}}{4}$

Where d is the diameter of the circle = 20-m

$A_{1} = \frac{\pi d^{2}}{4}$

$A_{1} = \frac{\pi (20^{2})}{4}$

A₁ = 314.2 m²

Step 2: Calculate light-collecting area of a 10-meter Keck telescope (A₂)

$A_{2} = \frac{\pi d^{2}}{4}$

Where d is the diameter of the circle = 10-m

$A_{2} = \frac{\pi (10^{2})}{4}$

A₂ = 78.55 m²

Step 3: divide A₁ by A₂

$= \frac{314.2 m^2}{78.55 m^2}$

= 4

Therefor, the 20-meter telescope light-collecting area would be 4 times greater than that of the 10-meter Keck telescope.

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3 years ago

states that the force times the distance on one side of a lever's fulcrum equals the force times the distance on the other side

andrey2020 [161]

Answer:

Explanation:

It is said to be in equilibrium about the fulcrum . It is the principle of moments.

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3 years ago