3 years ago

Which describes how electromagnetic waves travel?

Physics

1 answer:

Slav-nsk [51]3 years ago

7 0

Answer:

Travels through solid materials, and air.... but it can also travel through the vacuum of space

Explanation:

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The ideal mechanical advantage of an inclined plane is 3.5, and its efficiency is 0.6. What is the mechanical advantage of the i

Nadya [2.5K]

Mechanical advantage = ideal mechanical advantage x efficiency = 3.5 x 0.6 = 2.1
The mechanical advantage of the inclined plane is 2.1

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3 years ago

Sprinting near the end of a race, a runner with a mass 63 kg accelerates from a speed of 25 m/s to a speed of 26 m/s in 54 s. To

gavmur [86]

Answer:

1.1655 N

Explanation:

Given that,

Initial speed, u = 25 m/s

Final speed, v = 26 m/s

Time taken, t = 54 s

So, Applying equation of motion as:

$v=u+at\\\Rightarrow a=\frac{v-u}{t}\\\Rightarrow a=\frac{26-25}{54}\ m/s^2\\\Rightarrow a=0.0185\ m/s^2$

According to the Newton's second law of motion:-

$Force=Mass\times Acceleration$

Mass = 63 kg

So,

$Force=63\times 0.0185\ kgm/s^2$

<u>Force = 1.1655 N</u>

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4 years ago

6) The temperature of 10 kg of a substance rises by 55°C when heated. Calculate the

Anna [14]

Answer:

121

Explanation:

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3 years ago

Which of the following is the best way to prepare for working in the health science environment

olga nikolaevna [1]

Answer:

Intern in a doctor's office.

Explanation:

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3 years ago

n this experiment, you will measure mass and volume of various sport balls, both regularly shaped ball and irregularly shaped. W

pentagon [3]

Explanation :

Density of an object can determine using mass and volume. We can measure mass and volume of various sports ball, both regular shaped ball and irregular shaped ball.

Density for regularly shaped ball and that of irregularly shaped ball is different.

Suppose that mass of an object is 100g and the volume is $2000\ cm^3$ . So, using this data we can find density of that object as

$density=\frac{mass}{volume}$

$\rho =\frac{100}{2000}$

$\rho =0.05\ g/cm^3$

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4 years ago

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