The number of cycles an oscillator makes per second is called the

Physics

1 answer:

loris [4]4 years ago

7 0

It is called the *frequency*

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A man, facing a high wall, notices that an echo is heard 4.0 seconds after he makes a sharp sound. After walking 200m directly t

cestrela7 [59]

Answer:2.4

Explanation:basically 2.4 = 2.500 kg and then we add 3.4 seconds in all of them 4.0 + 3.4 = 2.5 ok

4 0

3 years ago

An engine is designed to obtain energy from the temperature gradient of the ocean. What is the thermodynamic efficiency of such

rewona [7]

Answer:

0.035 (3.5 %)

Explanation:

The thermodynamic efficiency is given by:

$\eta = 1 - \frac{T_C}{T_H}$

where

$T_C$ is the cold temperature

$T_H$ is the hot temperature

In this problem we have

$T_C = 5 ^{\circ}C+ 273 = 278 KT_H = 15^{\circ}C+273 = 288 K$

So the efficiency is

$\eta = 1 - \frac{278 K}{288 K}=0.035$

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3 years ago

Explain why the mass and weight should not be used interchangeably?

Sauron [17]

Mass is a property of an object, a cloud of gas, a puddle of liquid, or a lump of goo, and doesn't necessarily change when the object moves to a different location or environment. It depends only on the object itself.

Weight is completely a product of what else is in the nearby location,so it can easily change. It's the result of the gravitational forces between two objects . . . the first one with the constant mass, and another one that also has mass. The forces between them, and therefore the weight, depend on both masses, AND on the distance between them.

4 0

4 years ago

You pull your little sister across a flat snowy field on a sled. Your sister plus the sled have a mass of 25 kg. The rope is at

erik [133]

Answer

Work done will be equal to 1229.296 J

Explanation:

We have given mass of the sister m = 25 kg

Angle between rope and ground $\Theta =38^{\circ}$