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3 years ago

Which are examples of a medium?

Physics

2 answers:

guajiro [1.7K]3 years ago

6 0

Answer:

An example? I mean if we're going for an example, I'd say middle, Or balanced.

Ne4ueva [31]3 years ago

4 0

Answer:

One example of a medium is air.

Explanation:

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You considered the situation of moving a couch at a constant speed. You concluded that to move the couch at a constant speed, yo

Dmitry [639]

Answer:

The couch will remain stationary

Explanation:

Friction is the force that resist/opposes the motion. It is the force that has to e overcome before an object can move.

Since the frictional force of 50 N is required before the couch can move, applying 25 N can not overcome the frictional force of 50 N, so the couch will remain stationary.A force greater than 50 will be require to set the couch in motion

8 0

4 years ago

You wish to place a spacecraft in a circular orbit around the earth so that its orbital speed will be 4.00×103m/s. What is this

Levart [38]

Answer:

The radius of orbit= $2.49\times 10^7 m$

Explanation:

We are given that

Orbital speed= $4.00\times 10^3$ m/s

We have to find the radius of orbit of spacecraft.

We know that

Gravitational constant= $6.67\times 10^{-11}m^3/kgs^2$

Mass of earth= $5.972\times 10^{24} kg$

Orbital speed= $\sqrt{\frac{GM}{r}}$

Where G= Gravitational constant

M=Mass of earth

r=Radius of orbit

Substitute the values in the formula

$4\times 10^3=\sqrt{\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{r}$

Squaring on both sides

$16\times 10^6=\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{r}$

$r=\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{16\times 10^6}$

$r=2.49\times 10^7 m$

Hence, the radius of orbit= $2.49\times 10^7 m$

7 0

4 years ago

What is the wavelength of an electromagnetic wave?

gizmo_the_mogwai [7]

Answer: (A) The number of waves that pass a point in a certain amount of time.

Explanation:

Electromagnetic waves are categorized according to their frequency f or, equivalently, according to their wavelength λ = c/f. Visible light has a wavelength range from ~400 nm to ~700 nm.

Frequency: Is the number of waves that pass a certain point in a specified amount of time.

Trough: The low point of the wave cycle.

Wavelength: The distance between two successive peaks.

Electromagnetic wave: One of the waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity.

6 0

2 years ago

A plastic rod is rubbed with a cloth and becomes positively charged. After charging, the rod is held close to the suspended tabl

12345 [234]

Charges on the metal painted table-tennis ball gain charges from the positively charged rod and becomes positively charged

7 0

3 years ago

Liquids and gases transfer heat by ____.

vodka [1.7K]

Fluids always transfer heat by convection. So, your answer is B. That's how a oven works actually!

3 0

4 years ago

Read 2 more answers