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4 years ago

Explain the electromagnetic spectrum. Give examples

Physics

2 answers:

Vanyuwa [196]4 years ago

8 0

Here is a photo of the electromagnetic spectrum. What part of it did you need to explain?

yKpoI14uk [10]4 years ago

5 0

Answer:

Electromagnetic spectrum consists of range of waves having different frequencies and energy. It consists of photons of all energies. A series of high energy gamma rays to low energy microwaves forms electromagnetic spectrum. The spectrum contains waves in increasing order of the their frequency and decreasing wavelength.

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Find the density of a planet with a radius of 8000 m if the gravitational acceleration for the planet, gp, has the same magnitud

Naya [18.7K]

Answer:

Density = 3 x 10⁻⁵ kg/m³

Explanation:

First, we will find the volume of the planet:

$V = \frac{4}{3}\pi r^3\ (radius\ of\ sphere)\\\\V = \frac{4}{3}\pi (8000\ m)^3\\\\V = 2.14\ x\ 10^{12}\ m^3$

Now, we will use the expression for gravitational force to find the mass of the planet:

$g = \frac{Gm}{r^2}\\\\m = \frac{gr^2}{G}$

where,

m = mass = ?

g = acceleration due to gravity = 6.67 x 10⁻¹¹ m/s²

G = Universal Gravitational Constant = 6.67 x 10⁻¹¹ Nm²/kg²

r = radius = 8000 m

Therefore,

$m = \frac{(6.67\ x\ 10^{-11}\ m/s^2)(8000\ m)^2}{6.67\ x\ 10^{-11}\ Nm^/kg^2}\\\\m = 6.4\ x\ 10^7\ kg$

Therefore, the density will be:

$Density = \frac{m}{V} = \frac{6.4\ x\ 10^7\ kg}{2.14\ x\ 10^{12}\ m^3}$

<u>Density = 3 x 10⁻⁵ kg/m³</u>

4 0

3 years ago

List two ways of recording or measuring absolute time

enyata [817]

Answer:

Stop watch

Stop clock

Explanation:

Absolute time is time measured in definite periods such as minutes, days, and years. It can be measured uising stop watch or stop clock

7 0

3 years ago

Two compounds are standing at the same temperature. Compound "A" is evaporating more slowly than compound "B." According to the

Whitepunk [10]

I think that some options might have helped to answer the question. I am answering the question based on my research and knowledge. "Compound B may have a lower molecular weight" is the assumption that can be made according to the <span>Kinetic Molecular Theory. I hope the answer has come to your help.</span>

7 0

3 years ago

Read 2 more answers

A crate with a mass of 175.5 kg is suspended from the end of a uniform boom with a mass of 94.7 kg. The upper end of the boom is

kotykmax [81]

323.5 N is the tension in the cable.

Given

Mass of crate(M) = 175.5 kg

Mass of boom(m) = 94.7 kg

The tension, T in the cable can be calculated by taking moments of force about the central point of marked X.

The Angle of the boom with the horizontal can be calculated by

tanθ = 5/10

θ = tan⁻¹(5/10) = 26.56°

Angle of the boom with horizontal is 26.56°

The angle of cable with horizontal can be calculated by

tan B = 4/10

B = tan⁻¹(4/10) = 21.80°

Angle of cable with horizontal is 21.80°

Taking moments of force about the point X

(Mcosθ + mcosθ) 0.5 = T(sin(θ +B)1

(175.5 × cos 26.56 + 94.7 × cos 26.56 )× 0.5 = T (sin(26.56 + 21.80) X 1

By calculating, we get

Tension(T) = 241.68/0.747

Tension(T) = 323.5 N

Hence, 323.5 N is the tension in the cable.

Learn more about Tension here brainly.com/question/24994188

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8 0

2 years ago

What can pressure be measured by?

SOVA2 [1]

'Pressure' is (force) / (area).

The only choice with those units is #1 .

5 0

4 years ago