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3 years ago

Choose correct answer

Physics

2 answers:

dsp733 years ago

8 0

Answer: The answer would be the primary purpose is to construct a logical argument.

rodikova [14]3 years ago

7 0

C is the correct answer urwelcom

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A merry go round exerts a force of 1000 N on a rider on the

SVEN [57.7K]

Answer:

The radius of the circle made by the person on the merry go round is 74.55 meters

Explanation:

The given parameters are;

The force the merry go round exerts on the rider = 1000 N

The time it takes the merry go round to make one complete revolution = 15 seconds

The weight of the person = 750 N

The radius of the circle made by the person on the merry go round = r

We have;

$F_c = \dfrac{m \cdot v^2}{r} = m \cdot \omega ^2 \cdot r$

Where;

m = The mass of the person

v = The velocity of the person

$F_c$ = The centrifugal force acting on the person = 1,000 N

r = The radius of the circle made by the person on the merry go round

ω = Angular velocity = 2·π/15 rad/s

We have;

The mass of the person = The weight/(The acceleration due to gravity, g)

∴ The mass of the person = 750/9.81 ≈ 76.45 kg

By substituting the calculated and known values into the equation for the centripetal force, we have;

$F_c$ = m × ω² × r

1000 = 76.45 × (2·π/15)² × r

r = 1000/(76.45 × (2·π/15)²) = 74.55 m

The radius of the circle made by the person on the merry go round = r = 74.55 m.

3 0

3 years ago

What is the energy of photons emitted by the led at a frequency of 610 thz mcat?

Ksju [112]

The photon energy is the energy carried by a single proton.

The equation used for calculating photon energy is:

E = hc / λ

where h = Planck constant

c = speed of light and

λ = wavelength of photon

frequency = f = c / λ

replace c /λ with f in the equation of photon energy

E = hf

frequency = 610 thz = 6.1 x 10¹⁴hz

h = 6.26 x 10⁻³⁴ js

E = 6.26 x 10⁻³⁴ x 6.1 x 10¹⁴

<span>E = 3.8 x 10</span>⁻¹⁹ j

4 0

3 years ago

List at least 3 units of speed circle the unit of speed which is the SI unit

Stells [14]

Answer: SI Unit is meters per second(m/s)

Explanation:

The three units of speed are:

1. meters per second(m/s)

2. kilometers per hour(km/hr)

3. miles per hour(mph)

SI Unit is meters per second(m/s)

6 0

3 years ago

Electromagnetic waves are classified into forms such as radio waves, microwaves, and infrared waves, based on the amount of ener

Anna [14]

Answer: D) wavelength

Explanation:

The energy $E$ of an electromagnetc wave is given by the following formula:

$E=h.f$ (1)

Where:

$h$ is the Planck constant

$f$ is the frequency

Now, the frequency has an inverse relation with the wavelength $\lambda$ :

$f=\frac{c}{\lambda}$ (2)

Where $c$ is the speed of light in vacuum

Substituting (2) in (1) we have:

$E=\frac{hc}{\lambda}$ (3)

This means the amount of energy an electromagnetic wave carries depends on its wavelength (or its frequency), because the speed of light and $h$ are constant.

6 0

3 years ago

Read 2 more answers

Which of these statements did you include in your answer? check all that apply the two main parts of an atom are the nucleus and

aleksklad [387]

<u>Both given statements are true.</u> An atom has a nucleus, an electron cloud, and subatomic particles.

There are two main parts of an atom i.e. nucleus (protons + neutrons) and the electron cloud which is composed of three subatomic particles: electrons, protons, and neutrons.

An electron is a subatomic particle having a negative charge on it.

While protons are positively charged particles and are found in the nucleus of an atom due to strong nuclear forces.

On the other hand, a neutron, as the name suggests, is a neutral subatomic particle having no charge at all.

If you need to learn more about subatomic particles click here:

brainly.com/question/16847839

#SPJ4

4 0

1 year ago