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kkurt [141]
3 years ago
7

 Will mark as Brainliest!! If possible, Please check these!!! Quiz and I need to pass!!! If you see anything wrong from my answe

rs, please let me know!! Give points for it!!!
5.09 Quiz: How Heat Moves

Question One: What are the ways that heat moves?

A) Heat only moves through conduction and radiation.

B) Heat moves through conduction, convection, and radiation.

C) Heat only moves through air currents.

D) Heat moves from a cold object to a warm object.

Answer I chose was B.

Question two: Convection requires______to transfer heat.

A) solids

B) fluids (liquids or gases)

C) insulation

D) the vacuum of space

Answer I chose was C.

Question three: What does an insulator do?

A) An insulator emits elctromagnetic radiation.

B) An insulator slows heat transfer.

C) An insulator cools a substance.

D) An insulator warms a substance.

Answer I chose was B.

Please check and/or answer!!

~Karleif Westsson
Physics
2 answers:
jarptica [38.1K]3 years ago
5 0
I think everything looks good but 2 might not be right, it might be B
m_a_m_a [10]3 years ago
5 0

#1). correct

#2). B.  Convection is the process of hot and cold fluids FLOWING up and down, carrying heat from place to place that way.  That means there's gotta be some gas or liquid to flow from place to place, else you gotta no convection.

#3). correct


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OLga [1]

Answer:

The scalar product of a and b is: a · b = |a||b| cosθ

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What characteristics of EM waves did you discover?
jarptica [38.1K]

The characteristics of electromagnetic waves typically represent as follows:

  • There are changes in the electric and magnetic fields simultaneously so that both fields have maximum and minimum values ​​at the same time and place.
  • The direction of the electric field and the magnetic field are perpendicular to each other. The direction of both is perpendicular to the direction of the wave propagation.
  • The shape of electromagnetic waves is transverse waves.
  • It has general wave characteristics like polarization, reflection, refraction, interference, and diffraction.
  • The amount of the electric field (E) is directly proportional to the magnitude of the magnetic field, with the relationship E = cB.
  • The universal constant of the velocity of electromagnetic waves in a vacuum is \boxed{ \ c = 3 \times 10^8 \ m/s. \ }
  • The speed at which electromagnetic waves propagate depends merely on the electrical and magnetic properties of the medium that it travels on.
  • Because electromagnetic waves do not contain an electric charge, they do not experience any possible deviation in the electric or magnetic fields.
<h3>Further explanation</h3>
  • Two physicists who contributed significantly to developing the concept of electromagnetic waves are Faraday and Maxwell around 1831-1864.
  • From the observations, Faraday suggested that changes in the magnetic field cause an electric charge to flow in the loop of wire, contributing in the emergence of an electric field.
  • Maxwell proposed a reverse process, which is a change in the electric field will generate a magnetic field.
  • As follows, according to Faraday's Law, changes in sinusoidal magnetic fields generate electric fields which also change sinusoidally.
  • Meantime, according to Maxwell's Hypothesis, changes in sinusoidal electric fields generate magnetic fields which also change sinusoidally.
  • Furthermore, there is a process of combining electric and magnetic fields that propagate in all directions called electromagnetic waves.
<h3>Learn more </h3>
  1. About vector components brainly.com/question/1600633
  2. Determine the shortest wavelength in electron transition brainly.com/question/4986277
  3. Particle's speed and direction of motion brainly.com/question/2814900

Keywords: the characteristics, electromagnetic waves, transverse, vacuum, electric fields, magnetic, perpendicular, propagation, Maxwell, Faraday, the speed, polarization, reflection, refraction, interference, and diffraction

4 0
3 years ago
Read 2 more answers
A sound wave has a frequency of 425 Hz. What is the period of this wave?
Serhud [2]
Period is 1/frequency
1/425 = 2.353ms
8 0
3 years ago
(a) Find the acceleration of B.<br>(b) Find the tensions, T1 and T2, in the strings.
Ann [662]

i believ that the answer would be

the acceleration of B is 0.2

6 0
3 years ago
Your heart pumps 80 g of blood with each beat. The blood starts from rest and reaches a speed of 0.60 m/s in the aorta. If each
Gala2k [10]

Answer:

d. 0.3 N

Explanation:

Force: This is defined as the product of mass of a body and its acceleration.

The S.I unit of Force is Newton (N).

Mathematically Force can be represented as,

F = ma .................. Equation 1

Where F = force, m = mass, a = acceleration.

also

a = (v-u)/t............... Equation 2

Where v = final velocity, u = initial velocity, t = time.

Given: v = 0.60 m/s, u = 0 m/s ( From rest), t= 0.16 s.

Substitute into equation 2

a = (0.60-0)/0.16

a = 3.75 m/s²

Also given: m = 80 g = 0.08 kg.

Substitute into equation 1,

F = 0.08(3.75)

F = 0.3 N.

Hence he average force = 0.3 N

The right option is d. 0.3 N

6 0
3 years ago
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