1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kodGreya [7K]
3 years ago
14

A burning piece of coal glows red on a lab table. A student wants to prevent the coal from transferring heat to him. He sets up

a metal shield between himself and the coal to prevent convection. Why will this not completely stop all of the heat transfer? The metal shield will heat up, and then heat the air on the student's side of the shield. The metal shield will cause more radiation to reach the student. The metal shield will not prevent heat transfer by conduction. The metal shield cannot block the flow of fluids.
Physics
2 answers:
Travka [436]3 years ago
6 0

Answer: Option (A) is the correct answer.

Explanation:

It is known that metals are good conductors of heat and electricity. As a result, they are able to pass on the heat in air or another substance.

For example, when a metal shield is placed between student and the coal to prevent conduction then transfer of heat will not stop completely.

This is because metal shield will transfer the heat into the air due to which air becomes hot and the student will feel the heat.

Thus, we can conclude that metal shield will not completely stop all of the heat transfer because the metal shield will heat up, and then heat the air on the student's side of the shield.

Dmitrij [34]3 years ago
4 0
A. The metal shield will heat up, and then heat the air on the student's side of the shield.
You might be interested in
A car weighing 12,000 N is parked on a 36° slope. The car starts to roll down the hill. What is the acceleration of the car?​
Delicious77 [7]

Answer: 5.8 m/s squared

Explanation: just got that question lol

4 0
3 years ago
Help with the number 2 question​
MArishka [77]

Answer:

It is frequently stated that the value of the acceleration due to gravity at the pole is larger than at the equator because the poles are closer to the center of the earth due to the earth's oblateness. ... The measured value is larger because the earth's density is not uniform but increases toward the center.

6 0
3 years ago
An elevator has a mass of 1000 Kg. What force is needed to accelerate it upward at a rate of 2 m/s/s?
zubka84 [21]

The force needed to accelerate an elevator upward at a rate of 2 m / s^{2} is 2000 N or 2 kN.

<u>Explanation: </u>

As per Newton's second law of motion, an object's acceleration is directly proportional to the external unbalanced force acting on it and inversely proportional to the mass of the object.

As the object given here is an elevator with mass 1000 kg and the acceleration is given as 2 m / s^{2}, the force needed to accelerate it can be obtained by taking the product of mass and acceleration.

                  \text {Force}=\text {Mass} \times \text {Acceleration}

                  \text { Force }=1000 \times 2=2000 \mathrm{N}=2 \text { kilo Newon }

So 2000 N or 2 kN amount of force is needed to accelerate the elevator upward at a rate of 2 m / s^{2}.

3 0
3 years ago
The source of the earth’s magnetic field is found in the _____.
telo118 [61]
The source of the earth's magnetic field is found in the ;LIQUID MAGNETIZED IRON IN THE CORE OF THE EARTH. The earth's magnetic field is believed to be generated very deep down in the earth's core as a result of molten iron which it contains. 
5 0
3 years ago
Read 2 more answers
Is bath oil a homologenous mixture?
DaniilM [7]
Examples: 
<span>Air </span>
<span>Blood </span>
<span>Mouthwash </span>
<span>Rubbing Alcohol </span>
<span>Peroxide </span>
<span>Hand-sanitizer </span>
<span>Perfume </span>
<span>Some bath gels </span>
<span>Coffee </span>
<span>Chicken or Beef Broth </span>
<span>Body Spray </span>
<span>Natural Oils </span>

<span>A heterogeneous mixture is a mixture where the components of the mixture are not uniform or have localized regions with different properties. </span>

<span>Examples: </span>
<span>Rocks </span>
<span>Oil and water </span>
<span>Soup </span>
<span>Pizza </span>
<span>Copper sulfate </span>
<span>Salsa </span>
<span>Chicken soup </span>
<span>Cottage cheese

hope that helped</span>
5 0
3 years ago
Other questions:
  • If the force of an object doubles and the mass also doubles, by what factor does the acceleration change?
    6·1 answer
  • If a compound forms by ionic bonding, which is not true?
    11·2 answers
  • Ice causes a crack to form in a rock. This is an example of
    11·1 answer
  • A 12-kg lead brick falls from a height of 1.9 m. (c) The brick falls onto a carpet, 2.0 cm thick. Assuming the force stopping it
    10·1 answer
  • A 230 kg steel crate is being pushed along a cement floor. The force of friction is 480 N to the left and the applied force is 1
    11·2 answers
  • A woman performs 2000 J of work in order to push a cart full of groceries 50 meters. How much force did she apply to the cart? *
    7·2 answers
  • All recorded measurements require a number followed by a _______ .
    5·1 answer
  • A .025 kg bullet is moving at 350 m/s when it hits and then passes through a 7 kg block of wood. After the bullet passes through
    10·1 answer
  • How can you prove that acceleration is a derived unit​
    5·2 answers
  • if a car is accelerating downhill under a net force of 3674 N, what additional force would cause the car to have a constant velo
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!