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
3241004551 [841]
3 years ago
15

What is an example of convection currents? a. marshmallows toasting over a campfire b. a pot being heated by an electric burner,

feet getting hot when stepping across sand, a radiator emitting warm air and drawing in cool airs Only one choice on edge
Physics
2 answers:
Svetlanka [38]3 years ago
8 0

Answer:  B

Explanation:

Saw it on multiple sources and i got it right on Edge 2020

SCORPION-xisa [38]3 years ago
7 0

Answer:

B

Explanation:

because, convection is the transfer of heat between fluid substances/materials

You might be interested in
Amy wants to know whether or not an item will float when placed in a fluid. Which of the comparisons below, when true, will mean
o-na [289]

A. The object is made of stone or metal, which always sink.

B. The force of gravity is stronger than the buoyant force.

C. The buoyant force is stronger than the force of gravity.

D. The mass of the item is greater than its gravity

The answer is C

4 0
3 years ago
It is impossible to destroy __________.
fredd [130]
C.energy
The law of conservation of energy says that energy can neither be created nor destroyed.
6 0
3 years ago
Read 2 more answers
Please help me ejnfmwkefwefm i dont wanna fail
Rasek [7]

Answer:B

Explanation:

6 0
3 years ago
A certain digital camera having a lens with focal length 7.50 cmcm focuses on an object 1.70 mm tall that is 4.70 mm from the le
Crank

Answer:

a. 7.62cm

b. Real and inverted

c. 2.76 cm

d. 3450

Explanation:

We proceed as follows;

a. the lens equation that relates the object distance to the image distance with the focal length is given as follows;

1/f = 1/p + 1/q

making q the subject of the formula;

q = pf/p-f

From the question;

p = 4.70m

f = 7.5cm = 0.075m

Substituting these, we have ;

q = (4.7)(0.075)/(4.7-0.075) = 0.3525/4.625 = 0.0762 = 7.62 cm

b. The image is real and inverted since the image distance is positive

c. We want to calculate how tall the image is

Mathematically;

h1 = (q/p)h0

h1 = (7.62/4.70)* 1.7

h1 = 2.76 cm

d. We want to calculate the number of pixels that fit into this image

Mathematically:

n = h1/8 micro meter

n = 2.76cm/8 micro meter = 2.76 * 10^-2/8 * 10^-6 = 3450

3 0
3 years ago
A wheel accelerates from rest to 34.7 rad/s at a rate of 47.0 rad/s^2. Through what angle (in radians) did the wheel turn while
dem82 [27]

12.8 rad

Explanation:

The angular displacement \theta through which the wheel turned can be determined from the equation below:

\omega^2 = \omega_0^2 + 2\alpha\theta (1)

where

\omega_0 = 0

\omega = 34.7\:\text{rad/s}

\alpha = 47.0\:\text{rad/s}^2

Using these values, we can solve for \theta from Eqn(1) as follows:

2\alpha\theta = \omega^2 - \omega_0^2

or

\theta = \dfrac{\omega^2 - \omega_0^2}{2\alpha}

\:\:\:\:= \dfrac{(34.7\:\text{rad/s})^2 - 0}{2(47.0\:\text{rad/s}^2)}

\:\:\:\:= 12.8\:\text{rad}

7 0
2 years ago
Other questions:
  • If an asteroid is 4 AU from the Sun, what is the period of revolution around the Sun for the asteroid?
    13·1 answer
  • Assume an 8-kg bowling ball moving at 2m/s bounces off a spring at the same speed that it had before bouncing.What is the moment
    6·1 answer
  • The internal energy of a system....
    12·1 answer
  • Pure gold and silver have densities of 19,300 kg/m^3 and 10,500 kg/m^3, respectively. If a jeweler uses 0.25 cm^3 of metal to ma
    15·1 answer
  • The management information base (MIB) is a repository of data maintained at a managing entity site, providing the network manage
    6·1 answer
  • police force open a door with 879 N applied directly to a door by a battering ram. if the ram struck 80 cm away from the hinge ,
    15·1 answer
  • A tennis ball is dropped from 1.62 m above the
    15·1 answer
  • A sound wave has a frequency of 425 Hz. What is the period of this wave
    5·1 answer
  • Use the worked example above to help you solve this problem. The half-life of the radioactive nucleus _(88)^(226)text(Ra) is 1.6
    14·1 answer
  • Hi am struggling with specific latent heat questions:
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!