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
NARA [144]
3 years ago
5

explain how a convection current is set up in water. The explanation has been started for you: When the heating element is switc

hed on, the hot water nearest the element rises because...
Physics
2 answers:
Montano1993 [528]3 years ago
3 0
It is less dense than the water above it and so it the heated less dense water rises upwards to replace the denser water and the denser water falls below to the heating element below, and this also becomes less dense and the circle continues, thus setting up the convection current.

Similar principle is applied in convection current for land and sea breezes.
Kamila [148]3 years ago
3 0
It is less dense than the surrounding water
You might be interested in
"Influence" between bodies is reduced as the bodies are
azamat
Both particles and big objects will be influenced by each other less if they are moved further apart. 
4 0
3 years ago
Read 2 more answers
A plane travelling at 63 m/s[S] down a runway begins accelerating uniformly at 2.8 m/s?[S]. How far does it travel
AVprozaik [17]

Answer:

270 m

Explanation:

Given:

v₀ = 63 m/s

a = 2.8 m/s²

t = 4.0 s

Find: Δx

Δx = v₀ t + ½ at²

Δx = (63 m/s) (4.0 s) + ½ (2.8 m/s²) (4.0 s)²

Δx = 274.4 m

Rounded to two significant figures, the displacement is 270 meters.

6 0
3 years ago
Which device uses a rotating magnetic field to produce an electric current?
Kay [80]
<span>The correct answer is C) a motor.
In particular, we are talking about an AC motor, which produces an alternating current. In an AC motor, a coil is immersed in a rotating magnetic field. Due to the motion of the magnetic field,the angle between the direction of the field and the surface enclosed by the coil changes. As a result, the magnetic flux through the coil changes over time (the magnetic flux is given by:
</span>\phi=BAcos\theta<span>
where B is the intensity of the magnetic field, A is the area enclosed by the coil and </span>\theta<span> is the angle between the direction of B and the perpendicular to the plane of the coil). For Faraday-Newmann-Lenz law, this change in flux induces an electromotive force (emf) into the coil, according to:
</span>emf=- \frac{d \Phi}{dt}<span>
 where the numerator is the variation of magnetic flux and dt is the time interval. This emf in the coil produced an electrical current in the circuit.</span>
7 0
3 years ago
Read 2 more answers
How do you express 78,000 in scientific notation?
White raven [17]
The Answer is= 7.8 x 10^4
7 0
3 years ago
A mercury thermometer is used to measure the temperature of boiling water but why do you think the mountainous travel to cold re
melamori03 [73]

Because mercury freeze in cold temperatures

7 0
3 years ago
Other questions:
  • The ______ is between the mesosphere and the exosphere. troposphere stratosphere thermosphere exosphere
    8·2 answers
  • A 12 v automobile battery is connected to an electric starter motor. the current through the motor is 246
    9·1 answer
  • A ball thrown vertically is caught by the thrower after 5.1s. Find the maximum height the ball reaches.
    9·1 answer
  • SOMEONE PLEASE HELP ME ASAP PLEASE!!!!​
    13·1 answer
  • How to contact brainly
    5·2 answers
  • Jason took 6 hours to travel 540 km. For the first 140 km, he
    13·1 answer
  • Explain different types of thermometer and their thermometry substance​
    15·1 answer
  • How much force is required to accelerate a 0.10 gram mosquito at 20m/?
    7·2 answers
  • A 3,220 lb car enters an S-curve at A with a speed of 60 mi/hr with brakes applied to reduce the speed to 45 mi/hr at a uniform
    12·1 answer
  • An airplane accelerates from a velocity of 22 m/s to 40 m/s with an acceleration of 2 m/s2. How long does it
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!