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
yawa3891 [41]
3 years ago
15

Hello please help i’ll give brainliest

Physics
1 answer:
maw [93]3 years ago
8 0

Answer:mountains

Explanation:

You might be interested in
When fuel and air are compressed in the compression stroke, ...... a. each molecule of fuel is heated to its flash point b. each
alexira [117]

None of the choices is an appropriate response.

There's no such thing as the temperature of a molecule.  Temperature and
pressure are both outside-world manifestations of the energy the molecules
have.  But on the molecular level, what it is is the kinetic energy with which
they're all scurrying around.

When the fuel/air mixture is compressed during the compression stroke,
the temperature is raised to the flash point of the mixture.  The work done
during the compression pumps energy into the molecules, their kinetic
energy increases, and they begin scurrying around fast enough so that
when they collide, they're able to stick together, form a new molecule,
and release some of their kinetic energy in the form of heat.


7 0
3 years ago
Choose all the answers that apply. The sun: -is the largest star in our solar system -is the largest star in our galaxy
Hatshy [7]

-is made mostly of hydrogen and helium.

-will eventually run out of fuel and die.

-creates energy through nuclear reactions

8 0
3 years ago
Read 2 more answers
The public is not yet able to purchase cars powered by hydrogen fuel cells because engineers have to determin
Levart [38]

Answer:

The options are

A.on racetracks

B.in real-world conditions

C.in flooded environments

D.on closed courses

The answer is B. In real world conditions

The public is not yet able to purchase cars powered by hydrogen fuel cells because engineers have to determin

how the cars perform based on real world conditions.

This will ensure they encounter the real and first hand experiences about the challenges and also the advantages associated with using this type of fuel.

3 0
3 years ago
New 5G networks utilize millimeter-wave radiation. Millimeter-wave radiation refers to electromagnetic waves with frequencies in
seraphim [82]

Answer:

It corresponds to 1mm-10 mm range.

Explanation:

  • Electromagnetic waves (such as the millimeter-wave radiation) travel at the speed of light, which is 3*10⁸ m/s in free space.
  • As in any wave, there exists a fixed relationship between speed, frequency and wavelength, as follows:

        v = \lambda * f  (1)

  • Replacing v= c=3*10⁸ m/s, and the extreme values of f (which are givens), in (1) and solving for λ, we can get the free-space wavelengths that correspond to the 30-300 GHz range, as follows:

       \lambda_{low} = \frac{c}{f_{high}}  = \frac{3e8m/s}{300e9Hz} = 1 mm (2)

      \lambda_{high} = \frac{c}{f_{low}}  = \frac{3e8m/s}{30e9Hz} = 10 mm (3)

4 0
3 years ago
The element carbon exists in several different forms. Pure carbon can be found in the form of diamonds, coal, and the graphite i
Artist 52 [7]
B is false.

not all carbon atoms have 6 neutrons. Carbon 13 for example has 7 neutrons
5 0
3 years ago
Read 2 more answers
Other questions:
  • Select all that apply. Which of the following have energy stored as chemical energy? nuclear petroleum biomass geothermal
    13·2 answers
  • Insulators have very high .
    6·1 answer
  • Which of the following is a contact force?
    13·2 answers
  • The more particles that are hitting each other in a fluid, the less pressure is created. true of false
    14·1 answer
  • A car has a force of 2000N and a mass of<br> 1000kg. What is the acceleration of the<br> car?
    11·1 answer
  • Does a force need to force itself to force a force to force itself?<br>​
    13·1 answer
  • A crate of apples weighing 71.4 N sits at rest on a ramp that runs from the ground to the bed of a truck. The ramp is inclined a
    9·1 answer
  • Calculate equivalent resistance in the following between points P and Q​
    12·2 answers
  • Explain the universal law of gravity and it's calculate from as well as the value of g​
    12·1 answer
  • Can you help with this question about riding bikes
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!