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
hjlf
2 years ago
11

What is the difference between a star and a planet.

Physics
1 answer:
balandron [24]2 years ago
5 0

Answer:  In the planet there is life and the star is a store of energy where the planet gets its light, life and energy.

Explanation:

You might be interested in
How long does it took for 1000-watt microwave oven to do 20000 joules of work
svp [43]

Answer:

20 seconds

Explanation:

The equation for Power is:

Power = \frac{Work}{time}

Which means...

Time=\frac{Work}{Power}

We can plug in the given values into the equation:

Time = \frac{20000\ J}{1000\ W}

Time=20 \ s

3 0
3 years ago
Suppose the gravitational force between two spheres is 100 N. If the distance between the spheres is halved, what is the new gra
natima [27]

Answer:

The gravitational force becomes 4 times i.e 400N

Explanation:

8 0
3 years ago
Superman is riding his bicycle. At the base of a hill, he has a specific amount of kinetic energy. Then he coasts up the hill wi
algol13

Answer:

D. Friction and air resistance created heat on his trip up the hill.

Explanation:

Energy transformation from one form to another is not 100% efficient. This is the postulate of the first law of thermodynamics.

Most of the energy transformation is not purely 100%.

When energy is transformed, some are usually wasted.

  • In this case, in moving from bottom up, Superman produced some heat and encountered air resistance.
  • To reach the top, he must have overcome the resistance and produce enough heat to power him through.
  • This reduces the amount of potential energy that should have been the same as the kinetic energy down below.

7 0
3 years ago
Plrase help a little stuck here
kkurt [141]
(I'm lucky to have a computer ... It was only through the miracle of
modern digital technology that I was able to flip your photo right-
side-up to where I could read it.)

Here's how to figure out things like this:

The circle on the left side labeled ' <em>G</em> ' is the <em><u>G</u></em>enerator or battery
that powers this whole circuit and all the devices in it.  In order for
any device to work, you need to be able to set your pencil down at
the top of the Generator, and find a path through the circuit and
through that device, where current can flow all the way around to
the bottom of the Generator.  If you ever come to an open switch,
then current stops there, and you have to find another way through. 
If the path you found takes you back to the bottom of the generator but
it doesn't go through one of the devices, then that device doesn't work.

Look at the picture.  If you open switch  S-4, then Device-4 can't work,
because current can't go through it from one end of the Generator to
the other end.  But all of the other devices still work.

I can see  2  ways to turn off Device-3 with a single switch ... either
open switch S-5, or else open switch S-1.  Unfortunately, I think
either way will shut off all 5 devices.
7 0
3 years ago
A highway patrolman traveling at the speed limit is passed by a car going 20 mph faster than the speed limit. After one minute,
Oksi-84 [34.3K]

Answer:

It will take 40 seconds to catch the speeding car

Explanation:

Initial speed of the patrolman = 55 mph

after one minute speed of patrol man = 115 mph

now acceleration of patrolman is given by

a = \frac{v_f - v_i}{t}

a = \frac{115 - 55}{1/60} = 3600 m/h^2

now at this acceleration the distance covered by patrolman in "t" time is given as

d = v_i t + \frac{1}{2}at^2

d = 55t + 1800t^2

now we know the speed of the speeding car is given as

v' = (55+20) mph

now in the same time distance covered by it

d = 75 t

now since the distance covered is same

75 t = 55t + 1800 t^2

t = \frac{20}{1800} = \frac{1}{90} h

t = 40 seconds

7 0
3 years ago
Read 2 more answers
Other questions:
  • A rotating fan completes 1200 revolutions every minute. consider the tip of a blade, at a radius of 0.19 m. through what distanc
    11·1 answer
  • If two solutions have unequal concentrations of a solute, the solution with the lower concentration is called
    13·1 answer
  • A solid, uniform sphere of mass 2.0 kg and radius 1.7 m rolls without slipping down an inclined plane of height 5.3 m. what is t
    10·1 answer
  • What happens to a wave when it moves from one medium to another?
    6·1 answer
  • What is the electric potential at the point on the x-axis where the electric field is zero?
    9·1 answer
  • HELP ME !!!! A.S.A.P!!!!! WILL BE MARKED AS BRAINLEST!!! 15 POINTS!!!!
    9·2 answers
  • YO YO I NEED HELP!!!
    7·1 answer
  • Why does a lunar eclipse last for a few hours whereas a solar eclipse only lasts for a few minutes?
    15·1 answer
  • What is the rate of photosynthesis?
    8·1 answer
  • Before a rifle is fired, the linear momentum of the bullet-rifle system is zero.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!