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
Hoochie [10]
4 years ago
12

What is dark energy and what evidence do astronomers have that it is an important component of the universe?

Physics
1 answer:
PSYCHO15rus [73]4 years ago
8 0

Answer:

The existance of dark energy was suggested to help explain measurements, using Type Ia supernovae as distance indicators, that the expansion of the universe is speeding up and its acceleration requires a source of energy. Scientists suggested that It may be a new form of energy for which there is not yet a theoretical explanation. quantum mechanics predict that it may be the vacuum energy associated with "empty" space itself.

You might be interested in
Please help me asapp!!!!!!!!!!!!!!!!
Contact [7]

Answer:

Front weels

Explanation:

Because they are the one which select the direction of the car.

3 0
4 years ago
Read 2 more answers
In EXACTLY 13 words explain how global warming happens on Earth.
inysia [295]

By pollution rotting the air and making is worse for us to breath

8 0
4 years ago
Pls help me idk what to do
Alika [10]
The dot would be the earthquake epicenter. That is where the earthquake originated.
6 0
4 years ago
A cell phone weighing 80 grams is flying through the air at 15 m/s. What is its kinetic energy
Contact [7]

Answer:

The kinetic energy of the cell phone is 9J

Explanation:

The kinetic energy is the energy possessed by a body by virtue of motion.

The kinetic energy is expressed as

KE= 1/2m(v)²

Given data

Mass of cell phone m= 80g--to kg=80/1000= 0.08kg

Velocity of cell phone v= 15m/s

Substituting our given data we have

KE= 1/2*0.08(15)²

KE= (0.08*225)/2

KE=18/2

KE= 9J

8 0
3 years ago
You are 12 miles north of your base camp when you begin walking north at a speed of 2 miles per hour. What is your location, rel
liubo4ka [24]
If you walk at a pace of 2 miles per hour for 5 hours, you should have walked 10 miles. You would be 2 miles away from your base camp. 
8 0
4 years ago
Read 2 more answers
Other questions:
  • Technician A says that the diameter of a bolt is the same as the wrench size used to remove or install the fastener. Technician
    11·1 answer
  • A weightlifter lifts a 125-kg barbell straight up 1.15 m in 2.5 s. What was the power expended by the weightlifter?
    14·1 answer
  • A 0.5-kilogram piece of aluminum increases its temperature 7°C when heat energy (Q) is added. Set up the equation with the corre
    7·1 answer
  • 652-06-01-01-00_files/i0190000.jpg What has rubbing done to the charges on the objects shown in diagrams A and B?
    9·1 answer
  • How is sun related to nuclear, electromagnetic, and heat energy?
    8·2 answers
  • A 79 kg person sits on a 3.7 kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.3 cm in diameter
    8·1 answer
  • The transfer of thermal energy between two bodies which are at different temperatures. The si unit for this is the joule. Genera
    12·2 answers
  • According to Kepler, which planet travels the fastest?
    7·2 answers
  • A police siren of frequency fsiren is attached to a vibrating platform. The platform and siren oscillate up and down in simple h
    15·1 answer
  • True or false: Displacement is the total path traveled by an object
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!