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
Arada [10]
3 years ago
15

Of roller coaster car rapidly picks up speed as it rose down a slope as it starts down the slope, its speed is 4m/s . But 3 seco

nds later at the bar got bottom of the slope, is speed is 22m/s. What is its average acceleration?
Physics
1 answer:
lora16 [44]3 years ago
8 0

6 m/s ^2

Explanation:

Acceleration: the rate of change of velocity per unit of time.

a = (v − u) /t

a = (22 m/s − 4 m/s )/3s = 6 m/s ^2

You might be interested in
What do you think a divergent (constructive) boundary is? How do plates interact with each other?
skad [1K]

Answer:Divergent boundaries are areas where plates move away from each other, forming either mid-oceanic ridges or rift valleys. Tectonic plates can interact in one of three ways. They can move toward one another, or converge; move away from one another, or diverge; or slide past one another, a movement known as transform motion. All plate margins along which plate movement is occurring have one thing in common—earthquakes.

6 0
3 years ago
Read 2 more answers
On Monday when you ask your friend if you should dump The person your day and she said yes now on Wednesday she says no since yo
emmainna [20.7K]

Answer:

Her answer is not reliable.

Explanation:

Reliability and validity are two major concepts that are used to assess the standard and quality of response/research.

While validity of an instrument is the idea that the instrument measures what it intends to measure, reliability is all about consistency and whether or not results could be replicated.

While your friend's answer may be valid, it can't reliable because of the differences in her response within a short time.

3 0
3 years ago
The ____________ is a phenomenon that occurs when electrons are ejected from a piece of metal after light has been shined onto t
Nikolay [14]

Answer:

Photoelectric Effect

Explanation:

Photoelectric Effect is a phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation.

6 0
2 years ago
Carol is farsighted ( presbyopia) and cannot see objects clearly that are closer to her eyes than about meter. She sees objects
egoroff_w [7]

Answer:

1.0 dioptres

Explanation:

Farsightedness is an eye defect in which a person can see far objects clearly but not near objects. That implies that the patients' near point is farther than 25cm which is the normal least distance of distinct vision.

Farsightedness results from the eyeball being too long or the crystalline lens not being sufficiently converging.

Carol is farsighted with a near point of about a meter (100cm). We desire to make a lens to enable her near point be reduced to about 50cm. The focal length and power of this lens is calculated in the image attached.

The power of a lens is the inverse of its focal length in meters hence the 100 in the formula for power of the lens.

7 0
3 years ago
Read 2 more answers
Jupiter is 5.2 AU from the sun on average. How long is one year on Jupiter?
velikii [3]

Answer:

12 years

Explanation:

12 years is correct because how long is Jupiter one year is 12 years

3 0
2 years ago
Other questions:
  • You have a 7-m-long copper wire. You want to make an N-turn current loop that generates a 6.582 mT magnetic field at the center
    5·1 answer
  • PLS ANSWER What is the difference between direct and alternating current? (Be sure to write in complete sentences starting with
    10·1 answer
  • How is color related to wavelength?
    8·1 answer
  • Help!!! Pleaaaaaseee SOS!!
    14·1 answer
  • In a machining operation that approximates orthogonal cutting, the cutting tool has a rake angle =100 . The chip thickness ratio
    14·1 answer
  • Free!!!!!!!!!!!!!!!!!!!​
    5·1 answer
  • a crane lifts a 75 kg mass at a height of 8m. calculate the gravitational potential energy gained by the mass (g= 10N)
    11·1 answer
  • 4. A weightlifter raises a mass mat a constant speed to a height h in time t. Which of the following
    10·1 answer
  • CCL4 is Non polar and NH3 is Polar? Why?​
    12·1 answer
  • Type the correct answer in the box.
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!