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
miskamm [114]
3 years ago
12

12. A frain moves from rest to a speed of 25 m/s in 30.0 seconds. What is its acceleration?

Physics
1 answer:
ziro4ka [17]3 years ago
6 0
  • initial velocity=u=0m/s
  • Final velocity=v=25m/s
  • Time=t=30s

\\ \tt\longmapsto Acceleration=\dfrac{v-u}{t}

\\ \tt\longmapsto Acceleration=\dfrac{25-0}{30}

\\ \tt\longmapsto Acceleration=\dfrac{25}{30}

\\ \tt\longmapsto Acceleration=0.8m/s^2

You might be interested in
If heat Q is required to increase the temperature of a metal object from 4 ∘C to 7∘C, the amount of heat necessary to increase i
alisha [4.7K]

Answer:

4Q

Explanation:

Case 1 :

m = mass of the metal

c = specific heat of the metal

\Delta T = Change in temperature = 7 - 4 = 3 C

Amount of heat required for the above change of temperature is given as

Q = m c \Delta T\\Q = m c (7 - 4)\\Q = 3 m c

Case 2 :

m = mass of the metal

c = specific heat of the metal

\Delta T = Change in temperature = 19 - 7 = 12 C

Amount of heat required for the above change of temperature is given as

Q' = m c \Delta T\\Q' = m c (12)\\Q' = (4)(3 m c)\\Q' = 4Q

Hence the correct choice is

4Q

6 0
3 years ago
Read 2 more answers
An easy 20 points + brainiest.
Papessa [141]

Answer:

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, Milky Way ;-;

4 0
2 years ago
8.How long is a day? A year?
prisoha [69]

Answer:

  • There are a total of 24 hours in a day
3 0
3 years ago
Read 2 more answers
Newton's First Law says that an object at rest will stay at rest, and an object in motion will stay in motion unless:
Verdich [7]

Answer: Acted on by equal forces in opposite direction

Explanation:

Newton's First Law says that every body continue in its state of rest or constant speed on a straight line unless being acted upon by an external force.

6 0
4 years ago
What qualifications do you need to be a research scientist?
Vedmedyk [2.9K]

The qualifications boil down to: College education.

In most university or industrial research organizations, you might be able to work there as a member of the team who doesn't get much pay or much respect, with research going on all around you directed by other people, after you've gotten you Master's degree.

But you really don't have a shot at leading anything, or having much to say about what's being researched or how, until you have a PhD degree in the field where you'd like to do the research.

(Did I mention how proud I was to be present about 6 weeks ago, in a land far away, when my daughter was awarded a PhD degree in Molecular Biology ? I didn't want to let you get away without hearing about that.)

5 0
3 years ago
Other questions:
  • 8. Monica took a train 30 miles south to Cincinnati. Then she took a different train 18 miles east. Draw a vector diagram showin
    14·2 answers
  • Determine whether each phrase describes speed or velocity. The displacement of an object during a specific unit of time: How fas
    15·2 answers
  • When the temperature of 2.35 m^3 of a liquid is increased by 48.5 degrees Celsius, it expands by 0.0920 m^3. What is its coeffic
    8·1 answer
  • If an opaque material appears to be green, then which of the following can be concluded
    9·2 answers
  • 2 questions that I am just curious about!!! WILL NAME YOU BRAINLIEST!!! Hope you can figure out!! Worth 11 points!!
    15·1 answer
  • water in the tank is 2.5 ft. Water enters the tank through a top port of diameter 6 in. at a velocity of 24 ft/s. The water leav
    7·1 answer
  • In two or more complete sentences, explain how you can prove that the number of degrees that the Moon rotates around the Earth e
    12·2 answers
  • When entering an expressway, in the acceleration lane you should: A search for a gap in traffic and adjust your speed to the spe
    13·1 answer
  • an object of mass 8 kg is whriled round in a vertical circle of radius 2m with a constant speed of 6m/s .Then the maximum and mi
    15·1 answer
  • Tick (3) the correct statement about electrostatic charges.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!