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
strojnjashka [21]
3 years ago
11

1. A woman driving in a car at 21 m/s pushes down on the gas pedal. 6 seconds later, she is moving at 36 m/s. What was her avera

ge acceleration?
Physics
1 answer:
Furkat [3]3 years ago
5 0

a=Vf-Vi/t=36-21/6=15/6=2.5m/s^2

You might be interested in
SOMEBODY PLEASE HELP!!! Indicate the reasons why the centripetal acceleration (and centripetal force) always point to the center
maxonik [38]
Well we know the correct answer cannot be "a" bcause velocity is tangent to the circlular path of an object experienting centripical motion. Velocity DOES NOT point inward in centripical motion.

we know the correct answer cannot be "b" because "t" stands for "time" which cannot point in any direction. so, time cannot point toward the center of a circle and therefore this answer must be incorrect.

I would choose answer choice "c" because both force and centripical acceleration point toward the center of the circle.

I do not think answer choice "d" can be correct because the velocity of the mass moves tangent to the circle. velocity = (change in position) / time. Therefore, by definition the mass is moving in the direction of the velocity which does not point to the center of the circle.

does this make sense? any questions?

3 0
3 years ago
Which of the following phenomena support the idea that light is a wave?
Pie

Answer:

Wave theory of light explains the phenomena of interference, diffraction, scattering, dispersion, polarisation etc. Complete solution: Around 1700, it was concluded by Newton that light was a group of particles. It was called corpuscular theory.

3 0
2 years ago
A football kick returner catches the ball just as a player from the opposing team dives to tackle him. At the time of impact, th
pochemuha

The total momentum of the players after collision is 130 kgm/s.

The given parameters:

  • <em>Initial momentum of the returner, </em>P_i_1<em> = 0 kgm/s</em>
  • <em>The initial momentum of the diving player, </em>P_i_2<em> = 130 kgm/s</em>

The total momentum of the players after collision is determined by applying the principle of conservation of linear momentum as follows;

P_f = P_i_1 + P_i_2\\\\P_f = 0 + 130\\\\P_f = 130 \ kgm/s

Thus, the total momentum of the players after collision is 130 kgm/s.

Learn more about conservation of linear momentum here: brainly.com/question/7538238

6 0
2 years ago
Which of the following is the best explanation of work
Hunter-Best [27]

Answer:

b

Explanation:

b

5 0
3 years ago
Read 2 more answers
Pls help. This is about heat. I got the answer, just need the working
Mars2501 [29]

Answer:

See below

Explanation:

You have to heat the calorimeter to 100 C  from 20 C

  this will take   .20 kg *    390 j /kg-C   *  80 C = <u>6240 j</u>

You have to heat the mass of water to boiling point (100 C ) from 20C

this will take    

    .50 kg * 4182 j/kg-C  * 80 = <u>167,280 j </u>

AND you have to add enough heat to boil off  .03 kg of water:

   .03 kg * (2260000 j/kg-C )  =<u> 67,800 j</u>

<u />

Power = joules / sec =  (6240 + 167280 + 67800) / 274.8 =<u> 878 watts </u>

<u />

<u>Your answer may differ just a bit for slightly different or rounded values of specific heat or heat of fusion for water .....</u>

7 0
2 years ago
Other questions:
  • The energy transfer diagram represents the energy of a person diving into a pool.
    7·2 answers
  • Which scenario best describes motion? a toy train in position 4 on a number line a race track that is 100 meters long a ball rol
    12·2 answers
  • The gravitational force exerted by the Sun on the Earth is __________ the gravitational force exerted by the Earth on the Sun.
    11·2 answers
  • An adiabatic nozzle is used to accelerate 6000 kg/hour of CO2 to 450 m/s. CO2 enters the nozzle at 1000 kPa and 500 C. The inlet
    15·1 answer
  • Hi, I am having issues with this physics question. I find it quite complicated to solve and I don't even have the answer to this
    9·1 answer
  • Please help me with 1,2,3,4,5,6
    12·1 answer
  • What is radiation? Explain in your own words.
    10·2 answers
  • 3. Which forces would exist in a free body diagram of this car accelerating along the highway?
    6·1 answer
  • Which letter explains why no machine is 100 percent efficient.
    15·1 answer
  • At the very end of 500 DAYS OF SUMMER, Tom (Joseph Gordon-Levitt) is so heartbroken by
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!