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
Alex
3 years ago
10

Nearly all physics problems will use the unit m/s^2 for acceleration. Explain why the seconds are squared. Why isn't the unit gi

ven as m/s, as it is for speed
Physics
1 answer:
sertanlavr [38]3 years ago
6 0

Because acceleration is not speed, and speed is not acceleration. 
I'm sure you would not ask "Why isn't temperature given in acres,
as it is for area ?"  Speed and acceleration are different things, so
it's only natural that they have different units.


The magnitude (size) part of acceleration is:

         (how much speed changes) per second.

Are you speeding up ?
Are you traveling (2 meters per second) faster every second ?
Then your acceleration is

           (2 meters per second) per second .

When you write that phrase as an algebraic expression, it's

           (2 m/sec) / sec

and when you simplify that fraction, you get        2 m/sec² .


You might be interested in
A bowling sphere is sitting on the ground. One of your classmates
ikadub [295]

normal force because it is perpendicular to the surface

4 0
3 years ago
A beam of light traveling through a liquid (of index of refraction n1 = 1.47) is incident on a surface at an angle of θ1 = 59° w
frosja888 [35]

Answer:

(a) n_{2} = \frac{n_{1}sin\theta_{1}}{sin\theta_{2}}

(b) n_{2} = 1.349

(c) v_{1} = 2.04\times 10^{8}\ m/s

(d) v_{2} = 2.22\times 10^{8}\ m/s

Solution:

As per the question:

Refractive index of medium 1, n_{1} = 1.47

Angle of refraction for medium 1, \theta_{1} = 59^{\circ}

Angle of refraction for medium 2, \theta_{1} = 69^{\circ}

Now,

(a) The expression for the refractive index of medium 2 is given by using Snell's law:

n_{1}sin\theta_{1} = n_{2}sin\theta_{2}

where

n_{2} = Refractive Index of medium 2

Now,

n_{2} = \frac{n_{1}sin\theta_{1}}{sin\theta_{2}}

(b) The refractive index of medium 2 can be calculated by using the expression in part (a) as:

n_{2} = \frac{1.47\times sin59^{\circ}}{sin69^{\circ}}

n_{2} = 1.349

(c) To calculate the velocity of light in medium 1:

We know that:

Refractive\ index,\ n = \frac{Speed\ of\ light\ in vacuum,\ c}{Speed\ of\ light\ in\ medium,\ v}

Thus for medium 1

n_{1} = \frac{c}{v_{1}

v_{1} = \frac{c}{n_{1} = \frac{3\times 10^{8}}{1.47} = 2.04\times 10^{8}\ m/s

(d) To calculate the velocity of light in medium 2:

For medium 2:

n_{2} = \frac{c}{v_{2}

v_{2} = \frac{c}{n_{1} = \frac{3\times 10^{8}}{1.349} = 2.22\times 10^{8}\ m/s

5 0
2 years ago
Read 2 more answers
Audio frequency range of a human ear is 20Hz - 20000 Hz. Express the range in terms of time period ? Answer needed urgently. Pl.
Feliz [49]
Using the term c in this case is a little confusing. It is more generic to use a general velocity, v. That way, in this case, we know to use the speed of sound. 

wavelength*frequency=v 

wavelength_20Hz = (345 m/s)/(1/20s) 

<span>wavelength_20kHz = (345 m/s)/(1/20000s)


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
</span>
5 0
3 years ago
If a car with mass 750 kg is lifted to a height of 2.3 m how much gravitational potential energy is added to the car
Jlenok [28]

I found: 16,905J

Explanation:

The Gravitational Potential Energy will depend on the work done against gravity (weight, W=mg) to lift it at height h or:

U = mgh =750 * 9.8 *2.3 =16,905J

6 0
2 years ago
According to the work-energy theorem, the amount of work done can be determined using which formula?
Tema [17]
W = KE = 1/2m(v2f-v2i) also known as D just took the test
8 0
2 years ago
Read 2 more answers
Other questions:
  • What causes atoms to bond together<br> ?!?
    12·2 answers
  • What is the power of a light bulb that has<br> a resistance of 190 ohms in a 120 v circuit?
    12·2 answers
  • Why do the pipes in a steam-heating system need to be insulated?
    10·1 answer
  • Which one of the following parenting factors is associated with improved IQ scores in children?
    5·1 answer
  • Based on the law of conservation of energy, how can we reasonably improve a machine’s ability to do work?
    13·2 answers
  • During a thunderstorm, you should crouch under a tree for shelter. <br> a. True<br> b. False
    11·1 answer
  • How long will it take a sample of lead-212 (which has a half-life of 10.64 h) to decay to one-eighth its original strength?
    8·1 answer
  • Find the ratio of speeds of a proton and an alpha particle accelerated through the same voltage, assuming nonrelativistic final
    8·1 answer
  • Find the right answer please
    6·1 answer
  • The distance from the sun to Earth would be
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!