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
musickatia [10]
3 years ago
14

The driver of a car traveling at 30.5 m/s slams on the brakes so that the car undergoes a constant acceleration, skidding to a c

omplete stop in 4.5 s. What is his average acceleration?
-2.6 m/s^2
2.6 m/s^2
6.8 m/s^2
-6.8 m/s^2
Physics
1 answer:
dolphi86 [110]3 years ago
4 0

Answer:

-6.8 m/s²

Explanation:

Given:

v₀ = 30.5 m/s

v = 0 m/s

t = 4.5 s

Find: a

a = (v − v₀) / t

a = (0 m/s − 30.5 m/s) / 4.5 s

a = -6.8 m/s²

You might be interested in
__________ and __________ both agreed that childhood experiences play an important role in the development of oneself.
oksano4ka [1.4K]
The following answers in the blank could be Sigmund Freud who found the psychoanalysis and Karen Horney who is known to be a psychoanalyst. Both of them has the idea that childhood experiences is necessary and plays the important role in the individual as he or she grows.
8 0
3 years ago
Read 2 more answers
Speed is different from velocity because
shtirl [24]

Answer:

A. velocity has a direction .. .

with magnitude too but speed has only magnitude

6 0
3 years ago
Read 2 more answers
How many photons are absorbed during the dental x-ray?
MariettaO [177]
<span>E=hc/wav. len
E = (6.62 x 10^-34 x 3 x 10^8)/0.0275 x 10^-9
E = 7.22182 x 10^-15 J
To convert to eV divide by 1.6 x 10^-19
E = 7.22182 x 10^-15/1.6 x 10^-19 eV
E =45.36 x 10^3 eV
Th energy, E, of a single x-ray photon in eV is = 45.36keV.

Number of photons, n = total energy/ energy of photon
n = 3.85 x 10^-6/7.22182 x 10^-15
n = 5.33 x 10^8 photons </span>
8 0
3 years ago
Hii guys follow me please please.​
murzikaleks [220]
Heck yeah i'll follow!!!!!!
4 0
3 years ago
Why does atmospheric pressure decrease with altitude.
ella [17]

Answer:

<em>Earth's gravity pulls air as close to the surface as possible. ... As altitude increases, the amount of gas molecules in the air decreases—the air becomes less dense than air nearer to sea level. This is what meteorologists and mountaineers mean by "thin air." Thin air exerts less pressure than air at a lower altitude.</em>

5 0
3 years ago
Other questions:
  • A 65.0-kg woman steps off a 11.0-m diving platform and drops straight down into the water. 1) If she reaches a depth of 4.60 m,
    14·1 answer
  • What does a star color tell you about the amount of energy it emits?
    5·2 answers
  • How far away is mars?
    11·2 answers
  • a water wav e has frequency of 2hz and there are 3 meters between each crest on the wave. how fast is the wave moving
    12·1 answer
  • (Please Help! Match the sentence to the number down below! Please I'll give brainlist and points!)
    10·1 answer
  • The amount of oxygen in the reactants is 4 atoms. In the products, the oxygen is distributed to water (H2O) and O2 gas. Which co
    8·2 answers
  • Horizontal displacement?
    7·1 answer
  • Which is easier for a beginner? (This is for archery)<br><br> O long bow<br><br> O recurve bow
    5·2 answers
  • What is a risky behaviour​
    5·2 answers
  • If an object has a density of .9g/ml and a volume of 12ml what is the mass of the object
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!