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
kumpel [21]
3 years ago
12

A person running down the hallway at a velocity of 4.2 m/s comes to a stop in a time of 1.8 seconds to avoid hitting the wall. W

hat was the acceleration of the person?
A.) 7.6 m/s/s
B.) -7.6 m/s/s
C.) 2.3 m/s/s
D.) -2.3 m/s/s
Physics
2 answers:
kumpel [21]3 years ago
6 0
Hshshshhshdhdhdhdhddhdhdhdhdhdh
adoni [48]3 years ago
3 0

Answer:

It's not -7.6

Explanation:

All I can tell you

You might be interested in
An instrument used to detect a static electric charge is called an
Eddi Din [679]
It is B. false that an instrument used to detect a static electric charge is called an ammeter. It is actually called an electroscope. Ammeter measures current. 
7 0
3 years ago
Read 2 more answers
The radius of our clock face is 9.2cm. It is 8:44; we are done at 9:11. How far will the minute hand (the larger one) travel?
gogolik [260]

Answer:

9:36 and how far it will travel is 26 minutes

8 0
2 years ago
What is the asthenosphere made out of?
liraira [26]
The correct answer is A. Solid Rock
6 0
3 years ago
If the speed of a wave doubles while the frequency remains the same, it means
sattari [20]

Answer:

Explanation:

Velocity of a wave is describe as

velocity =Frequency × Wavelength

Mathematically

v = fλ

Hence, Frequency, F = v / λ

Wavelength λ = v/f

So, if the frequency is kept constant, wavelength of the wave becomes directly proportional to velocity of the wave.

And this implies that, as the speed double, the wavelength is double.

5 0
3 years ago
The electric field in a region of space increases from 0 to 2150 N/C in 5.00 s. What is the magnitude of the induced magnetic fi
Feliz [49]

To solve this problem we will use the Ampere-Maxwell law, which   describes the magnetic fields that result from a transmitter wire or loop in electromagnetic surveys. According to Ampere-Maxwell law:

\oint \vec{B}\vec{dl} = \mu_0 \epsilon_0 \frac{d\Phi_E}{dt}

Where,

B= Magnetic Field

l = length

\mu_0 = Vacuum permeability

\epsilon_0 = Vacuum permittivity

Since the change in length (dl) by which the magnetic field moves is equivalent to the perimeter of the circumference and that the electric flow is the rate of change of the electric field by the area, we have to

B(2\pi r) = \mu_0 \epsilon_0 \frac{d(EA)}{dt}

Recall that the speed of light is equivalent to

c^2 = \frac{1}{\mu_0 \epsilon_0}

Then replacing,

B(2\pi r) = \frac{1}{C^2} (\pi r^2) \frac{d(E)}{dt}

B = \frac{r}{2C^2} \frac{dE}{dt}

Our values are given as

dE = 2150N/C

dt = 5s

C = 3*10^8m/s

D = 0.440m \rightarrow r = 0.220m

Replacing we have,

B = \frac{r}{2C^2} \frac{dE}{dt}

B = \frac{0.220}{2(3*10^8)^2} \frac{2150}{5}

B =5.25*10^{-16}T

Therefore the magnetic field around this circular area is B =5.25*10^{-16}T

3 0
2 years ago
Other questions:
  • A pitcher accelerates a softball with a force of 12N at 6m/s^2. What is the mass of the softball?
    10·2 answers
  • An object is placed 45 cm in front of a crystal ball. The crystal ball has a radius of 14 cm, and is made from a glass with an i
    8·1 answer
  • Look at the picture of a person about to get the soccer ball. Then drag and drop the pins to correctly complete newtons second l
    14·1 answer
  • Which statement describes the direction of spontaneous heat flow
    9·2 answers
  • What is the kinetic energy of a 400kg house that is racing around a track at 17 meters per second?
    14·1 answer
  • Why would you not be able to hear a sound in space?
    5·1 answer
  • Astronauts appear weightless while working in the International Space Station because
    15·1 answer
  • Which best describes a difference between electric current and static electricity?
    6·1 answer
  • A 9V battery is directly connected to each of 3 LED bulbs. Select the statement that accurately describes this circuit.
    5·1 answer
  • What is meant by a quantity ? Mention any three system of unit that you know to measure a
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!