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
insens350 [35]
3 years ago
5

A race car accelerates from 0 m/s to 20.0 m/s with a displacement of 35.0 m. What is the vehicle's acceleration?

Physics
1 answer:
shutvik [7]3 years ago
4 0

Explanation:

<u>Using Equations of Motion</u> :

{v}^{2}  =  {u}^{2}  + 2as

a =   \frac{{v}^{2}  -  {u}^{2}}{2s} =  \frac{400 - 0}{70}  = 5.71msec^{ - 2}

You might be interested in
Which nucleus completes the following equation?
siniylev [52]
A is the answer I really don’t know the answer to that but if u can u can help me on my work
7 0
3 years ago
Read 2 more answers
Characteristics we use to tell the differences between kinds of matter pare called _ properties
lorasvet [3.4K]

The answer to the blank is physical.

6 0
3 years ago
Find the current that flows in a silicon bar of 10-μm length having a 5-μm × 4-μm cross-section and having free-electron and hol
klasskru [66]

The current flowing in silicon bar is 2.02 \times 10^-12 A.

<u>Explanation:</u>

Length of silicon bar, l = 10 μm = 0.001 cm

Free electron density, Ne = 104 cm^3

Hole density, Nh = 1016 cm^3

μn = 1200 cm^2 / V s

μр = 500 cm^2 / V s

The total current flowing in the bar is the sum of the drift current due to the hole and the electrons.

J = Je + Jh

J = n qE μn + p qE μp

where, n and p are electron and hole densities.

J = Eq (n μn + p μp)

we know that E = V / l

So, J = (V / l) q (n μn + p μp)

     J = (1.6 \times 10^-19) / 0.001 (104 \times 1200 + 1016 \times 500)

     J = 1012480 \times 10^-16 A / m^2.

or

J = 1.01 \times 10^-9 A / m^2

Current, I = JA

A is the area of bar, A = 20 μm = 0.002 cm

I = 1.01 \times 10^-9 \times 0.002 = 2.02 \times 10^-12

So, the current flowing in silicon bar is 2.02 \times 10^-12 A.  

6 0
3 years ago
Please help on this one?
dezoksy [38]

the answer is heat engine

3 0
3 years ago
PLEASE HELP! I don't get it at all! Speed is one thing; distance is another. Where is the arrow you shoot up at 50m/s when it ru
LuckyWell [14K]
I got you b, V(final)^2=V(initial+2acceleration*displacement
So this turns to (0m/s)^2=(50m/s)^2+2(9.8)(d) so just flip it all around to isolate d so you get
-(50m/s)^2/2(9.8) = d so you get roughly 12.7555 meters up
4 0
3 years ago
Read 2 more answers
Other questions:
  • Which statement describes a step-down transformer?
    7·2 answers
  • Mechanical energy is a term that can be used to describe
    10·2 answers
  • Six moles of an ideal gas are in a cylinder fitted at one end with a movable piston. The initial temperature of the gas is 28.0
    14·1 answer
  • A phone cord is 2.89 m long. The cord has a mass of 0.258 kg. A transverse wave pulse is produced by plucking one end of the tau
    9·1 answer
  • What type of system uses a liquid to transmit a force
    13·1 answer
  • Who are people that you can go to for help name three?
    9·2 answers
  • THE RIGHT ANSWER WILL RECEIVE A BRAINLESS AND POINTS AND THANKS!!!
    9·1 answer
  • You walk from your bedroom, 25m to the mailbox, and then walk 25m back to your bedroom. What is your total distance? What is you
    8·1 answer
  • What is percentage....​
    5·2 answers
  • Name an object that contains all 7 energies, and where those energies are shown.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!