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
olya-2409 [2.1K]
3 years ago
11

Please help i really need it. this is my physic exam

Physics
2 answers:
erastova [34]3 years ago
7 0
Correct answer is C.
Harlamova29_29 [7]3 years ago
3 0

Answer:

bout=14.4V , b)R2=80

am i right

You might be interested in
Lasers can be constructed that produce an extremely high intensity electromagnetic wave for a brief time—called pulsed lasers. T
MAVERICK [17]

Explanation:

It is given that,

Maximum electric field, E=10^{11}\ V/m

Time taken, t=1\ ns=10^{-9}\ s

(a) Maximum magnetic field, B=\dfrac{E}{c}

B=\dfrac{10^{11}\ V/m}{3\times 10^8\ m/s}

B = 333.33 T

(b) Intensity of beam, I=\dfrac{E^2}{2\mu_o c}

I=\dfrac{(10^{11})^2}{2\times 4\pi \times 10^{-7}\times 3\times 10^8}

I=1.32\times 10^{19}\ W/m^2

(c) Energy delivered by the pulse, E=I\times A\times t

E=1.32\times 10^{19}\times 10^{-6}\times 10^{-9}

E = 13200 J

Hence, this is the required solution.

8 0
3 years ago
Plzzzz helppp
timofeeve [1]

There is a low correlation between the independent and dependent variables.  Something we are not considering is probably causing the changes in the dependent variable.


6 0
3 years ago
At what angle North of East must the ship travel to reach its destination? Let East be 0◦ and North 90◦.
soldi70 [24.7K]
That kind of depends on where the ship is now, and where it wants to go.
We learn these kinds of things in navigation school, and I'll just bet that
it's the kind of information that's right there in the part of the question
that you didn't bother copying.
3 0
3 years ago
Thorium^+2
Bad White [126]

Answer:

chemical symbol: Th

atomic number:90

protrons :90

neutrons:142

group#:4

period#: 9

Explanation:

you take the atomic weight (232.038)and subtract the atomic number to get (90) which is your neutrons

6 0
3 years ago
A fan blade rotates with angular velocity given by ωz(t)= γ − β t2. part a calculate the angular acceleration as a function of t
Katyanochek1 [597]
Given:

w = z(t)= γ − β*t^2

Differentiating both sides with respect to t, we get:

α = z(t) = -2βt

Given: 
<span> γ = 5.35 rad/s and β = 0.810 rad/s3 
</span>
so, For t = 3 sec,

angular acceleration = -2 * 0.810 * 3 = 
<span>-4.86</span>
8 0
4 years ago
Read 2 more answers
Other questions:
  • In which scenario does radiation occur?
    7·2 answers
  • When is the tide the highest
    13·2 answers
  • Which statement is true about acceleration?<br> who is an underated physicist?
    13·1 answer
  • A small object carrying a charge of -4.00 nC is acted upon by a downward force of 19.0 nN when placed at a certain point in an e
    12·1 answer
  • If a car goes along a straight road heading east and speeds up from 45 ft/s to 60 ft/s in 5 s, calculate the acceleration.
    7·1 answer
  • II NEED HELP WITH THIS QUESTION PLS
    12·1 answer
  • A Chinook salmon can jump out of water with a speed of 7.20 m/s . How far horizontally can a Chinook salmon travel through the a
    15·1 answer
  • 3. a. (i) You are traveling on a plane trip from Washington, D.C. to Cleveland, Ohio andthe plane uses 1,260 MJ/passenger trip.
    15·1 answer
  • Pls answer the question in the picture
    6·2 answers
  • A certain sprinter has a top speed of 11.3 m/s. If the sprinter starts from rest and accelerates at a constant rate, he is able
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!