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
vfiekz [6]
3 years ago
5

How is power defined

Physics
2 answers:
Sliva [168]3 years ago
6 0
Power is the work done per second..
p=w/t
Rasek [7]3 years ago
3 0
Power is defined as the amount of work done per time taken or u can say that power is the energy over time taken.
basically p=energy /time taken
You might be interested in
Scientific work is currently underway to determine whether weak oscillating magnetic fields can affect human health. For example
iragen [17]

Given Information:

Magnetic field = B = 1×10⁻³ T

Frequency = f = 72.5 Hz

Diameter of cell = d = 7.60 µm = 7.60×10⁻⁶ m

Required Information:

Maximum Emf = ?

Answer:

Maximum Emf = 20.66×10⁻¹² volts

Explanation:

The maximum emf generated around the perimeter of a cell in a field is given by

Emf = BAωcos(ωt)

Where A is the area, B is the magnetic field and ω is frequency in rad/sec

For maximum emf cos(ωt) = 1

Emf = BAω

Area is given by

A = πr²

A = π(d/2)²

A = π(7.60×10⁻⁶/2)²

A = 45.36×10⁻¹² m²

We know that,

ω = 2πf

ω = 2π(72.5)

ω = 455.53 rad/sec

Finally, the emf is,

Emf = BAω

Emf = 1×10⁻³*45.36×10⁻¹²*455.53

Emf = 20.66×10⁻¹² volts

Therefore, the maximum emf generated around the perimeter of the cell is 20.66×10⁻¹² volts

8 0
3 years ago
a bus is moving at 22m/s [E] for 12s. Then the bus driver slows down at 1.2m/s2 [W] until the bus stops. Determine the total dis
KatRina [158]
The total displacement is equal to the total distance. For the east or E direction, the distance is determined using the equation:

d = vt = (22 m/s)(12 s) = 264 m

For the west or W direction, we use the equations:
a = (v - v₀)/t
d = v₀t + 0.5at²

Because the object slows down, the acceleration is negative. So,
-1.2 m/s² = (0 m/s - 22 m/s)/t
t = 18.33 seconds
d = (22 m/s)(18.33 s) + 0.5(-1.2 m/s²)(18.33 s)²
d = 201.67 m

Thus,
Total Displacement = 264 m +  201.67 m = 465.67 or  approximately 4.7×10² m.
7 0
3 years ago
Can somone pls help me??!! i’m very stuck
Alchen [17]

Answer:

its the third one

Explanation:

3 0
3 years ago
A race car accelerates from 0 m/s ro 30 m/s with a displacement of 45 what is it acceleration
Minchanka [31]
Hdghehwhevevwgwhhwvsvsvsiosjwbwbwhshbshs
6 0
3 years ago
If f = 136 lb , determine the resultant couple moment.
olga_2 [115]
136lb?? I'm so confused rn!! I'm super sorry!!
8 0
3 years ago
Other questions:
  • Which of the following is an elastic collision?
    14·2 answers
  • In 1949, dr. tony allison observed a high frequency of kenyans carrying the sickle cell allele in coastal areas and near lake vi
    15·1 answer
  • Two runners start simultaneously from the same point on a circular 200-m track and run in the same direction. One runs at a cons
    14·1 answer
  • A frog leaps vertically into the air and encounters no appreciable air resistance.
    7·1 answer
  • Help!
    12·1 answer
  • What is the type of friction force if the object appears just about to start motion? Why?
    12·1 answer
  • HELP I WILL GIVE BRAINLYEST!!
    12·1 answer
  • A truck accelerates on a highway from rest to 216 m/s in 10s. What is the magnitude of acceleration?
    7·1 answer
  • HELPPP<br><br><br> chchcuhckf hfjf
    7·1 answer
  • Which class of hazards is characterized by thermal and mechanical hazards in the form of blast pressure waves, shrapnel and frag
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!