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
Mumz [18]
3 years ago
15

The lever which makes our work easier only by accelerating the rate of work is:

Physics
1 answer:
ladessa [460]3 years ago
8 0

Answer:

power

Explanation:

it helps to do work without power we cant do any things

You might be interested in
FREE BRAINLEST JUST COMMENT MRBEAST
Pepsi [2]

Answer:

MRBEAST-

Explanation:

6 0
3 years ago
Read 2 more answers
A coil has 400 turns and self-inductance 7.50 mH. The current in the coil varies with time according to i = 1680 mA2 cos [πt/(0.
zhannawk [14.2K]

Answer:

(a) 1.58 V

(b) 0.0126 Wb

(c) 0.0493 V

Solution:

As per the question:

No. of turns in the coil, N = 400 turns

Self Inductance of the coil, L = 7.50 mH = 7.50\times 10^{- 3}\ H

Current in the coil, i = 1680cos[\frac{\pi t}{0.0250}] A

where

i_{max} = 1680\ mA = 1.680\ A

Now,

(a)  To calculate the maximum emf:

We know that maximum emf induced in the coil is given by:

e = \frac{Ldi}{dt}

e = L\frac{d}{dt}(1680)cos[\frac{\pi t}{0.0250}]

e = - 7.50\times 10^{- 3}\times \frac{\pi}{0.0250}\times \frac{d}{dt}(1680)sin[\frac{\pi t}{0.0250}]

For maximum emf, sin\theta should be maximum, i.e., 1

Now, the magnitude of the maximum emf is given by:

|e| = 7.50\times 10^{- 3}\times 1680\times 10^{- 3}\times \frac{\pi}{0.0250} = 1.58\ V

(b) To calculate the maximum average flux,we know that:

\phi_{m, avg} = L\times i_{max} = 7.50\times 10^{- 3}\times 1.680 = 0.0126\ Wb

(c) To calculate the magnitude of the induced emf at t = 0.0180 s:

e = e_{o}sin{\pi t}{0.0250}

e = 7.50\times 10^{- 3}\times sin{\pi \times 0.0180}{0.0250} = 2.96\times 10^{- 4} =0.0493\ V

7 0
3 years ago
Name the Organs and functions of digestive system
Alexxx [7]
You forgot to add a photo.
6 0
3 years ago
A scientist discovered an elementary particle paired with another particle. It has a positive charge equal to two–thirds of the
julia-pushkina [17]
W boson has +1e or - 1e charge, Z boson has 0 charge.

Leptons have +1e, -1e or 0 charge.

Photons have 0 charge.

Only quarks have a charge of +2/3e or -1/3e of an electron charge. 

To be exact, only up-type quarks (Up, Down and Top quarks) have a +2/3e or two thirds of an electron charge.

So the correct answer is D) Quark.
6 0
3 years ago
Why is density equal to mass/volume?
Zepler [3.9K]

Answer:

This is because both the mass and the volume of the two minerals will be added, and so when they are divided to get the density the result will be between the two. Typical densities for gasses are on the order of thousandths of grams per cubic centimeter

Explanation:

4 0
3 years ago
Other questions:
  • Two boys want to balance a seesaw perfectly. One boy weighs 120 pounds and is sitting four feet from the fulcrum. The other boy
    7·1 answer
  • If your mass is 63.7 kg, and you are standing 7.5 m away from a boulder with
    7·2 answers
  • Immediately after being struck by a hammer, the nail (mass of 50 g) has a velocity of 50 m/s. The total frictional force is 62.5
    13·1 answer
  • What does it mean if a conductor is in "electrostatic equilibrium"? a) The conductor is at rest.
    5·1 answer
  • State the law of universal gravitation, and use examples to explain how changes in mass and changes in distance affect gravitati
    5·1 answer
  • A force of 6.0 N gives a 2.0 kg block an acceleration of 3.0
    10·1 answer
  • Who knows the egg drop challenge
    13·1 answer
  • A ferry approaches shore, moving north with a speed of 6.2 m/s relative to the dock. A person on the ferry walks from one side o
    10·1 answer
  • Section 1: Experimental Overview
    6·1 answer
  • What do you think is the reason scientists use an ellipse rather than a circle as
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!