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
serg [7]
3 years ago
12

You input 75 J of work with a wedge. If the wedge does 65 J of useful work, what if the efficiency of the wedge ?

Physics
1 answer:
zavuch27 [327]3 years ago
5 0

Answer:

Efficiency of wedge is the ratio of "work done by the machine to the work supplied to the machine".

           Efficiency (η) = Work done by machine ÷ Work supplied

                                  = 65 ÷ 75

                                 = 0.86%

<em>Efficiency of wedge is 86%</em>

You might be interested in
Consider a spherical Gaussian surface of radius R centered at the origin. A charge Q is placed. inside the sphere. Where should
Elanso [62]
I think you forgot to give the options along with the question. I am answering the question based on my knowledge and research. "<span>The charge can be located anywhere, since flux does not depend on the position of the charge as long as it is inside the sphere" gives the answer to the question. I hope that this answer has come to your help.</span>
5 0
3 years ago
PLEASE HELP ME I AM STUCK, FRUSTRATED, AND DONT EVEN KNOW HOW TO START THIS PROBLEM AHHSRFHRERHYT
Naily [24]

It takes the car 14 seconds to stop

Explanation:

A car is traveling at a constant velocity of 19 m/s when the driver puts

on the brakes to accelerate it at -1.4 m/s² until stopped

1. The initial velocity is 19 m/s

2. The acceleration is -1.4 m/s²

3. The final velocity is zero

We need to find how long it takes the car to stop

We can find the time by using the rule

→ v = u + a t

where v is the final velocity, u is the initial velocity, a is the

acceleration and t is the time

→ v = 0 m/s , u = 19 m/s , a = -1.4 m/s²

Substitute these values in the rule

→ 0 = 19 + (-1.4) t

→ 0 = 19 - 1.4 t

Add 1.4 t to both sides

→ 1.4 t = 19

Divide both sides by 1.4

→ t = 13.57 ≅ 14 seconds

It takes the car 14 seconds to stop

Learn more:

You can learn more about velocity in brainly.com/question/10772739

#LearnwithBrainly

4 0
3 years ago
El extremo de una cuerda se mueve de tal manera que las partículas de la cuerda emplean 0.25 segundos para producir una vibració
insens350 [35]

Responder:

T = 0.25 segundos

f = 4 Hz

Explicación:

Paso uno:

datos dados

se nos dice que las partículas tardan 0,25 segundos en completar una vibración

por lo tanto, el período es de 0,25 segundos

¿Qué es un período de vibración?

Un período T es el tiempo necesario para que un ciclo completo de vibración pase por un punto determinado.

la expresión para el período se da a continuación.

T = 1 / f

¿Cuál es la frecuencia de vibración?

Básicamente, se refiere a la frecuencia con la que ocurren las vibraciones.

la frecuencia es una tasa, se expresa como la inversa del período

f = 1 / T

t = 1 / 0.25

f = 4 Hz

6 0
3 years ago
A scuba diver wears weights as well as a buoyancy compensator to establish neutral buoyancy while diving. The buoyancy compensat
katrin [286]

Answer:

With more air is more buoyancy. When deflated or released the scuba diver is less buoyant.

Explanation:

The compensator is a Buoyancy control device that has an inflatable air bladder.When we have more air out into the inflatable bladder, then one is more buoyant. If the air is released from the bladder, then one is less buoyant. We add air through an air inflation valve. Air is also then released using air-deflation valves.

Buoyancy can be defined as an upward force which is exerted on an object that is fully or partially immersed in water

when one is less buoyant than water, it means that the upward pressure is more than the downward pressure of that person and his equipment. Then he will float. In a case of negative buoyancy, we have downward pressure of this person and his equipment to be more than the upward pressure of the water. Then sinking will happen.

4 0
3 years ago
A ball is thrown horizontally from a height of 19 m and hits the ground with a speed that is five times its initial speed. What
Helen [10]

Answer:

The initial speed of the ball is 3.93 m/s.

Explanation:

It is given that,

A ball is thrown horizontally from a height of 19 m, h = 19 m

Let u is the initial speed of the ball so, its final velocity, v = 5u

Using third equation of motion as :

v^2-u^2=2gh

(5u)^2-u^2=2\times 9.8\times 19

24u^2=372.4

u = 3.93 m/s

So, the initial speed of the ball is 3.93 m/s. Hence, this is the required solution.

8 0
3 years ago
Other questions:
  • Why echoes are undesirable in a big hall
    11·1 answer
  • Velocity and acceleration are both vectors; they have a direction. What is thedirection of the velocity and acceleration vectors
    7·1 answer
  • Accuracy and precision
    11·1 answer
  • Which statements describe the principles of the big bang theory? Check all that apply. The universe is continuing to expand. A m
    14·2 answers
  • A person weighing 500 N climbs 3 m. How much power is needed to make the climb in 5 sec?
    10·2 answers
  • A physics student with too much free time drops a watermelon from a roof of a building, hears the sound of the watermelon going
    12·1 answer
  • What is the momentum of a 2300 truck miving at a velocity of 35 meters/second?
    8·1 answer
  • What is the weight of a 15kg dog on earth?
    8·1 answer
  • An electrolyte is . . . . .
    8·1 answer
  • If little herbert does something uncon<br> sciously he will probably
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!