Which refers to the ratio of output work to input work of a machine expressed as a percent?

total work
wattage
efficiency
power

Answers

Answer 1

Answer: C.) Efficiency

Explanation: Edge 2020 good luck ^__^


Related Questions

What made "Lunar Orbit Rendezvous" such an attractive method to get to the Moon that it was selected by NASA in July, 1962

Answers

Answer:

I don't know the answer

what is the motion of a car​

Answers

Answer: Assuming you are driving a car on the road, consider the motion of the car. As the wheels of the car spin backwards, they push the road backwards. In consequence, the road must push the wheels forward according to the third law of motion. It is this reaction force acting on the wheels causes the car to move forward.

Explanation: hope this helps!

A skier rides horizontally off of a 200 meter high cliff. If he lands 25 meters away from the base of the cliff, how fast was he skiing as he went off the edge?

A. 0.91 m/s
B. 2.91 m/s
C. 3.91 m/s
D. 25.91 m/s

Answers

Answer:

the answers, the correct one is C,   v₀ₓ = vₓ = 3.91 m / s

Explanation:

This is a projectile launching exercise, in this case they indicate that when leaving the cliff it goes horizontally, therefore the initial vertical speed is zero, let's find the time to reach the base

        y = y₀ + [tex]v_{oy}[/tex] t - ½ g t²

at the base the height is zero (y = 0 m)

        0 = y₀ + 0 - ½ g t²

         t = √ (2y₀ / g)

         

we calculate

        t = √ (2 200 / 9.8)

        t = 6.389 s

with this time we calculate the horizontal speed

        v₀ₓ = x / t

        v₀ₓx = 25 / 6,389

        v₀ₓ = vₓ = 3.91 m / s

When checking the answers, the correct one is C

Can two spheres of different diameters and different
masses have the same moment of inertia?

Answers

Answer:

NO

Explanation:

I=mr^2 this means moment inertia depends upon mass and square of radius or distance.

Which statement correctly describes the charge of the nucleus and the charge of the electron cloud of an atom?

Answers

Answer:

This question is incomplete

Explanation:

This question is incomplete because of the absence of options. However, the charge of a nucleus was discovered by Ernest Rutherford. The nucleus is located in the centre of an atom and it contains protons and neutrons. The protons are positively charged while the neutrons have no charge, thus the charge of the nucleus is positive because the neutrality of the neutron does not affect the charge of the proton.

The charge of an electron was first measured by Robert Millikan. Electrons are negatively charged subatomic particles that balance out the positive charge of the protons.

Dorji weight 1500n.if the total surface area of soles of his feet is 0.5 m2 what is the pressure exerted by his body on the ground​

Answers

Answer:

P = 3000 Pa

Explanation:

Weight of Dorji, W = F = mg = 1500 N

The total surface area of soles of his feet is 0.5 m²

We need to find the pressure exerted by his body on the ground​. The pressure is equal to the force acting per unit area. So,

[tex]P=\dfrac{1500\ N}{0.5\ m^2}\\\\=3000\ Pa[/tex]

So, the pressure exerted by his body on the ground​ is 3000 Pa.

if the net force of 15 N is exerted on an encyclopedia to cause it to accelerate at a rate of 5 m/s2. what is the mass of the encyclopedia

Answers

Answer:

3 kg

Explanation:

F = ma

(15) = m(5)

m = 3 kg

(NEED HELP ASAP)
In a lab investigation one group of students (group a) measures the speed of a 0.1 toy car to be 2.5 m/s at the bottom of a ramp another group of students (group b) measures the speed of the car to be 3 m/s at the bottom of the ramp the cars starting position at the top of the ramp is 1 m high.

a. what is the potential energy of the car at the beginning of the experiment before it's speed is measured?

b. Calculate the kinetic energy of the car for group a.

C. Calculate the kinetic energy for the car for group b.

Answers

Answer:

a = 0.98J

Explanation:

PE = mgh

PE = 0.1 x 9.8 x 1

PE = 0.98J

(a) The potential energy of the car at the beginning of the experiment is 9.8(m) J.

(b) The kinetic energy of the car for group a is 3.125(m) J.

(c) The kinetic energy of the car for group b is 4.5(m) J.

Potential energy of the car at the beginning of the experiment

The potential energy of the car is calculated as follows;

P.E = mgh

where;

m is mass of the carg is accleration due to gravityh is height of the car

P.E = m x 9.8 x 1

P.E = 9.8(m) J

Kinetic energy of the car for group a

K.E = ¹/₂mv²

K.E = ¹/₂ x m x (2.5)²

K.E = 3.125(m) J

Kinetic energy of the car for group b

K.E = ¹/₂mv²

K.E = ¹/₂ x m x (3)²

K.E = 4.5(m) J

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The total mechanical energy of a system is 950 J and the gravitational potential energy is 350 J. What is the kinetic energy?​

Answers

Answer:

The kinetic energy is 600 J

Explanation:

Mechanical Energy

The principle of the conservation of mechanical energy states that the total mechanical energy in a system remains constant as long as the only forces acting are conservative forces.

The mechanical energy is defined as the sum of the potential plus kinetic energies:

E = U + K

Where E is the total mechanical energy, U is the gravitational potential energy and K is the kinetic energy.

Solving for K:

K = E - U

The system described has a total mechanical energy of E=950 J and gravitational potential energy of U=350 J, thus:

K = 950 J - 350 J

K = 600 J

The kinetic energy is 600 J

Explain the difference between mass and weight and
how they are measured.

Answers

Answer:

Mass is a measure of how much force it will take to change that path. Mass depends on how much matter – atoms and so on – there is in an object; more mass means more inertia, as there is more to get moving. ... Weight, on the other hand, is a measure of the amount of downwards force that gravity exerts on an object

Which phrase best describes the dorsal nerve cord?

A. A group of interconnected neurons that enables response to stimuli
B. A group of similar nerve cell bodies grouped together
C. A stiff, nonconducting rod that develops down the back of all chordate embryos
D. A thick grouping of nerves that runs down the back of the embryo

Answers

Answer:

D

Explanation:

I t0ook the test and chose B and it was wrong and the answer was D.

Answer:

A thick grouping of nerves that runs down the back of the embryo

Explanation:

A cow standing atop a building in Times Square recalled a funny joke and began to laugh. The uncontrollable laughter caused the cow to fall over the side of the building. He fell for a time period of 3.5 s and landed in a bed of bushes. How fast was the cow moo-ving when he reached the bushes?

Which equation should be used to solve the problem?

Answers

Answer:

Vf = 34.3 m/s

1st equation of motion was used to solve.

Explanation:

In order to find the final speed of the cow, when it hits the bushes, we can use first equation of motion:

Vf = Vi + gt

where,

Vf = Final Velocity of Cow = ?

Vi = Initial Velocity of Cow = 0 m/s

g = acceleration due to gravity = 9.8 m/s²

t = time taken = 3.5 s

Therefore,

Vf = 0 m/s + (9.8 m/s²)(3.5 s)

Vf = 34.3 m/s

1st equation of motion was used to solve.

which two actions would strengthen an electromagnet?

A. Add and ammeter into the circuit.
B. Decrease the size of the permanent magnet in the circuit.
C. increase the number of wraps of wire around the core.
D. Replace the magnetic core with aluminum nails.
E. Connect a second battery in the circuit.

please help!!!!, ONLY ANSWER IF YOU KNOW IT

Answers

Answer:

C. increase the number of wraps of wire around the core.

E. Connect a second battery in the circuit.

Explanation:

got the question current on a p e x

increase the number of wraps of wire around the core and Connect a second battery in the circuit are the two actions would strengthen an electromagnet.

what are the types of wiring ?

The  distribution electrical power  through wires in a perfect manner inside a building or a room with better load control is known as electrical wiring.

Different types of wiring such as Tee system or Joint box system where the connection of appliances is done with this wiring, which does not  consume too much cable size.

Loop-in system means the system is used in lamps and other appliances are parallelly connected so that each appliance is controlled individually.

Cleat Wiring consists of ordinary VIR or PVC insulated wires is compounded on walls and ceilings by means of porcelain cleats, wood, or plastic, temporary system and is not suitable for domestic usage. For example, used in an under-construction building.

For more details wire, visit

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If you walk 6mph how far would you get in 10 seconds?

Answers

Answer:

0.017

Explanation:

6÷3600×10=

6÷360=0.00166666666

=0.017(rounded)

Answer:

The answer is 1 mile in 10 minutes

OC -5.9 m/s
2. A driver of a car traveling at 15.0 m/s applies the brakes, causing a
uniform acceleration of -2.0 m/s". How long does it take the car to
accelerate to a final speed of 10.0 m/s?​

Answers

Answer:

2.5 s

Explanation:

The formula for acceleration is ;

a= v₂-v₁ / t

where ;

a= acceleration = -2 m/s²

v₂= final velocity = 10 m/s

v₁ = initial velocity = 15 m/s

t= time taken for the car to accelerate = ?

Applying the values in the formula as;

a= v₂-v₁ / t

-2 = 10 - 15 / t

-2t = -5

t= -5/ -2

t= 5/2 = 2.5 s

State one way to decrease the moment of a given force about a given axis of rotation.​

Answers

Answer:

The moment of a given force about a given axis of rotation can be decreased by decreasing the perpendicular distance of force from the axis of rotation.

Answer:

hope it helps...

Explanation:

The moment of a given force about a given axis of rotation can be decreased by decreasing the perpendicular distance of force from the axis of rotation.

Snails crawl very slowly. If a garden snail crawls at 0.013 m/s north, how far will it travel in 60 seconds?

Answers

Answer:

.78 m/s north

Explanation:

Pls give brainliest if I correct

Uniform Circular Motion: You need to design a wheel for testing purposes such that its rim will have an acceleration of 1.5 g when the rim is moving at 37 m/s while spinning. What should be the diameter of this wheel?

Answers

Answer:

We want to have an acceleration of:

A = 1.5*g = 1.5*9.8m/s^2  = 14.7 m/s^2

When the rim is moving at 37m/s while spinning.

Now, in circular motion we have two accelerations.

Tangential acceleration, that is the one related to the change of speed, as we have a speed of 37m/s, we can assume that is constant, then the tangential acceleration is zero.

Centripetal acceleration, is the one related to the change in direction, is perpendicular to the velocity vector and is the one that allows the circular motion.

I suppose that in this problem we want to have a  centripetal acceleration of 14.7m/s^2

The equation for the centripetal acceleration is:

Ac = v^2/r

Where v = velocity and r = radius.

then we must solve:

14.7m/s^2 = (37m/s)^2/r

r = (37m/s)^2/14.7m/s^2 = 93.13 m

18) Why do you think divergent plate boundaries and transform fault boundaries only occur at places where the crust is the same on both plates? ​

Answers

Answer:

A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth's mantle to the surface, solidifying to create new oceanic crust. When two plates come together, it is known as a convergent boundary.

Explanation:

What are the Laws of conservation of atoms?​

Answers

Answer:

Both the initial and final substances are composed of atoms because all matter is composed of atoms. According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and kind of atoms after the chemical change as were present before the chemical change.

Explanation:

Answer:

The law of conservation of atoms is simple but it has a great affect. An atom cannot be destroyed by such a force. Matter/atoms can't be created by any means. An atom exits only by nature and not by force.

Hope this helped! Please mark brainliest! Have a great day!

May someone please help?
Air is cooled and
becomes
[denser/less dense).
Less dense air
[rises/sinks).
Denser air
(rises/sinks).
The process repeats, producing a
Air is heated and
becomes
[denser/less dense]
within the gas

Answers

Air is cooled and

becomes denser.

Denser air sinks.

The process repeats, producing a (i wasn't sure about this one)

Air is heated and becomes less dense.

Less dense air rises.

hope this helps!

how can we calculate acceleration in motion which is not uniform or uniformly accelerated​ please help tell me another formula to calculate acceleration

Answers

Answer:

These are some of the ones I found or know of.

Explanation:

F=ma

A= v-u/t

A= v^2/r

Calculate the acceleration of gravity that the moon has, if an astronaut has a mass of 87 kg and the weight force he experiences on the moon is 141 N

Answers

Answer:

the acceleration of gravity is 1.62

Explanation:

w=mg

141=87g

141/87=87g/87

1.62=g

PLSSSS HELPPP What effects do mutations have? Check all that apply.

A) could change protein shape
B)never change protein shape
C)might be neutral
D)always change the way a trait is observed
E)might be harmful
F)might be beneficial

Answers

Answer:

E, F, A, C

Explanation:

They cannot change the way a trait is observed

Mutations could change protein shape(A), could cause genetic disorders and harm you(E), could actually be beneficial and cause adaptations to your environment(F), or they could be neutral in which no changes are observantly notable(C).

Hope this helps

the photos below show four pairs of objects. which pair of objects is experiencing the greatest gravitational force.A. the person and dog B. The person and the ball C. the person and earth D. the person and the building

Answers

Answer:

C.

Explanation:

the earth has a high greavitational pull

Answer: C the person and earth

Explanation: I just answered it on a p e x

Balanced Forces acting on an object will not change the object's motion. Unbalanced Forces acting on an object will change the change the object's motion.

Answers

Answer:

TRUE

Explanation:

The answer is true.

Balance forces acting on a body will not change the motion of the body because the body experiences no net resultant force in one direction. When any body experiences equal forces with opposite directions, the net force or the resultant force experience by the body is zero.

In case of an unbalanced forces, there is a net force acting in one direction and so it causes the body to change in its state of motion in the direction of the net force.

A complex arrangement of pulleys forms what is called the block in a block and tackle. The rope used to lift the pulleys and the load is the tackle. A block and tackle is used to lift a truck engine, which has a weight and output force of nearly 8000 N. The input force required to lift this weight using the block and tackle is 400N. What is the mechanical advantage of the block and tackle?

Answers

Answer:

Mechanical advantage = 20

Explanation:

Given:

Output force = 8,000 N

Input force = 400 N

Find:

Mechanical advantage

Computation:

Mechanical advantage = Output force / Input force

Mechanical advantage = 8,000 / 400

Mechanical advantage = 20

By using electroscope, if the body is negatively charged then due to electrostatic induction, then on the leaves there will be appear:
(a) both positive and negative charges
(b) negative charge
(c) positive charge
(d) no charge

Answers

(b) negative charge

This is the answer

it should be

B)Negative charge

Hope this one helped

In a container of negligible mass, 0.0400 kg of steam at 100∘C100 ∘ C and atmospheric pressure is added to 0.200 kg of water at 50.0∘C50.0 ∘ C.
(a) If no heat is lost to the surroundings, what is the final temperature of the system?
(b) At the final temperature, how many kilograms are there of steam and how many of liquid water?

Answers

A - 100 C°
B - 0.0214 kg and 0.219 kg

Hope this helped out! Have a nice day :)

If no heat is lost to the surroundings, the final temperature of the system is 100 C°,  At the final temperature, 0.0214 kg and 0.219 kg kilograms are there of steam and how many of liquid water

What is heat ?

heat can be defined as the form of energy that is spontaneously transferred from one object to another object as the differences in temperatures is otherwise called as heat transfer.

The Heat transfer occurs  upto the  equilibrium point of an object has been reached.

Internal Energy is the total amount of energy of all the molecules of a body is the internal energy within the object.

Specific Heat or heat capacity, is   the amount of energy required to produce a unit change in its temperature.

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Ahmad is riding his bicycle. He finds that he can accelerate from rest at 0.44 m/s^2 for 5 s to reach a speed of 2.2 m/s. The total mass of Christian and his bicycle is 54 kg. Later, he straps some cargo onto the back of his bicycle. The mass of the cargo is 12 kg.• Calculate the force that Christian can exert on his bicycle before picking up the cargo and exerts the same force on his bicycle.

Answers

Answer:

1) The force Christian can exert on his bicycle before picking up the the cargo is 529.74 N

2) The force Christian can exert on his bicycle after picking up the the cargo is 647.46 N

Therefore, Christian has to exert more force on his bike after picking up the cargo

Explanation:

The given parameters are;

The mass of Christian and his bicycle = 54 kg

The mass of the cargo = 12 kg

1) The force Christian can exert on his bicycle before picking up the the cargo = Mass of Christian and his bicycle × Acceleration due to gravity

∴ The force Christian can exert on his bicycle before picking up the the cargo = 54 kg × 9.81 m/s² = 529.74 N

2) The force Christian can exert on his bicycle after picking up the the cargo = (54 + 12) kg × 9.81 m/s² = 647.46 N

Therefore, Christian has to exert more force on his bike after picking up the cargo.

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can someone describe what's a niche of a giraffe is Please Help Quick ASAP Hurry This is Pre-Algebra 1 i need the answer now please ASAP Which Word Best describes the numbers 10 and -10?A.OppositesB.CoordinateC.Absolute ValueD.Expression Which of the following statements is true regarding electromagnetism?All wires are electromagnetic.Only wires carrying current are electromagnetic.Only iron wires are electromagnetic.Only copper wires are electromagnetic. please someone help asap i will give brainliest Unscramble thisOCSLHO USCSKAm i right jatiyam of kaliki buddhi cheppadam Can someone help me with this question pls (8th grade science) What is 6^4 x 6 1/4???? How did the Cherokee initially respond to the Indian Removal Act?a-They challenged the legislation in the Supreme Court.b-They decided to conduct raids on forts and government properties to show their displeasure.c-They met with members of the Creeks, Choctaws, Chickasaws, and Seminoles to plan the move.d-They planned westward caravans that increased their chances of survival. Which career combines DNA technology and forensics? pharmaceuticals paternity testing environmental studies genetics If the net present value of a project is positive (non-zero), then the project's:________.a) PI will be less than 1. b) internal rate of return will exceed its required rate of return. c) costs exceed its benefits. d) discounted payback period will exceed the life of the project. e) payback period must equal the life of the project. PLEASE HELP OUT !!Which options describe patterns found in the fossil record? (Select all that apply.)Earths species have remained constant throughout time.Links exist connecting the lineage of different species.Most of the species that have ever existed on Earth are still alive today.Mass extinction events occur periodically throughout time. What is a component of amino acid not contained in starchA. Amino acids contain hydrogen.B. Amino acids contain oxygen.C. Amino acids contain carbon.D. Amino acids contain nitrogen. The distance on a map between lake view and bay cove is 4.5 inches. The map key says 0.5 inches on the map is equivalent to 1 mile. what is the actual distance between Lake view an bay cove? State one way to decrease the moment of a given force about a given axis of rotation. Which are Career and Technical Student Organizations? (Check all that apply.)Business Professionals of AmericaAmerican Association of School AdministratorsAmerican Chemical SocietyUDECAFuture Business Leaders of AmericaFFASkills USAFCCLAWill give brainliest! 50 points!!! help im being timed what is the area of the rectangle?! A gas at -20c occupies volume 140 ml calculate temperature at which the volume of the gas becomes 65 ml pressure constant In a titration, you start with 0.05 M sodium hydroxide (NaOH) and slowly add it to 40 mL of HC1 with an unknown concentration. What is the original concentration of the HC1 if you add a total of 15.4 mL of sodium hydroxide to the HC1 to achieve pH =7? Do you have a sentence that contains the title and the author "TheTragedy of Julius Caesar by William Shakespeare"?If not, what is missing?