Which of these is true of all simple machines?
A.Input force is always less than output force.
B.Work input is always greater than work output.
C.Work output is always greater than work input.
D.Output force is always less than input force.

Answers

Answer 1
The answer to the question is b

Related Questions

In what way is consciousness a construct?

Answers

Answer:

Consciousness is a psychological construct because it is believed to exist, but we are unable to physically measure it, so descriptions are 'constructed' to explain it. ... The more aware we are of our thoughts, feelings, perceptions and surroundings, the higher the level of consciousness.

power of a crane is 25000 watt calculate the time required by it to lift a load of 6000 kg up tp the height of 20 m​

Answers

Solution:

We have,

Power [P] = 25000 Watt

Mass [m] = 6000 kg

Height [h] = 20 metres

Time [t] = ?

Now,

P = W/t = F x d/t = mxgx h/t

Or, 25000 = 6000 x 10 x 20/25000 [.......g = 10

m/s^2]

Or, t = 6000 x 10 x 20/25000

Or, t = 1200/25

Therefore, t = 48 second

Hence, the required time for the crane to lift the load is 48 seconds.

Who's going to win game 6 tonight? Clippers or Mavericks?
I just want to know your opinion :)

Answers

Mavericks!!!!!!!!!!!!!

What are the major components of a truss bridge?

Answers

Answer:

In a truss bridge, two long - usually straight members known as chords - form the top and bottom; they are connected by a web of vertical posts and diagonals. The bridge is supported at the ends by abutments and sometimes in the middle by piers.

Explanation:

Hope it helps mark as brainliest pls

:)

39. A dog runs on a waxed floor at an initial speed of 2 m/s. It slides to a stop with an
acceleration of -0.43 m/s2. How long does it take for the dog to stop?

Answers

Answer:

Explanation:

Use the one-dimensional equation

[tex]v_f=v_0+at[/tex] where vf is the final velocity of the dog, v0 is the initial velocity of the dog, a is the acceleration of the dog, and t is the time it takesto reach that final velocity. For us:

0 = 2 + -.43t and

-2 = -.43t so

t = 4.7 seconds

Write your answers to these questions. • Does the cardboard fall off? • Does the water pour out? • Something is pushing against the cardboard to hold the water in. What do you think it is?​

Answers

Answer:

Have you ever tried turning a glass of water upside down without spilling it? It seems impossible! Both kids and adults will be amazed by this experiment that appears to defy gravity.

With just a few simple household items, you can try this simple and fun science experiment where kids can get see the effects of air pressure in action. Printable instructions, a demonstration video, and an easy to understand explanation of how it works are included below.

Helpful Tip: Be sure to try this experiment over a sink or large container lest you accidentally make a BIG wet mess!

How do sports play a role in American Culture? Is this different from how sports play a role in other cultures?

PLEASE ANSWER QUICKLY!!!

Answers

Answer: American sports culture has a much greater appreciation of and emphasis towards collegiate and high school sports. This may be the strongest difference between American sports culture and every other countries' sports culture.

In space, are fires possible without oxygen? If so how would it happen?

Answers

Answer:

no

Explanation:

it just doesn't work that way, try to search the fire pyramid on G. O. O. G. L. E. and you'll see why

No fires are not possible in space

An eccentric inventor attempts to levitate by first placing a large negative charge on himself and then putting a large positive charge on the ceiling of his workshop. Instead, while attempting to place a large negative charge on himself, his clothes fly off. Explain.

Answers

Answer:

shirt is little attached to the body, it can come off and fly away

Explanation:

In electrostatics, charges of different signs attract and charges of the same sign repel.

In this case, when a negative charge is placed on it, both the inventor and the shirt are charged, therefore there is a repulsive force, also there is an attraction between the positive charge of the roof attracts the negative charge, such as the shirt. of weak the two forces not greater than the resistance of the walk.

As the shirt is little attached to the body, it can come off and fly away

Blank is the time rate of change in velocity

Answers

Acceleration is the time rate of change in velocity.

Acceleration = Rate of change of velocity

rate of change of velocity so it would be acceleration

If the speed of the wave along the rope is 3.2 m/s. Calculate the frequency of the wave​

Answers

Answer:

2Hz

Explanation:

Find the diagram attached

Using the formula;

v = fλ

v is the velocity

f is the frequency

λ is the wavelength

Given the following

v = 3.2m/s

λ = 4.8/3 = 1.6m

Get the frequency

f = v/λ

f = 3.2/1.6

f = 2Hertz

Hence the frequency of the wave is 2Hz

The frequency of the wave is equal to 2.0 Hertz.

Given the following data:

Speed of wave = 3.2 m/s. Distance = 4.8 meters.

To calculate the frequency of the wave​:

How to calculate frequency.

First  of all, we would determine the wavelength of the wave in the image attached below:

Note: Wavelength is the successive distance between two (2) crests.

[tex]Wavelength = \frac{distance}{3} \\\\Wavelength = \frac{4.8}{3}[/tex]

Wavelength = 1.6 meter.

Mathematically, frequency is given by this formula:

[tex]Frequency = \frac{velocity}{wavelength} \\\\[/tex]

Substituting the given parameters into the formula, we have;

[tex]Frequency = \frac{3.2}{1.6}[/tex]

Frequency = 2.0 Hertz.

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What is the name for forces that act on an object and cancel each other out causing the object to be at rest?

Answers

Answer:

If an object is at rest, then the forces acting on both sides are equal and there is resultant force is 0.

what is the x component that of a vector that is defined 2.5m at 64 degree?
A) -2.2m
B) 1.1m
C) 2.2m
D) -1.1m

Answers

Answer:

Explanation:

This is a displacement vector since it is given in terms of a distance (meters, to be specific). The way you find the x-component is:

[tex]V_x=Vcos\theta[/tex] which means you multiply the magnitude (length) of the vector times the cos of the direction (the angle):

[tex]V_x=2.5cos(64)[/tex] to get

1.1 m, choice B.

is the Matter is made up of motionless particles.

Answers

Answer:

All matter is made up of atoms.

No they are all made up from atoms

Which term describes an area of low density in a longitudinal wave?
A. Crest
B. Compression
C. Rarefaction
D. Trough

Answers

Answer: rarefaction

Explanation: correct answer on a p e x

Rarefaction term describes an area of low density in a longitudinal wave.

What is wave ?

Wave is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.

Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform.

There are two types of the wave longitudinal wave and transverse wave. Longitudinal wave : in which, vibration of the medium (particle) is parallel to propagation of the wave. Sound wave is a longitudinal wave. Transverse wave : in which, vibration of the medium (particle) is perpendicular to propagation of the wave. Light wave is a transverse in nature wave.  

In Longitudinal wave, wave carries energy and momentum with compression and rarefaction. Compression is region of high density, in this region particles of the medium is compressed. rarefaction is region of expansion and it is low density region of longitudinal wave.

Hence option C is correct.

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For each statement in the rows, select the most suitable option (words) in the columns. One selection for each row.

Series Circuits. Parallel Circuits. Series and parallel circuit.

The total voltage across
each component is the
same as the total voltage
being supplied to the circuit .

The Current is the equal at
all parts of the circuits.

Total current is divided among all
the components in the circuits.

The voltage is divided into all the
components in the circuits.

Answers

Answer:

the answer is most likely likely to be 2

An engine has an imput of 100 j and gives out 27 j of useful kenetic energy what is the efficiency of the engine

Answers

Answer:

Based on what we have learned so far, in what ways have the experiences of Asian-Canadians stayed the same over time? Why do you think these similarities exist? Please give specific examples to support your ideas.

Explanation:

What is the capacitance of a capacitor that has 7.9 x 107 C of charge and a potential
difference of 12.0 V?

Answers

Answer:

6.58×10⁶ F

Explanation:

Applying,

Q = CV..................... Equation 1

Where Q = charge of the capacitor, C = Capacitance of the capacitor, V = Volatage

Make C the subject of the equation

C = Q/V................. Equation 2

From the question,

Given: Q = 7.9×10⁷ C, V = 12.0 V

Susbtitute these values into equation 2

C = 7.9×10⁷/12

C = 6.58×10⁶ F

38. Joey set a school record for running the 200 m race. He completed the distance in
20.6s. What was his average speed?

Answers

Answer:

9.7 miles per second

Explanation:

divide 200 by 20.6

1) Complète les phrases suivantes en remplaçant
chaque numéro par le mot convenable:
• Pour l'oeil 1, l'image est formée en avant de la
rétine, car l'oeil est trop long.
• Pour l'oeil 2, l'image est formée derrière la
rétine, car l'oeil est plus court.
2) Trouve la place de la lentille convergente, ainsi
que les 2 foyers principaux (F) et (F').

Answers

Answer:

si?

Explanation:

definition La myopie. L'oeil myope est trop long ou le cristallin trop convergent. L'image d'un objet à l'infini se forme en avant de la rétine. Le punctum remotum est ... i dont know sorry

A spring extends by 10cm when a mass of 100g is attached to it. What is the spring constant?​

Answers

Answer:

10N/m

Explanation:

Using F=kx

F=mg

k=mg/x

k=0.1*10/0.1 (kg*m/s^2)/m

10N/m

How many dots belong in the electron dot diagram of a boron (B) atom?

three
five
eight
thirteen. pls let me know I have been working on this for 9 hours

Answers

The answer is five dots.

sorry i  meant three dots not five


Jeremy is pushing his two children on a set of swings. He gives his daughter a push and she swings
Jeremy gives his son the same push, but he only swings about two feet high. What could account f
the kids got?
Jeremy's daughter has more mass, so it takes less force to get her into the air.
Jeremy's son has more mass, so it would take more force to reach the same height as his da
O
Jeremy's son has less mass, so it would take more force to reach the same height as his da
O
Jeremy's daughter has more mass, so she accelerates faster than his son.

Answers

Jeremy’s son has more mass, so it would take more forever to reach the same height as his daughter

Which is true? I. It takes positive work to bring like charges together. II. Electric field lines always point in the direction of decreasing electric potential. III. If a negative charge moves in the direction of the electric field, its potential energy decreases

Answers

Answer:

Sentence III

Explanation:

I. It takes positive work to bring like charges together.

Using Coulom law we know that like charges will feel a repulsion force that meen that if we want to put them together we are going againt the force, this means we need a negative work. So is False.

II. Electric field lines always point in the direction of decreasing electric potential.

The elctrical fiels depend on the charge of the particle. So if the particle is positive the field will point always outwart the charge, and if the particle is negative, the electric field will point to the charge. Also, we know that the potential is bigger clouser to the charge, so this sentence is folce when we have a negative charge. So is False.

III. If a negative charge moves in the direction of the electric field, its potential energy decreases

If a negative particle move in the direction of the elctric field in bout cases the potential will decrease. If we have a positive charge the electron will be atracted by the field, How ever the electric fild is pointing in the other direction, for that reason will decrease.

Round off the following numbers to three significant digits:
43.659

Answers

Answer: 43.7

Explanation: Simply round the number so that there are only three digits in the number.

We have that 43.659 rounded to three significant digits is

[tex]43.659=43.7[/tex]

From the Question we are Given

Integer=43.659

To round off to three significant digits means to represent only three digits

Therefore

43.659 in  three digits is

[tex]43.659=43.7[/tex]

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If 175 kJ of heat caused a chunk of ice at 0°C to melt to liquid water at 0°C, how many moles were in the ice? How many grams of ice? (Note: molar mass of ice/water is 18.02 g/mol)

Answers

Answer is 29.1 mol or 525 g

Explanation:

Para investigar - Posición del cuerpo en general. - Posición de la cabeza. - Posición de los brazos y manos. - Apoyo de los pies. - Como deben ser los movimientos.

Answers

Answer:

Algunos se mueven en dos direcciones y algunos se mueven en las cuatro direcciones.

Explicación:

Para investigar la posición del cuerpo en general, la posición de la cabeza, la posición de los brazos y manos y los pies tienen algunos movimientos específicos. Algunos se mueven hacia arriba y hacia abajo significa en dos direcciones mientras que el otro se mueve en todas las direcciones. Los brazos se mueven solo hacia adelante y hacia atrás, mientras que, por otro lado, los pies, la mano y la cabeza se mueven hacia la izquierda, la derecha y hacia arriba y hacia abajo.

Pls explain the nature of the image formed by the pin-hole camera

Answers

Answer:

→Inverted image ( upside down )

→Real image ( because it is formed on the screen )

→Magified image ( image size is greater than object size)

. What is the mass of an object if it is pulled by a 5 Newton force and it accelerates at a rate of 20 m/s/s?
Please help ASAP

Answers

F = ma

so, we can write it as;

= 5 = m × 20

= 5/20 = m

= 1/4 = m

= 0.25 kg = m


[tex]what \: is \: light \: {?} [/tex]

Answers

Light is a form of electromagnetic radiation with a wavelength which can be detected by the human eye. It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun. Animals can also see light. The study of light, known as optics, is an important research area in modern physics.

Answer:

Light is a form of energy which produces the sensation of sight .

hope it is helpful to you

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