If these cranes make the work being done ten times easier, what is the mechanical advantage?

A. cannot be determined
B. ten

Answer:

I don't know

Explanation:

because I'm not smart

Answer:

2,500

Explanation:

Answer:

"A pendulum swinging back and forth" is an example of harmonic motion

X = Xo cos ω t

Explains the back and forth motion of the pendulum

Answer:

Speed.

Their speeds are different; Have you ever heard the metaphor the speed of light? For this case, we must turn that into a reality. So, people refer to light speed as the fastest travelling thing in the world, and that is right, unless there is a thing faster than light that was never classified. Unlikely the case. The speed of sound through air travels a lot slower than light. Look at the diagrams below to see what I mean by that.

                                                             • • •

As shown in the diagrams, sound speed is WAY slower than light speed!

Answer:

Explanation:

Answer:

When oil is spilled in the sea it will normally break up and be dissipated or scattered into the marine environment over time. This dissipation is a result of a number of chemical and physical processes that change the compounds that make up oil when it is spilled. The processes are collectively known as weathering.

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As the slit width increases, the diffraction pattern gets narrower and vice versa.

The increase in silt width leads to the narrowing of diffraction pattern of the  light because the increase of width reduces the space for the passing of light wave.

So we can conclude that as the slit width increases, the diffraction pattern gets narrower and vice versa.

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Answer:

electrons

Explanation:

Brainliest

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Magnetism is due to the movement of charge

Both magnetic fields are caused due to attraction and repulsion of charges, where electric fields is caused by stationary charges, while magnetic fields are caused by moving charges

For a lunar eclipse to occur, the Sun, Earth, and Moon must be roughly aligned in a line. Otherwise, the Earth cannot cast a shadow on the Moon's surface and an eclipse cannot take place. When the Sun, Earth, and Moon come together in a straight line, a total lunar eclipse takes

Answer:

subatomic, element

Explanation:

Subatomic particles are protons, neutrons, and electrons. Atoms are the smallest unit of an element.

Explanation:

a) mass=3000kg

b) weight on planet x=3000 × 7.5

=22,500N

c) Weight in outer space will be equal to zero

since the gravity in outer space is negligible

If current did not flow in the circuit, it simply implies that the material is an insulator.

An insulator is a material that does not conduct electricity. A circuit is a  path  that is provided for the flow of current.

If this material was connected into a complete circuit yet current did not flow in the circuit, it simply implies that the material is an insulator.

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Answer:

hope this helps, you can ask any questions for clarification

For  a 25.0kg wooden box across a wooden floor at a constant speed of 1.0m/s, The force is mathematically given as

F=49N

Generally, the equation for the Force   is mathematically given as

F=uN

Therefore

F=25*9.8*0.20

F=49N

In conclusion, the force is

F=49N

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Answer:

Move the opposite direction ( at a lesser magnitude of velocity)

Explanation:

Old potential energy:-

New potential energy

Option B is correct

Answer:

75%(TT,Tt,tt) Hope that helps

Answer:

See below

Explanation:

A lot !

KE = 1/2 m v^2

    = 1/2 * 1.35 * ( .501 * 3 * 10^8)^2 =

    1.5248 x 10^16 j

kinetic energy do Superkid's super arm muscles give the stone is 62.6 × 10⁶ J.

Kinetic energy is the energy associated with a motion of a body. When a body is in motion having mass m then it has kinetic energy. Kinetic energy is denoted by K or T. it is expressed in joules. Kinetic energy is given by,

K = 1/2 mv²

Hence an object having zero mass or zero velocity have zero kinetic energy.

In this problem the stone is moving with velocity which is comparable with the speed of light, hence we have to find relativistic kinetic energy.

The relativistic kinetic energy is given by,

[tex]K = m_{0} c^2(\frac{1}{\sqrt{1-\frac{v^2}{c^2}} } -1)[/tex]

putting all the values in the equation

[tex]K = 1.35*3*10^8(\frac{1}{\sqrt{1-\frac{(0.5c)^2}{c^2} } }-1 )[/tex]

K = 62.6 × 10⁶ J

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The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.

A battery is a device that uses an electrochemical oxidation-reduction (redox) cycle to turn the chemical energy included in its active components directly into electric energy. An electric circuit is used in this kind of reaction to transmit electrons from one substance to another.

The actual elector-chemical unit used to produce or store electric

For this one it should be A single fuel cell generates approximately one volt of electricity. Individual fuel cells are combined to form a fuel cell stack to enhance the amount of electricity produced.

The amount of electricity a fuel cell system produces is boost by combined to form a fuel cell that is battery.

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Hi there!

Let's say that a series RL circuit is constructed, with the switch left open.

When the switch is closed, a current will start flowing in the circuit. The INCREASING current will go through the loops of the inductor, producing an INCREASING magnetic field and consequentially a magnetic flux through the inductor. (Use hand rules).

However, the inductor does NOT want to experience this increasing magnetic flux, so an emf in the OPPOSITE direction of the current will be produced to counteract the increasing flux. (The flux would also be in the opposite direction).

This is expressed with the equation:

[tex]\epsilon = -L \frac{di}{dt}[/tex]

ε = Back emf (V)
L = Inductance (H)

i = Current (A)
t = time (s)

With the negative sign, we can see that if the current of the circuit is INCREASING, the emf produced would be in the opposite direction.

Answer:

the worker is doing work because he is moving the bale of cotton

Simple harmonic motion is the motion in objects where the restoring for d is directly proportional to the body displacement.

Simple harmonic motion a type of periodic motion where the force that restores moving object to it's right position is directly proportional to the magnitude of body's displacement and this normally acts towards the object's equilibrium position.

The formulate for simple harmonic motion are

,F = −kx, where F is the force, x is the displacement, and k is a constanst. An example of a simple harmonic oscillator is the vibration of a mass attached to a vertical spring.

Simple harmonic oscillator can be represented by the equation x ( t ) = A cos ⁡ ( 2 π f t ) x(t) = A\cos(2\pi f t) x(t)=Acos(2πft)x,

where t is period.

x is displacement

A is amplitude.

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Answer:

2000

Explanation:

well it is just   20 * 100 = 2000 v

There won't be another period where many brilliant discoveries are made in such a span of time because of the high degree of advancement already.

Tgis is defined as the application of scientific knowledge for practical purposes.

We have advanced technological advancement which is why there won't be many discoveries in such time span.

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Answer:

1) Ionization takes place as the Hydrochloric acid, a strong acid, ionizes completely in water to form the hydronium and chlorine (Cl−) ions

3) Water -- non electrolyte

4) it can conduct electricity because it forms ions

I hope my answer helps you.

The acceleration, a of the bodies given is the change in velocity with time and is given as follows:

Acceleration is the rate of changeof velocity of an object with time.

For the given questions, the acceleration are as follow:

Therefore, the acceleration of a body is either positive or negative.

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The mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.

The number of moles of the helium gas is calculated as follows;

W = nRT

where;

273 K = 0⁰C and 388 K = 115⁰ C

from 0⁰C to 115⁰C = 115 - 0 = 115⁰ C

115⁰ C = 388 K

The number of moles is calculated as follows;

n = W/RT

[tex]n = \frac{80}{8.315 \times 388} \\\\n = 0.0248 \ mol[/tex].

Mass of the helium sample is calculated as follows;

m = Mn

where;

m = 4 g/mol x 0.0248 mol

m = 0.099 g

Thus, the mass of the helium gas sample after the work is done by the gas during the process is 0.099 g.

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