The electromagnet in a motor must rotate consistantly in just one direction to transfor. ectrical energy into mechanical energy. What causes this rotation?

​

Answer: it's c. ← 63 N and → 73 N

Explanation:

The average acceleration between t = 5.6 s and t = 8.5 s is 2.31  m/s²

Acceleration is defined as the rate change of velocity with time.

acceleration a = (Δv) / (Δt)

An object is moving with initial velocity u =5.7 m/s and its final velocity v= -1.0 m/s.

Time taken for the change in speed, t= 8.5 - 5.6 = 2.9 seconds

The acceleration is given by

a = (-1 - 5.7)/ 2.9

a = -  2.31 m/s²

|a | = 2.31 m/s²

Thus, the object's acceleration is 2.31 m/s²

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The net force needed to lift a full grocery sack uniformly is 32.115 N.

When two or more forces are acting on the system of objects, then the to attain equilibrium, net force must be zero.

Given the weight of sack W = 210N and the acceleration a = 1.5m/s².

The mass of the sack will be

m = Weight / acceleration due to gravity

m = 210 N/9.81 m/s²

m = 21.41 kg

Using Newton's second law, the net force will be

F = mass x acceleration

F= 21.41 x 1.5

F = 32.115 N

Thus, the net force is 32.115 N.

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If the man DECREASES the force of his push on the cart, the cart slows down.

The force applied to an object is determined by applying Newton's second law of motion.

F = ma

where;

a = Δv/t

F = (mΔv)/t

mΔv = Ft

Δv = Ft/m

From the equation above, when the applied force decreases, the change in velocity decreases.

Thus, if the man DECREASES the force of his push on the cart, the cart slows down.

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The magnitude of the sum of the frictional forces acting on the bike and its rider is 400N.

The friction force is the opposing force which acts on the object which is in relative motion.

The driving force is equal and opposite to the friction force acting between road and bicycle.

Friction force = 400N

The friction force between rider and bike is zero.

So the magnitude of sum of friction force = 400N +0 = 400N

Thus, the magnitude of the sum of the frictional forces acting on the bike and its rider.

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Explanation:

What is rest ?

( it does not change its position with respect to the table )

What is motion ?

[tex]...[/tex]

Question : What is Rest ?

Example ...

Question : What is Motion ?

Example ....

Recall the formula of refractive index

[tex]\sf \mu =\dfrac{sini}{sinr}[/tex]

As per the diagram

At AD angle of incidence i is

[tex]\\ \rm\Rrightarrow \gamma=sin^{-1}\left(\dfrac{1}{\dfrac{n_1}{n_2}}\right)[/tex]

[tex]\\ \rm\Rrightarrow \gamma=sin^{-1}\left(\dfrac{n_2}{n_1}\right)[/tex]

At AB's imaginary boundary line

Use snell's law

[tex]\\ \rm\Rrightarrow \dfrac{\mu_1}{\mu_2}=\dfrac{sin\alpha}{sin\beta}[/tex]

[tex]\\ \rm\Rrightarrow \mu_1sin\alpha=\mu_2sin\beta[/tex]

[tex]\\ \rm\Rrightarrow n_2sin\alpha=n_1sin\left(\dfrac{\pi}{2}-\gamma\right)[/tex]

[tex]\\ \rm\Rrightarrow n_2sin\alpha=n_1cos\left(sin^{-1}\left(\dfrac{n_2}{n_1}\right)\right)[/tex]

[tex]\\ \rm\Rrightarrow sin\alpha=\dfrac{n_1}{n_2}cos\left(sin^{-1}\dfrac{n_2}{n_1}\right)[/tex]

[tex]\\ \rm\Rrightarrow \underline{\boxed{\bf{\alpha=sin^{-1}\left[\dfrac{n_1}{n_2}cos\left(sin^{-1}\dfrac{n_2}{n_1}\right)\right]}}}[/tex]

Option A

Answer:

0.1 mm

Explanation:

60 sheets = 6 mm

We want 1 sheet so we divide both sides by 60 :

1 sheet = 6/60 mm

1 sheet = 1/10 mm

1 sheet is 0.1 mm

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The density of the metal sphere is 2 times the density of the liquid as proved.

The net upward force acting on the sphere as it is dropped into the liquid is calculated as follows;

F =  σVg - ρVg

ma =  σVg - ρVg  

where;

σV(a) =  σVg  - ρVg

σ(a) = σg  - ρg

σ(g/2) = σg -  ρg  

g(σ/2) = g(σ -  ρ)

σ/2 = σ -  ρ

σ/2 - σ = -  ρ

-σ/2 = -  ρ

σ = 2ρ

Thus, the density of the metal sphere is 2 times the density of the liquid as proved.

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The government are involved in a child or young person’s upbringing in my country by providing the right amenities and ensure the justice system is fair.

This is defined as the way an individual treated at a young age by older adults such as parents.

Providing amenities will ensure the upbringing of the child is easier and a fair justice system will help to control crime.

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The  mass of the large truck is determined as 5680 kg.

The mass of the truck is calculated as follows;

P = mv

where;

m = P/v

m = 125000/22

m = 5680 kg

Thus, the  mass of the large truck is determined as 5680 kg.

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Answer:

C. 5680

Explanation:

edg2023

Considering the definition of weight, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.

Mass is the amount of matter that a body contains and weight is the action exerted by the force of gravity on the body.

The mass of an object will always be the same, no matter where it is located. Instead, the weight of the object will vary according to the force of gravity acting on it.

The weight is calculated as the product of the mass of the object and the value of the gravitational acceleration or gravity:

Weight= mass× gravity

The value of the acceleration constant on Earth is 9.8 m/s². The weight is proportional to the mass of the object. The unit of weight is expressed in Newton (N).

In this case, you know:

Replacing on the definition of weight:

Weight= 180 kg× 9.8 m/s²

Solving:

Weight= 1764 N

Finally, on Earth's surface at sea level, the weight of an object with a mass of 180 kg is 1764 N.

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Answer:

75kg dining table

Explanation:

its the heaviest

more force would be required to push it

so it has greater inertia

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Answer:

C.

Explanation:

EDGE 2023

Answer:

about 1.5 bars

Titan's atmosphere is similar to Earth's both in the predominance of nitrogen gas and in surface pressure, which is about 1.5 bars, or 50 percent higher than sea-level pressure on Earth.

Explanation:

Answer:

xhxzguztyayrayhNzxlhhlिगजि

The mass of the box is 8.5 kg.

Mass can be defined as the quantity of matter contained in a body.

To calculate the mass of the box, we use the formula

Formula:

Where:

Make m the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, the mass of the box is 8.5 kg.

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A truck is moving with less velocity in the direction in which the truck is moving earlier because the truck has more momentum.

A truck is moving with the velocity of 10 m/s in the same direction in which the truck is moving earlier because the truck has more mass so it has more momentum. Due to collision, the velocity of the truck is slow down but can't be stopped because of high momentum in the truck.

So we can conclude that a truck is moving with less velocity in the direction in which the truck is moving earlier because the truck has more momentum.

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Given what we know, we can confirm that amongst the wave types mentioned both X-rays and radio waves are able to transmit energy through a vacuum.

This is due to the fact that unlike sound, water, and seismic waves that transmit energy through air, water, or the earth, the waves mentioned above, those being radio and x-rays, do not need a medium through which to propagate. This allows them to exist and transmit energy even in a vacuum such as outer space, which is corroborated by their existence in space.

Therefore, we can confirm that amongst the wave types mentioned both X-rays and radio waves are able to transmit energy through a vacuum.

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Answer:

we can confirm that amongst the wave types mentioned both X-rays and radio waves are able to transmit energy through a vacuum.

Explanation: Edmentum

Answer:

pound of bricks

meh wrong ? XD

Answer:

neither is heavier.both are equal

Explanation:

since 1 pound equals 16 oz.(1 pound=16 oz.).,both are equal too!

Answer:

Explanation:

We know the frequency and the velocity, both of which have good units. All we have to do is rearrange the equation and solve for

λ

:

λ

=

v

f

Let's plug in our given values and see what we get!

λ

=

340

m

s

440

s

−

1

λ

=

0.773

m

The statements true concerning the strips with a positive versus a negative hall voltage are a and d.

The hall voltage is the potential created across a current-carrying metal-strip when the strip is placed in a magnetic field perpendicular to the current flow in the strip. it is used as a research tool to probe the movement of charges in materials, as well as determining the blood flow rate.

The top strip possess positive charge carriers, and the electric field points are in the same direction as the electric force.

The bottom strip has negative charge carriers, and the magnetic force points upward along the plate.

This will create an equilibrium of the magnetic force and electrostatic force.

Thus, the correct option are a and d.

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The key difference between a bomb calorimeter and a coffee cup calorimeter is high temperature.

A bomb calorimeter is an apparatus that can measure heats of combustion, used in various applications such as calculating the calorific value of foods and fuels.

A coffee cup calorimeter is a cup used to provide insulation when materials are mixed inside of it.

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Answer:

200

Explanatio

sample ananswer

Answer:

108680.6 days

Explanation:

1 day = 24 hours there is 3600 seconds in 1 hour

so 24 * 3600 = 86400 so there is 86400 second in a day

so the take t = time s = seconds

t = 9.39 * 10^9s * 86400

t = 108680.6 days

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Answer:

they protect public safety and market fairness. For example, food safety regulations help protect consumers from pathogens that could cause widespread illness

Answer:

Government regulations are necessary because they protect public safety and market fairness. For example, food safety regulations help protect consumers from pathogens that could cause widespread illness. By creating regulations, the government can make food-borne illness less likely. However, even though these regulations are necessary, they must still meet constitutional requirements. Producers and consumers have the right to own and use property, among other constitutional rights.

Explanation:

EDGE 2023

Julia walks from the park, which is six blocks east of her house, to the store, which is three blocks east of her house. Julia walks for 5 minutes. This walk's average speed will be 1.2 blocks per minute. Option B is correct.

Displacement is defined as the shortest distance between the two points. Distance is the horizontal length covered by the body. While displacement is the shortest distance between the two points.

Displacement is a vector quantity .its unit is m.

The average velocity on this walk will be;

[tex]\rm v_{avg}= \frac{d}{t} \\\\ \rm v_{avg}= \frac{6 \ block+ 3 \ block }{5 \ minute } \\\\ v_{avg}=1.4 \ block /min[/tex]

Hence option B is correct.

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The cross-sectional area of the tape is determined as 3.9 x 10⁻⁵ ft².

The volume of the tape is calculated as follows;

volume = mass/density

volume = (1.95 lb)/(490 lb/ft³)

volume = 3.98 x 10⁻³ ft³

V  = AL

A = V/L

A = 3.98 x 10⁻³ ft³/102 ft

A = 3.9 x 10⁻⁵ ft²

Thus, the cross-sectional area of the tape is determined as 3.9 x 10⁻⁵ ft².

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Answer:

D. Energy is converted between kinetic and gravitational potential energy.

Explanation:

Within the visible spectrum, our experience of red is associated with a longer wavelength of light.

The electromagnetic spectrum is seen as colors: violet, indigo, blue, green, yellow, orange, and red.  Blue light has a very short wavelength, and so produces a higher amount of energy.

In the visible spectrum, the longer wavelengths that we perceive as red are followed by intermediate wavelengths for green and shorter wavelengths for blue and violet.

Our perception of red is connected to a longer wavelength of light within the visible spectrum.

Hence longer wavelength is the correct answer for blanks.

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