Brian is repairing an old alarm clock. He needs to replace a device that converts the electric energy into sound energy. Which of these devices should he use?
A.
battery
B.
buzzer
C.
motor
D.
switch

Answer:

Please find the graph file in the question:

Explanation:

The D and E will be having the same temperature as they lie on the same line drown from the temp axis if it was drawn.

Answer:

A simple machine that may be used the most often is called the wheel and axle. The wheel and axle has two basic parts: wheel and axle.  It has two circular objects which includes a larger disc and a small cylinder both joined at the center.

Explanation:

Explanation:

A simple machine that may be used the most often is called the wheel and axle. The wheel and axle has two basic parts: wheel and axle. They can be found everywhere. It has two circular objects which includes a larger disc and a small cylinder both joined at the center.The large disc is the wheel, and the small cylinder or rod is the axle. There may be two wheels attached to the axle.

There are two basic ways a wheel and axle can work together to help move things.

1. The Force is applied to the Wheel

For example, a screwdriver is an example of a wheel and axle. The handle is the wheel where the force is applied. It turns or spins and increases the force of the shaft or axle, which helps turn the screw.

Another example of force being applied to the wheel is when a doorknob is turned. The wheel (doorknob) is turned and the locking mechanism connected to the shaft turns and the door can then be opened.

2. The Force is applied to the Axle

A Ferris wheel is an example of force being applied to the axle. When the axle turns it results in the giant wheel turning. The wheel is much larger than the axle and covers more distance and area. A ceiling fan works the same way.

Answer:

the answer is 80 degrees

Explanation:

Answer:

B:O

Explanation:

As acceleration is the rate of change of velocity with time, if velocity is uniform, there will be no change in it and acceleration will be zero.

Hi there!

[tex]\large\boxed{\text{a) F = m * a}}[/tex]

According to Newton's Second Law, force is calculated with the formula:

F = m × a, where:

F = force (N)

m = mass (kg)

a = acceleration (m/s²)

Answer:

The Answer Is A . F= ma

Rerember Newtons second law of motion.

Explanation:

Weight/gravity - Downwards

Normal force - Upwards

keep in mind that the length of the arrows of both the weight and the normal forces have to be equal since these are vectors and are equal to each other to cancel each other out

Answer:

the mushrooms

mushrooms are decomposers because they break down organic material around them.

lhormmia  masng ies igentetel

Explanation:

Answer:

kinetic energy as it involves dispersal of energy

The type of wave that occurs where two different mediums meet is known as a transverse wave. Hence, option A is correct.

Wave is the regular, systematic spread of disturbances from one location to another. The ripples that travel on water's surface are the most well-known, but waves also exist in sound, sight, and the movement of subatomic particles.

The disturbance periodically oscillates with a set frequency and wavelength in the simplest waves. In contrast to electromagnetic waves, which can travel in a vacuum, mechanical waves, like sound, need a medium to move through. The characteristics of the medium affect how a wave travels across it.

A transverse wave's crest and trough are the high and low points, respectively. The shock absorbers and rarefactions of longitudinal waves are comparable to the troughs and crests of transverse waves. The wavelength is the separation between subsequent crests or troughs.

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Answer:

Kinetic energy is 1187.5J

Answer:

They are because 1. New years culture benefits 2. Gives the right amount of heat as well as a day/ night cycle and the 4 seasons because of the earths tilt

Answer:

Explanation:

Our lives on earth are directly connected to the sun and our solar system because they give the right amount of heat and as well as the day and night cycle. Furthermore, due to the earth’s tilt, we get our four seasons which are very important to us as humans, getting different seasons and weather conditions.  

The solar system also affects the tides and  

A Long time ago, the Moon was closer to the Earth and spinning rapidly. The Moon’s tidal bulges didn’t align with the Earth, and the Earth’s gravity tugged on them, slowing the Moon’s spin and moving it farther away. As it moved farther away, the time it took to orbit once around the Earth increased: Its orbital period got longer. Eventually, the lengthening rotation of the Moon matched how long it took to go around the Earth. When that happened, the axis of the bulges pointed right at the Earth. That’s why the Moon only shows one face to us! It spins once per month and goes around us once per month.

Gravity is a force, and it weakens with distance. An important thing to note is that we measure gravity from the center of mass of an object, not its surface. One way to think of the center of mass of an object is the average position in an object of all its mass. For an evenly distributed sphere, that’s its center.

Since gravity weakens with distance, the force of Earth’s gravity on your head is less than it is on your feet, it’s way too small for you to ever notice. This change in the force of gravity over distance is what astronomers call the tidal force. The overall effect of the tidal force is to stretch an object.

The Moon has gravity. Just as the bulge is pulling the Moon ahead, the Moon is pulling the bulge back, slowing it down. Because of friction with the rest of the Earth, this slowing of the bulge is actually slowing the rotation of the Earth itself, making the day longer. The effect is small, but it’s measurable.

The constellations and astronomy give us our zodiac signs, and from previous knowledge, I know that zodiac signs impact our personalities greatly. If constellations were not found then zodiac signs wouldn’t have been created.  

Answer:

Unit of pressure is pascal (Pa)

The SI-derived unit of measurement for pressure. The pascal is one newton (an SI-derived unit itself) per square meter.

The answer is A, Hope this helps and sorry for being late :)

Answer:

Acceleration (b) not sure tho

Explanation:

(a) 10N

The sketch of the two cases has been attached to this response.

Case 1: The box is pushed by a horizontal force F making it to move with constant velocity.

In this case, a frictional force [tex]F_{r}[/tex] is opposing the movement of the box. As shown in the diagram, it can be deduced from Newton's law of motion that;

∑F = ma    -------------------(i)

Where;

∑F = effective force acting on the object (box)

m = mass of the object

a = acceleration of the object

∑F = F -  [tex]F_{r}[/tex]

m = 50kg

a = 0   [At constant velocity, acceleration is zero]

Substitute these values into equation (i) as follows;

F -  [tex]F_{r}[/tex] = m x a

F -  [tex]F_{r}[/tex] = 50 x 0

F -  [tex]F_{r}[/tex] = 0

F =  [tex]F_{r}[/tex]            -------------------(ii)

Case 2: The box is pushed by a horizontal force 1.5F making it to move with a constant velocity of 0.1m/s²

In this case, the same frictional force [tex]F_{r}[/tex] is opposing the movement of the box.

∑F = 1.5F -  [tex]F_{r}[/tex]

m = 50kg

a =  0.1m/s²

Substitute these values into equation (i) as follows;

1.5F -  [tex]F_{r}[/tex] = m x a

1.5F -  [tex]F_{r}[/tex] = 50 x 0.1

1.5F -  [tex]F_{r}[/tex] = 5            ---------------------(iii)

Substitute [tex]F_{r}[/tex] = F from equation (ii) into equation (iii) as follows;

1.5F - F = 5            

0.5F = 5            

F = 5 / 0.5

F = 10N

Therefore, the value of F is 10N

Answer:

113 grams

Explanation:

She put them on a balance and added two 50 g weights, one 10 g weight, and three 1 g weights so that the balance was even.

Two 50 g weights = 100 g

One 10 g weight = 10 g

Three 1 g weights = 3 g

Total weight = 100 g + 10 g + 3 g

= 113 g

So, the mass of her earrings is 113 grams.

Answer:

This is newton's 3rd law

Explanation:

Answer:

I think it would be the second answer...

Explanation:

Hope this helps!

Lucas do a work of 0 joule. Hence, option (B) is correct.

The notion of work in science is significantly different from what it is understood to entail in ordinary life. Every time work is performed, energy is transmitted, as shown by the definition of work in physics.

A force must be applied and there must be movement in the force's direction for a work to be completed scientifically. Having said that, we may state that The product of the component of the force acting in the displacement's direction and its magnitude is work.

Mathematically work done can be expressed as:

work done = force × displacement × cosθ

Where θ is the angle between the force and the displacement .

Here, the  car remains stuck, that means, no displacement happens. So. Lucas do a work of 0 joule.

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Answer:

Water takes more energy to heat up

Answer:

It is 40.08 g

Explanation:

[tex]6.02 \times 10 {}^{23} \: atoms = 1 \: mole = 40.08 \: g[/tex]

1.875

Explanation:

speed = distance moved ÷ time taken

Answer:

1. B has no acceleration because the straight line shows that it's a constant speed not speeding up or down.

2. A because you can see the decline in speed as time goes on

Answer:

Chupapi moñaño mi bola mcnfjdjdkdjdkek

Explanation:

Two loudspeakers are about 10 m apart in the front of a large classroom. If either speaker plays a pure tone at a single frequency of 400 Hz, the loudness seems pretty even as you wander around the room, and gradually decreases in volume as you move farther from the speaker. If both speakers then play the same tone together, what do you hear as you wander around the room?

A. The sound is louder but maintains the same relative spatial pattern of gradually decreasing volume as you move away from the speakers.

B. The pitch of the sound increases to 800 Hz, and the sound is louder but not twice as loud. It is louder closer to the speakers and gradually decreases as you move away from the speakers−except near the back wall, where a slight echo makes the sound louder.

C. As you move around the room, some areas seem to be dead spots with very little sound, whereas other spots seem to be louder than with only one speaker.

D. The sound is twice as loud−so loud that you cannot hear any difference as you move around the room.

E. At points equidistant from both speakers, the sound is twice as loud. In the rest of the room, the sound is the same as if a single speaker were playing.sanro de la pinga Chupamelo

Answer:

3.2 seconds

Explanation:

50 swings = 2 mins 40 secs

= 50 swings = 2 x 60 + 40 secs

= 50 swings = 160 secs

= 1 swing = 160 / 50 secs

= 1 swing -= 3.2 secs

Answer:

5 m/s

Explanation:

As the ball falls to the ground, it is acted upon by a force which is due to the gravitational force. Hence, the ball falls with an acceleration called the acceleration due to gravity.

Let us assume that the acceleration due to gravity (g) = 10 m/s², Since initially, the body was at rest, hence the initial velocity (u) = 0 m/s. The height to the ground (h) = 1.3 m. Hence using the equation of motion, the final velocity (v) is:

v² = u² + 2gh

Substituting:

v² = 0² + 2(10)(1.3)

v² = 26

v = √26 = 5

v = 5 m/s

Answer:

The force of repulsion is 17.802 N

Explanation:

Given;

magnitude of the first charge, q₁ = 8.6 x 10⁻⁶ C

magnitude of the second charge, q₂ = 2.3 x 10⁻⁴ C

distance between the two charges, r = 1 m

The force of repulsion is calculated using Coulomb's law;

[tex]F = \frac{Kq_1q_2}{r^2} \\\\F = \frac{9\times 10^9 \times 8.6\times 10^{-6} \times 2.3\times 10^{-4}}{1^2} \\\\F = 17.802 \ N[/tex]

Therefore, the force of repulsion is 17.802 N

Answer:

C

Explanation:

I think it's industrial revolution because many industries were developed which emitted a lot of carbon gases in the atmosphere.

The Industrial Revolution events led to a major imbalance in the carbon cycle. The correct option is C.

The Industrial Revolution, which began in the late 18th century and continued through the 19th century, led to a major increase in the burning of fossil fuels such as coal, oil, and gas. This led to a significant increase in carbon emissions and a disruption of the natural carbon cycle.

Prior to the Industrial Revolution, the carbon cycle was relatively balanced, with carbon being naturally cycled through the atmosphere, oceans, plants, and animals. However, the burning of fossil fuels has released large amounts of carbon dioxide(CO₂) into the atmosphere, which has led to an increase in atmospheric carbon dioxide(CO₂) levels and contributed to global warming and climate change.

Other historical events such as the American Revolution, American Civil War, and the Renaissance did not have a significant impact on the carbon cycle in the same way that the Industrial Revolution did.

Therefore, The correct answer is C i.eThe Industrial Revolution.

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MT⁻¹

Given equation:

F = Kv        --------------(i)

Where;

F = Magnitude of force experienced by the object

v = speed at which the object is moving

K = constant.

To get the dimension of K, follow the following steps:

i. Make K subject of the formula in equation(i)

K = F / v

ii. Get the dimension of force F and speed v

Dimension of force = MLT⁻²

Dimension of velocity = LT⁻¹

iii. Substitute these dimensions into the result of (i) above;

K = MLT⁻² / LT⁻¹

iv. Simplify the result in (iii)

First, the Ls in the numerator and denominator will cancel out

K = MT⁻² / T⁻¹

Next, the Ts will be expressed as follows

K = MT⁻² x T¹           [using the law of indices]

K = MT⁻²⁺¹

K = MT⁻¹

Therefore, the dimension of K is MT⁻¹