the distance between two stations is 300 km.a train takes 5 hours to cover this distance. calculate the speed of the train.​

Answer:

a. Information and Communication

Explanation:

The modern photographic camera evolved from the camera obscura. The functioning of the camera is very similar to the functioning of the human eye. The first permanent photograph was made in 1825 by Joseph Nicéphore Niépce.

Answer:

What kinds of microorganisms were found on the pillow and what kinds of allergy symptoms were caused by these microorganisms?

A human cannon ball with a mass of 80 kg is fired out of a cannon with a force of 2,400 N.  The acceleration is 30 m/sec²

The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration. The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.

force = mass . acceleration

a = F/m = 2400/80

a = 30 m/sec²

A human cannon ball with a mass of 80 kg is fired out of a cannon with a force of 2,400 N.  The acceleration is 30 m/sec²

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Answer:

LOL XDDDDDDDDDDDD SO FUNNNNYYYYYYYYYYYYYY WOOOOOOOWWWWW 69420

Explanation:

Answer:

I'm guessing d is the right one but not sure

Answer:

Explanation:

Friction is a force which opposes the relative motion of two objects in contact.

Answer: The resistance that one surface or object encounters when moving over another

Explanation: The action of one surface or object rubbing against one another.

Example: Sally rubbed the two sticks TOGETHER that is an example of friction.

The magnet produces a magnetic field. Item A makes the magnetic field in the electromagnet.

Explanation:

Item A is called a magnet. It has a North pole and a South pole. The electrons move from the North to the south poles, creating a magnetic force.

This Magnetic field creates a magnetic field around a magnet.

Answer: D

Explanation: it is made of metal which attracts the magnetic force field

Power is the rate at which work is done. James Watt is a famous engineer and inventor who developed the steam engine.

He improved the efficiency of the engine by adding a separate condenser, which reduced the amount of fuel needed. In his honor, the watt was named after him as the unit of power.

For the activity, here is a suggestion; conducting a survey of equipment and cars to find out the amount of horsepower of each item you check. You may visit a car dealer, an appliance store, a heavy-equipment dealer.

Make a list of the horsepower of at least ten items of equipment. Some suggestions include: comparing two or three different makes of cars or finding the horsepower of a lawn mower, boat, vacuum cleaner, or some heavy equipment for moving dirt. You may find that the power of a washing machine or vacuum cleaner is given in watts instead of horsepower. Make a chart to record your findings, including:

Type of Equipment Surveyed: (Indicate whether it is a car, shovel, vacuum cleaner, etc.)

Amount of Horsepower or Watts: (Record power in horsepower or in watts.)

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Answer: 1. Material being transported 2. The temperature of the material being transported 3. How long the pipes will be there (lifespan)

Explanation: 1. - The pipe builder should consider the material being transported to choose the correct material of the pipes to use, so they last long and can hold the material.

2. - Similar to 1, the pipe builder should consider the temperature of the material to choose the correct material of the pipes to use, so the pipes don’t break and function properly.

3. - If the pipe builder uses a material that can hold the material, that’s great! If that material will last a short time, it would not work if the pipes were to be used for a long time.

The things you said before about viscosity, density, and pressure are also correct. The correct answers are mainly talking about factors of the material being used in the pipes.
hope this helped :)

Answer:

if you are trying to figure out if it is right. I believe it is right (the answer) but trust your instincts go for it.

Explanation:

The charge on sphere A is -3 × 10⁻⁷C.

According to the question, there are two identical spheres, sphere A and sphere B with charges

q₁= -1.6 × 10⁻⁶C , and

q₂=+1.0 × 10⁻⁶ C respectively separated by a distance of 2m.

Now, the charges are brought in contact with each other. So the total charge on both the spheres when they are in contact would be the sum of the two charges, that is:

q = q₁ + q₂

q =  -1.6 × 10⁻⁶C  + 1.0 × 10⁻⁶ C

q =  -0.6 × 10⁻⁶C, or

q = -6 × 10⁻⁷C

Since the two spheres are identical, when they are separated from each other, the charge is distributed equally on both of them. So, the charge on each sphere is :

Q = q/2

Q = (-6 × 10⁻⁷C)/2

Q = -3 × 10⁻⁷C

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Answer: first one: a second: b

3rd: induction

4rth:conduction

Explanation:

i had these question

Answer:

your hypothesis is wrong.

Explanation:

Sorry I dont really know tell me if I'm correct

Answer:

hypothesis is wrong

Explanation:

The faster an object is going, the more resistance there will be. An example of this would be if you're running the faster you run, the more air is going against you.

I hope this helps!

40g remains after an hour.

Answer:

c)

Explanation:

b) and d) are incorrect because there is only one wave, but there are two fields.

a) is incorrect because the electric field and magnetic field are not parallel, they are perpendicular, or 90 degrees to one another, so this means:

c) is correct.

Answer:

wait i did this before

Explanation:

Answer:

A, C, E

Explanation:

Answer:

First is incrcersing mangnetic field second photosphere

Explanation:

sorry if the first one is wrong

Answer:

\(V = 364.6ms^{-1}\)

Explanation:

Given

\(Temperature = 56C\)

Required

Determine the velocity of sound wave

The relation ship between velocity of sound wave and temperature is determined by the following formula;

\(V = 331 + 0.6 * T\)

Where T represents Temperature and V represents Velocity

Substitute 56 for T

\(V = 331 + 0.6 * 56\)

\(V = 331 + 33.6\)

\(V = 364.6ms^{-1}\)

Hence, the velocity of sound wave in that room is \(V = 364.6ms^{-1}\)

Answer:

long answer so its below lol

Explanation:

You can tell if the science is "real" or supported based upon if there have been multiple experiments showing the same/smiliar answer, it has been proven by professionals, or if the science is published by professionals and such

Answer:

hold up ill see

Explanation:

dont know this tho

In an analogy of a circuit with a resistance to an obstacle race, we can consider various elements of the race as representative of different components of the circuit.Obstacles, Track or Route, Participants, Start and Finish Line.

Obstacles: The obstacles in the race represent the resistors in a circuit. Just as resistors impede the flow of current in a circuit, obstacles in the race create hurdles that slow down the participants. The difficulty or magnitude of the obstacles can be equated to the resistance value of the resistors in a circuit.

Track or Route: The race track or route itself can be seen as the conductive path in a circuit. It provides a pathway for the participants to move and complete the race. Similarly, the conductive path in a circuit allows the flow of current from the power source to the load.

Participants: The people participating in the race represent the flow of electrons in a circuit. Just as the participants move through the obstacles in the race, electrons move through the resistors in a circuit. The rate at which participants complete the race can be compared to the current flowing through the circuit.

Start and Finish Line: The start and finish line of the race correspond to the terminals of a circuit. The start line represents the positive terminal, where the participants begin their journey, and the finish line represents the negative terminal, where the race concludes.

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Answer: As an analogy of a circuit with resistance, the obstacles in an obstacle race represent the resistance in a circuit. The parts of the circuit that the obstacles represent are the resistors. The people in the obstacle race represent the current in a circuit. The current is the flow of charged particles (such as electrons) in a circuit. In an obstacle race, the people are moving through the obstacles, just as the charged particles are moving through the resistors in a circuit. The obstacles slow down the people, just as the resistors slow down the flow of charged particles in a circuit.

Explanation:

Answer: It would take 2.3 billion years for the biological reaction without the presence of enzymes. It’s because, without them, your body can’t break down foods so that nutrients can be fully absorbed. Every organ, every tissue, and every 100 trillion cells in our body rely upon the reaction of metabolic enzymes and their energy component.

Explanation:

I hope this helps

Answer:

sorry i throght i had the answer

Explanation:

Answer: hope this helps ♡

A: Parallel

Explanation:

It's a parallel circuit because it has two or more paths for the electricity to flow through (the paths are parallel).

Answer:

A

Explanation:

Answer: I am so sorry but I am not sure I have spent 15 minutes trying to figure this out

Explanation:

Answer:

As it states that "to every action,there is equal and opposite reaction". similarly,when a dolphin swim it pushes the water in the backwards direction as an action The water pushes the dolphin in the forward direction.Thus the dolphin can move through water.

Explanation:

It may help you

a) The dolphins swimming in the water As the dolphins swim through the water, they act on the water, pushing it aside and backwards. The water exerts an equal and opposite reaction on the dolphins, propelling them forward.

Answer:

Object a

Explanation:

Answer: object a

Explanation:

Answer: Room temperature

Explanation: it makes sense (sorry if its wrong)