Which type of energy transfer occurs when a beaker of water is heated on a hot plate?

Answers

Answer 1

Answer:

Answer:

Convection is the transfer of thermal energy from one place to another by the movement of gas or liquid particles. How does this happen? As a gas or liquid is heated, the substance expands. This is because the particles in liquids and gases gain kinetic energy when they are heated and start to move faster.

Answer 2

Answer:

Answer:Convection is the transfer of thermal energy from one place to another by the movement of gas or liquid particles. How does this happen? As a gas or liquid is heated, the substance expands. This is because the particles in liquids and gases gain kinetic energy when they are heated and start to move faster.

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Imagine you are in an open field where two loudspeakers are set up and connected to the same amplifier so that they emit sound waves in phase at 688 Hz. Take the speed of sound in air to be 344 m/s. Part A. If you are 3.00 m from speaker A directly to your right and 3.50 m from speaker B directly to your left, will the sound that you hear be louder than the sound you would hear if only one speaker were in use? a. yes b. no Because the path difference is equal to the wavelength of the sound, the sound originating at the two speakers will interfere constructively at your location and you will perceive a louder sound. Part B. What is the shortest distance d you need to walk forward to be at a point where you cannot hear the speakers? The forward direction is defined as being perpendicular to a line joining the two speakers and you start walking from the line that joins the two speakers. Express your answers in meters to three significant figures. d = m
What is t in the formula of Q=m C t

what would be the final temperature of a mixture of 50g water at 20c temperature and 50g of water at 40c temperature?

Answers

Because there is the same amount of water in each sample, the samples have an equal amount of influence over the overall temperature. that means it will be somewhere right in the middle of the two original temperatures. The middle, also the average, of the two samples' temperatures is 30c, meaning that if you combined the 20c water and the 40c water the final result would be 100g of 30c water. If you need some more explanation, just ask.

Which type of wave requires a medium in which to travel? A) Heat B) Electromagnetic C) Light D) Mechanic

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Answer:

Explanation:

What is refractive index?

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The refractive index of a substance is the ratio . . .

(speed of light in vacuum) divided by (speed of light in the substance) .

So the speed of light in a substance is

(299,792,458 meters per sec) divided by (the refractive index of the substance).

A cheetah ran 300 feet in 2.92 seconds. What was the cheetah’s average speed in miles per hour?

Answers

We will first convert feet to miles:
1 foot = 0.00018939 miles
300 foot = 0.056817 miles
Than seconds to hours:
2.92 seconds = 0.04867 minutes = 0.0008111 hours
Average speed :
v = d / t
v = 0.056817 miles / 0.008111 h
v = 70.05 miles per hour

A pulley system has an efficiency of 74.2%. If you perform 200 J of work, howmuch useful work does the pulley perform?
A. 52 J
B. 113 J
C. 148 J
D. 200 J
SUBMI

Answers

Answer:

Explanation:

If a pulley system has an efficiency of 74.2%, then only that fraction of the work performed will be useful. 74.2%=0.742. 0.742*200 is about 148J. Hope this helps!

Which event can be excluded from a list of interactions among Earth's spheres?A solar flares
B volcanic eruption
C fracking for natural gas
D hurricane

Answers

Final answer:

Solar flares can be excluded from a list of interactions among Earth's spheres because they are not directly related to interactions among the geosphere, hydrosphere, atmosphere, and biosphere.

Explanation:

The event that can be excluded from a list of interactions among Earth's spheres is A solar flares. Solar flares are not directly related to interactions among Earth's spheres, which include the geosphere, hydrosphere, atmosphere, and biosphere.

On the other hand, volcanic eruptions, fracking for natural gas, and hurricanes are all examples of interactions among Earth's spheres. Volcanic eruptions involve the release of gases and materials from the geosphere into the atmosphere. Fracking for natural gas involves extracting resources from the geosphere and potentially impacting the hydrosphere. Hurricanes involve interactions between the atmosphere and the hydrosphere, resulting in powerful storms.

Therefore, the correct answer is A solar flares.

Learn more about Interactions among Earth's spheres here:

brainly.com/question/34789152

#SPJ3

Hurricane is the answer

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