PHYSICS HIGH SCHOOL

Oliver weighs 600. N. He climbs a flight of stairs that is 3.0 meters tall in 4.0 seconds.a. How much work did he do?
b. What was Oliver’s power in watts?

Answers

Answer 1
Answer: L=G·d
L=600N·3m=1800J
P=L/Δt=1800J/4s=450W

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When you turn on the light switch in a room, you have completed the _____. open circuit series circuit parallel circuit switch circuit
If the amplitude of the resultant wave is twice as great as the amplitude of either component wave, and this wave exhibits reinforcement, the component waves must A. be traveling in the opposite direction of the resultant wave. B. have a different frequency than the resultant wave. C. be in phase with each other. D. have a different wavelength than the resultant wave.

Organisms produce their own energy or provide energy for other organisms in a food chain. Many different organisms can be found in the Amazon rainforest in South America. Organisms in this biome include a variety of trees, plants, insects, fish, birds, reptiles, and mammals. The jaguar and anaconda are among the largest predators found in the Amazon.

Answers

The correct answer is TRUE. Organisms produce their own energy or provide energy for other organisms in a food chain. Many different organisms can be found in the Amazon rainforest in South America. Organisms in this biome include a variety of trees, plants, insects, fish, birds, reptiles, and mammals. The jaguar and anaconda are among the largest predators found in the Amazon.

Answer:

D on ed 2020

Explanation:

The two most commomly styles used to format academic papers are ?

Answers

Good evening,

From middle school to college, the two most widely used formats are MLA and APA for writing essays.

-Hope this helps!

Humans can hear frequencies up to approximately 20,000 Hz, while dogs can hear frequencies up to around 60,000 Hz. What sound frequency would you expect to be emitted by a dog whistle, which can be heard by dogs but not by humans?

Answers

Answer:

Between 23,000 to 54,000 Hz

Final answer:

A dog whistle typically emits sound at frequencies above 20,000 Hz but below 60,000 Hz, which is a range humans cannot hear but dogs can.

Explanation:

The frequency of sound emitted by a dog whistle is typically above the range of human hearing, which upper limit is around 20,000 Hz. However, since dogs can hear up to about 60,000 Hz, you would expect a dog whistle to emit sound at frequencies above 20,000 Hz but below 60,000 Hz. So, a frequency anywhere within the range 20,000 Hz and 60,000Hz would be suitable for a dog whistle.

Learn more about Dog Whistle here:

brainly.com/question/32352657

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If the current R1 is 2A, what is the current through R2?

Answers

If the 2 resistors are in series in the same circuit, then
the current is the same at every point in the circuit, so
it's the same through each resistor.

If they're in parallel, then it depends on the values (resistance)
of both resistors.

Frost wedging happens when _____.water ions dissolve rock minerals
water freezes inside a rock, causing it to break
oxygen reacts with the chemicals in rock
rocks break from repeated exposure to the Sun's heat

Answers

Answer: water freezes inside a rock, causing it to break

Weathering is a natural process in which the rocks break into pieces or sediments by the action of wind, water and chemical agents. Frost wedging is a physical weathering process. It occurs in an area where temperature fluctuations occurs due to change in the climatic conditions. This occurs due to rapid heating and cooling. The rocks lying in a cold environment, the water residing in the rocks gets freezed. The water in ice form that is solid form acquire more space than in liquid form, therefore, the developed ice will affect the physical structure of the rock. The formation of ice results in the development of break or crack in the rock typically in the shape of a wedge and thus the phenomena is called as frost wedging.

Hence, frost wedging happens when water freezes inside a rock, causing it to break.

Answer:

Frost wedging happens when water freezes inside of a rock, causing it to break

Which of the following does not accurately depict a scientific theory?A. Theories are tested over and over again.
B. Theories are supported in many ways.
C. Theories may be changed or replaced if new evidence is found.
D. Theories are absolute truths.

Answers

Scientific theories are not absolute and unquestionable truths: they are the best explanation of the data, but they can be challenged if  new data is discovered or if a new theory is found that fits to and explains the data even better!
The best answer is d: this is not an accurate description of a scientific theory!
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