PHYSICS HIGH SCHOOL

You put a piece of ice into a glass of lemonade at room temperature. Which statements explains the heat flow in this scenario? A. Heat flows in both directions. B. Heat flows from the ice to the lemonade. C. Heat flows from the lemonade to the ice. D. Heat flows from the ice to the lemonade to the glass.

Answers

Answer 1

Answer:

Answer:

C. Heat flows from lemonade to the ice

Explanation:

Transfer of heat from the drink to the ice is what melts the ice and cools the drink.

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Tony walks at an average speed of 70 m/min from his home toschool. If the distance between his home and the school is
2100 m, how much time does it take for Tony to walk to
school?
min

Answers

Answer:

The answer is 30 min

Explanation:

t = s/v

v = 70 m/min, s = 2100 m

t = 2100/70 = 30 min.

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What is different about parasitism compared to the other biological relationships such as mutualism, predation, competition, and commensalism?

Answers

Answer: parasitic organisms cause harm to other organisms.

Answer:

parasitic organisms cause harm to other organisms.

Explanation:

What kinds of telescopes are used to measure parallax

Answers

Hipparcos is used to measure parallax

Which of the following group 7A elements is the most reactive?

Answers

Among the elements in group 7A, the most reactive would be Fluorine. Fluorine is a major component of toothpaste, what we use to brush and clean our teeth with. It is so reactive that it cannot be contained in glass.

what is the most likely reason that a hypothesis would be useful even if experiments show that is false

Answers

Answer:

An observation is made. To understand why the phenomenon is occurring, a hypothesis is built up which can be tested by a scientific method. The result of the experiment can be true or false.

If the result false, it implies that the dependent and independent variables are not related and a new experiment must be designed or a modification is required in the experiment.

Thus, even if the result is false, the hypothesis would be useful because conclusions can be drawn from it and next course of action can be defined.

You are able to test your hypothesis if you do your experiment again.

A motor with a power of 7.0 × 104 watts lifts a loaded elevator to a height of 20.00 meters for 40 seconds. What is the force exerted by the motor on the elevator?