When two kinds of pulleys are used together the system is called

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Answer 1

Answer: They are called fixed and movable pulleys

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What is a bright, star like object in the galaxy core

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the sun is a bright star

sun idk :00000000000000000

The intensity or brightness of light depends on

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the square of the amplitude

Water changes shape to fill the shape of its container. what is the best explanation for this ?

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The answer would be that it is a liquid. It does not have a definite shape. That is why is takes the shape of what ever container it fits into.

Liquids don't have a definite shape so that means it does not take shape of its contaner but, solids do for example when you put water in a bown and freeze it up then it will stay there. Hope i helped :D

The sun's apparent motion across the sky from East to West daily is due to the A) rotation of the sun. B) rotation of the earth. C) orbit of the earth around the sun. D) orbit of the sun around the earth.

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B)rotation of earth because we rotate around the sun so when your area faces away from the sun it looks like the sun is setting in your point of view.

B) rotation of the earth.

The sun is relatively fixed. It is the rotation of the Earth that makes it appear as if the Sun is moving from East to West.

A strand of 10 lights is plugged into an outlet. How can you determine if the lights are connected in series or parallel? A) Unscrew one light. If the other lights stay on, it's a series circuit. B) Unplug the strand. If the first light stays on, it's a series circuit. C) Unscrew one light. If the other lights turn off, it's a series circuit. D) Cut the strand in half. If the plugged in half stays on, it's a series circuit

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Answer: C) Unscrew one light. If the other lights turn off, it's a series circuit.

Explanation:

In a series circuit, all the components in the same path. The current in the entire circuit is same. The voltage drop across each component is different. If one component does not work, the entire circuit breaks and other components also stop working. On the other hand, in a parallel circuit, voltage drop across all the components is equal. Trouble in one component does not effect other components.

Hence, to check whether the lights are connected in series or in parallel, one light should be unplugged and if the other lights still work, it means they are connected in parallel otherwise in series. Thus, correct option is C) Unscrew one light. If the other lights turn off, it's a series circuit.

this answer is c because a series series circuit only has one path unlike a parallel circuit which has multiple circuits.

A pendulum takes 0.5 second to complete one cycle. What is the pendulum’s period and frequency?

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That "0.5 second" that it takers to complete one cycle is the period.

Frequency = 1/period = 1/0.5 = 2 Hz.

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Vivid writing includes ___ descriptions of things that can be seen, touched, heard, smelled, and tasted. A. sensuous B. tangent C. tangible D. vociferous

A mass of gas under constant pressure occupies a volume of 0.5 m3 at a temperature of 20 degree Celsius. Using the formula for cubic expansion, what will be the volume at a temperature of 45 degree Celsius without a change in pressure?A) 0.5228938 m3 B) 0.0228938 m3 C) 0.5457875 m3 D) 0.0457875 m3