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vampirchik [111]
4 years ago
7

A compound is a pure substance that is composed of more than one type of element. Which of the following statements is true of c

ompounds?
Compounds can be decomposed into their component parts through physical processes.

There is only one type of compound, so they all have similar characteristics and compositions.

Compounds have definite chemical compositions that can be described by chemical formulas.

Compounds have properties which are identical to the properties of their component elements.
Physics
1 answer:
alina1380 [7]4 years ago
3 0

A compound is a pure substance that is composed of more than one type of element. The statement that is true of compounds is that compounds have definite chemical compositions that can be described by chemical formulas.

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A soccerball is kicked straight out from a hill at 15 m/s and lands 42m away. how tall is the hill
ozzi

Answer:

The height of the hill is, h = 38.42 m

Explanation:

Given,

The horizontal velocity of the soccer ball, Vx = 15 m/s

The range of the soccer ball, s = 42 m

The projectile projected from a height is given by the formula

                             S = Vx [Vy + √(Vy² + 2gh)] / g

Therefore,

                            h = S²g/2Vx²                     (Since Vy = 0)

Substituting the values

                             h = 42² x 9.8/ (2 x 15²)

                                = 38.42 m

Hence, the height of the hill is, h = 38.42 m

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4 years ago
In the seventeenth century, Robert Hooke conducted many experiments with springs. In all the data he recorded, he found that the
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The explanation of the relationship between load and extension is not in Hooke's Law.
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A criminal suspect must be read his or her rights when arrested.this process is referred to as
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That process is called the Miranda rights
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Which one of these exercises gets your heart pumping? *
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Most grandfather clocks have pendulums with adjustable lengths. One such clock gains 10 min per day when the length of its pendu
7nadin3 [17]

The length to which the pendulum will be adjusted to keep perfect time is 29.59 inches. See the explanation below.

<h3>What is the justification for the above answer?</h3>

T1 = 2πR√(L1/GM)

and

T2 = 2πR√(L1/GM)

T1/T2 = √(L1/L2).

If the pendulum has an efficient period, that means it executes with perfect frequency.

Thus,

T2 = (24 * 60)/x

= 1440/x

This means that in one day, there are perfect cycles of represented by "x". Note that there are 1440 minutes in one day.

If the other Pendulum is slower by 10 minutes, that means

T1 = 1450/x

Hence

(1450/x)/(1440/x) = √(L1/L2).

⇒ 1450/1440 = √(L1/L2).

Thus,

(1450/1440)² = 30/L

L = 30/(1450/1440)²

L = 30/(1.00694444444)²

L = 30/1.01393711419

L = 29.5876337695

L $\approx$ 29.59 inches.

Hence, the pendulum will need to be adjusted by 29.59 inches to ensure that the clock keeps perfect time.

Learn more about pendulum problems:

brainly.com/question/16617199

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