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never [62]
3 years ago
12

Select the correct answer. Samuel adds a teaspoon of salt to a glass of water. He notices that the salt disappears. Samuel takes

a sip to discover that the water tastes salty. What kind of change has occurred? A. It’s a chemical reaction because a new substance has formed. B. It’s a physical change because the water and the salt kept their original properties. C. It’s an example of synthesis because two substances reacted to give one substance. D. It’s a chemical reaction because the water now tastes salty but originally did not.
Physics
1 answer:
borishaifa [10]3 years ago
8 0

Answer:

A

Explanation:

A chemical reaction is a process that leads to the chemical transformation of one set of chemical substances to another. Therefore it can not be any of the other answers because the substance was water at first but now its salty water.

ps what kind of person would drink water after you put salt in it lol.

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If Planet Y orbits the Sun but does not rotate on its axis at all, how long would a day be on Planet Y?
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Three capacitors with individual capacitances of 2 μF, 5 μF, and 10 μF
rodikova [14]

Answer:

1.25C

Explanation:

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1.25 = Charge/12

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What is the solar system composed of?
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A 0.25 kg ball is suspended from a light 0.65 m string as shown. The string makes an angle of 31° with the vertical. Let U = 0 w
steposvetlana [31]

Explanation:

a) The height of the ball h with respect to the reference line is

h = L - L\cos{31°} = L(1 - \cos{31°})

so its initial gravitational potential energy U_0 is

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\:\:\:\:\:=(0.25\:\text{kg})(9.8\:\text{m/s}^2)(0.65\:\text{m})(1 - \cos{31})

\:\:\:\:\:=0.23\:\text{J}

b) To find the speed of the ball at the reference point, let's use the conservation law of energy:

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Note that the mass gets cancelled out and then we solve for the velocity v as

v = \sqrt{2gL(1 - \cos{31°})}

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