Two strings of equal length are stretched out with equal tension. The second string is four times as massive as the first string. If a wave travels down the first string with velocity v , how fast does a wave travel down the second string?

Answers

Answer 1

Answer: It travels at a velocity of "4v"

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It Refers to the emission of electrons from a metal when light shines on metal. Example: static electricity

Help!!!!1. A material that can be hit without shattering is?
viscous, flammable, hard, malleable
2. At room temp., a substance with a melting point of 40% C is a?
solid, liquid, gas, mixture
3. what action involves a chemical change?
making ice cubes,adding sugar to tea, cutting wrapping paper, baking a cake
4.a substance that has a little tendency to change into other substance is said to have low?
reactivity, viscosity, density, conductivity
5. formation of a precipitate is usually evidence of?
the separation of a mixture, a chemical change, formation of a mixture, physical change

Answers

1. For the first one if it doesn't shatter then it is hard.
2. We sould consider that room temperature is usually from 18°C (64°F) to 23°C (73°F) and since the melting point of the substance is 40˚C the substance is liquid, because is melting point not an evaporation point it just melts from solid to liquid.
3. Well, in this one we have to consider that a chemical change it change the thing completely. So in this case is baking a cake because the products make the cake stop being them self and created something else.
4. It tends to have low reactivity. This is because viscosity means something like honey very sticky , density is how hard it is and lastly the conductivity I would believe is to pass electricity or current.
5. It is a physical change because the evaporated water transforms again into water and then fall as rain, snow or ice.
Hope it helped <3

Work is being done in which of these situations? all motions are at a constant velocity

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Where the force is not perpendicular to the path of motion

are you missing the the situations ?

Evaporation only occurs at the surface of a liquid

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yes

evaporation starts on the surface

How much work is done on a a 60 n box of books that you carry horizontally across a 6 m room?

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W = F x s cos thita.
= 60 x 6 x cos thita
since it is horizontal, thus the angle will be 90 degrees.
Thus, W = FS 90 degree.
Since the angle is 90 degree, cos thita will become zero.

thus, W = 60 x 6 x 0
=0
Thus, work done will be zero.

the work done on a a 60 n box of books that you carry horizontally across a 6 m room is 0

Yellow light has a longer wavelength than green light. Which color of light has the higher frequency?

Answers

well wavelength=(speed of wave)/frequency
so if wavelength is longer the frequency is shorter
since yellow light has longer wavelength than green light
yellow light has a shorter frequency than green light
so green light has a higher frequency

A whale comes to the surface to breathe and then dives at an angle of 20.0 ∘ below the horizontal. If the whale continues in a straight line for 200 m , how deep is it?

Answers

Answer:

The depth is 68.4 meters.

Explanation:

In this question the whale rose to the surface of the ocean to breath and then dives into the ocean at an angle of 20° below the horizontal line. It then travels 200 m straight along this line. We have to determine the depth of the ocean.

The path of the whale forms the hypotenuse of a right triangle and the angle between the hypotenuse and base is given as 20°. Determination of sides or angles in a right triangle can be determines using trigonometry.

sinθ = $((opposite \ side))/(hypotenuse)$