Arope with a mass density of 1 kg/m has one end tied to a vertical support. you hold the other end so that the rope is horizontal and has a tension of 4 n. if you move the end of the rope back and forth, you produce a transverse wave in the rope with a wave speed of 2 m/s. if you double the amount of tension you exert on the rope, what is the wave speed? a. 2.8 m/s
b. 1.0 m/s
c. 2.0 m/s
d. 0.25 m/s
e. 4.0 m/s

Speed, v = 2.82 m/s

Explanation:

It is given that,

Mass per unit length of the rope,

Tension, T = 4 N

Wave speed, v = 2 m/s

Let v' is the speed of the wave when there is tension is doubled. The wave speed is given by :

If tension is doubled, means, T = 8 N

v = 2.82 m/s

So, if the tension is doubled, the wave speed 2.8 m/s. Hence, this is the required solution.

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.