Physics Questions and Answers

L1=50.
T1 = 30 + 273 = 303k
Linear expansivity =  1.9 x 10\(^{-5}\)

L2 = 50.29

Temp rise= ?

L2 - L1 = 50.29 - 50 = 0.29
Linear expansivity = \(\frac{L2-L1}{L1(T2-T1)}\)

1.9 x 10\(^{-5}\) = \(\frac{0.29}{50*(T2 - 303)}\)

1.9 x 10\(^{-5}\) * 50 (T2 - 303) = 0.29

T2 = \(\frac{0.29}{50 * 1.9 * 10^{-5}}\) + 303

T2 = 152.6 °C

All electromagnetic waves are:

• transverse waves; can travel through a vacuum ;
• travel at exactly the same speed in a vacuum, the speed of light, 300,000,000 m/s.
• transfer energy from one place to another;
• can be reflected;
• can be refracted .
• The oscillations of and are perpendicular to each other and are in the same phase.

\(\frac{10.5-0}{30-0}\) = \(\frac{c-0}{100-0}\)

\(\frac{10.5}{30}\) = \(\frac{c}{100}\)

cross multiply:

10.5 * 100 = 30c

35.0 ºC = c

speed of the sound wave = \(\frac{distance * 2}{time}\)

= \(\frac{408 * 2}{2.4}\)

: speed of the sound wave = 340 ms\(^{-1}\)

In physics, a transverse wave is a wave whose oscillations are perpendicular to the direction of the wave's advance.

This is in contrast to a longitudinal wave which travels in the direction of its oscillations. Water waves are an example of transverse wave.