The fig above shows two waveforms X and Y. If the frequency of X is 30Hz what is the frequency of Y
12Hz
19Hz
60Hz
75Hz
Correct answer is D
No explanation has been provided for this answer.
\( 25^{\circ} \)
\( 40^{\circ} \)
\( 15^{\circ} \)
\( 55^{\circ} \)
\( 95^{\circ} \)
Correct answer is E
incident ray = XY
incidence angle i = 15\( ^{\circ} \)
rotation angle θ = 40º
angle that the reflected ray make with AY = i + 2θ
= 15 + [2 * 40] = 15 + 80 = 95º
62.6cm hg
72.5cm hg
79.5cm hg
85.9cm hg
Correct answer is D
No explanation has been provided for this answer.
Greatest in X
Greatest in Y
Greatest in Z
Same in each one
Correct answer is B
Gravity is always directed in a vertical fashion at X (i.e. 90 degrees which is where tension will be minimum).
The more horizontally aligned the cable is, the more it will pull horizontally. This increased horizontal pull will increase the tension in the cable.
graph 2 corresponds to the highest velocity
graph 1 corresponds to zero velocity
graph 3 corresponds to a particle moving in the negative x direction
graph 2 corresponds to a particle moving in the positive x direction
Correct answer is B
At constant velocity, an object must have a constant speed in a constant direction. Constant direction constrains the object to motion in a straight path thus, a constant velocity means motion in a straight line at a constant speed.