Answer:
B. The particles that make up material B have more mass than the
particles that make up material A.
Explanation:
Heat is technically the movement or more like vibration of the molecules. More thermal energy = more vibration
A car with a mass of 1500 kg. it is heavier
Answer:
If a pitch vibrates at 880 cycles, the octave below would vibrate at 440 cycles.
Explanation:
Pitch of sound is defined as relative highest and the lowest point of sound. The pitch is dependent on frequency of vibration.
Octave is defined as a tone which is formed due to merging of two different tone. The resultant tone is merged so well that it sound like a single tone.
Thus, Number cycle in octave =
Number cycle in octave =
Number cycle in octave = 440
Thus, If a pitch vibrates at 880 cycles, the octave below would vibrate at 440 cycles.
Answer:
(a)
(b) 142
(c)
(d) 96.8 mph
(e) 0.426 s
(f) 0.061 rad
Explanation:
Velocity is a time-derivative of position.
(a)
(b) Since is independent of , it follows it was constant throughout. Hence, at any point or time, the horizontal velocity is 142.
(c)
(d) When it passes the home plate, the ball has travelled 60.5 ft (from the question). This is horizontal, so it is equivalent to .
.
In this time, the vertical velocity, is
The speed of the ball at thus point is ft/s
To convert this to mph, we multiply the factor 3600/5280
(e) The time has been determined from (d) above.
(f) This angle is given by
(Note here we are considering the acute angle so we ignore the negative sign)
In radians, this is