No place in the river is characterized like this
Answer:
C) If an ice cube is placed into a boiling water, then it will melt in less than 2 minutes.
Explanation:
Answer:
16.45 m/s
Explanation:
Let y be the vertical distance and x be the horizontal distance
We are given that
The altitude of hang glider increasing at the rate=
The shadow of the glider moves along the ground at speed=
We have to find the magnitude of glider's velocity.
We know that
Magnitude of velocity=
Substitute the values
Hence, the magnitude of glider's velocity=16.45 m/s
Answer:
(a) the observed frequency is 200 Hz
(b) the observed frequency is 188 Hz.
Explanation:
speed of the truck, Vs = 27 m/s
frequency of the truck as it approaches, Fs = 185 Hz
(a) Apply Doppler effect to determine the frequency you will hear.
As the truck approaches you, the observed frequency will be higher than the source frequency because of decrease in distance.
Where;
Fo is the observed frequency which is the frequency you will hear.
V is speed of sound in air
(b) Apply the following formula for a moving observer and a moving source;
The observed frequency is negative since you are driving away from the truck and the source frequency is also negative since it is driving towards you.
Power = (voltage) x (current)
If the camcorder is USING 14 watts of electrical power right now, then . . .
14 watts = (2 volts) x (current)
Divide each side by (2 volts):
Current = (14 watts) / (2 volts)
Current = (14 V-A) / (2 V)
<em>Current = 7 Amperes</em>