Answer:
Explanation:
Since the sound bouncing back from car has greater frequency , the car must be moving towards the police car . If v be the velocity of car
f = 
f is apparent frequency , f₀ is original frequency , V is velocity of sound and v is velocity of car
1270 = 
1.02419 = 
348.22-1.02419v =340 +v
2.02419v = 8.22
v = 4.06 m /s
B)
In this case , we shall take relative velocity in place of velocity of car .So
v = 20+4.06
= 24.06 m /s
f =
= 
1240 x 
= 1428 Hz .
Answer:
Explanation:
Given
Acceleration a = 1.0m/s²
Displacement S = 1.0m
Required
Time t taken by the leaf to displace
Using the equation of motion
S = ut+1/2at²
Substitute
1.0 = 0+1/2(1)t²
1 = t²/2
Cross multiply
t² = 2
t = ±√2
t = 1.41secs
It takes the leaf to 1.41s to displace by 1m upward
-- The boiling points of the first group are all at temperatures
that are way lower than a comfortable room.
. . . . . Nitrogen . . . -320° F
. . . . . Helium . . . . -452° F
. . . . . Neon . . . . . -411° F
The freezing points of the second group are all at temperatures
that are way higher than a comfortable room.
. . . . . Lithium. . . . . . 357° F
. . . . . Sodium . . . . . 208° F
. . . . . Potassium . . . 146 °F
#16
If we put a resistor in circuit it will slow the speed of current
Let's check ohms law
- So if resistance is more current is less
#17
Again use ohms law
- Voltage must be increased
Answer:
Please find attached file for complete answer solution and explanation of same question.
Explanation:
