Frequency = (speed) / (wavelength)
= (3 x 10⁸ m/s) / (300 m)
= 1 x 10⁶ per sec
= 1 mHz
This frequency is the " 1000 " or " 100 " that's marked
in the middle of your AM radio dial.
If there's an AM station in your city that broadcasts on 1000 kHz
and you tune your radio to it, you're picking up radio waves
that are 300 meters long. (about 0.19 of a mile)
Answer:
b)7.89 g
c) 7.91 g
d) 7.97 g
Explanation:
The accepted value for the measurement is 7.92 g, while the precision of the instrument is 0.05 g. Therefore, the interval of the accepted values will be the central value plus and minus the precision, so:
- Minimum accepted value: 7.92 g - 0.05 g = 7.87 g
- Maximum accepted value: 7.92 g + 0.05 g = 7.97 g
So, the accepted interval is
7.87 g - 7.97 g
Therefore, all the values that lie within this interval are accepted. So the accepted values are:
b)7.89 g
c) 7.91 g
d) 7.97 g
Answer:
Explanation:
As we know that the current through the battery is given as
here from above equation we know that current will become zero when time elapsed is very large
so here we can say that charge will flow through the battery from t = 0 to t = infinite
now we have
As we know that
Answer:
133.62 kmh.
Explanation:
Time provided = 3.25 hours.
Distance to be covered 300 km
Times spent in first 100 km = 1 hour
Time spent in next 43 km
= 43 / 40 = 1.075 hours
Total time spent = 2.075 hours
Total distance covered = 143 km
Distance remaining = 300 - 143
=157 km .
Time remaining = 3.25 - 2.075
= 1.175
Speed required = Distance remaining / time remaining
= 157 / 1.175
= 133.62 kmh.
The answer would be A. As the bat is swung, it gains kinetic energy. But once it hits the ball, it loses, or transfers, it’s kinetic energy to the ball.
