3 x 108 m/sec. 1.15 x 10-10 m 2.61 x 1018 1/s = ν Page 16 What is the speed of an electromagnetic wave that has a frequency of 7.8 x 106 Hz? practice problem 3. c = 3 x 108 m/sec.
Answer:
Current = 8696 A
Fraction of power lost = 
= 0.151
Explanation:
Electric power is given by
where I is the current and V is the voltage.
Using values from the question,
The power loss is given by
where R is the resistance of the wire. From the question, the wire has a resistance of 
per km. Since resistance is proportional to length, the resistance of the wire is
Hence,
The fraction lost = 
Answer:
not sure. I'll try answering this later
Explanation:
I'm not sure. I'll try answering this later
<span>4.7x10^-9 newtons
Since both the billiard ball and the bowling ball are uniform spheres, you can simplify the math by assuming that both are gravitational point sources centered within each sphere. And since the gravitational attraction increases as the bodies move closer together, you want to place them as close as possible to each other which would be touching. So when touching, the distance between the two point sources of gravity would be the sum of their radiuses.
0.15m + 0.028m = 0.178m
The formula for gravitational attraction is
F = G(m1m2)/(r^2)
G = 6.67x10^-11 m^3/(s^2 kg)
m1, m2 = masses
r = radius.
So substituting the known values gives
F = 6.67x10^-11 m^3/(s^2 kg) (7.2 kg * 0.31 kg) / (0.178 m^2)
F = 6.67x10^-11 m^3/(s^2 kg) (2.232 kg^2) / (0.031684 m^2)
F = 6.67x10^-11 m/(s^2) (2.232 kg) / (0.031684)
F = 6.67x10^-11 m/(s^2) 70.44565 kg
F = 4.69872x10^-9 kg m/s^2
F = 4.69872x10^-9 newtons
Since the number of significant figures provided is only 2, the result should be rounded to 2 significant digits giving a result of 4.7x10^-9 newtons</span>
Answer:
In Nanometer- 580 nanaometers
In Meter - 5.8 x 10^-7
