You throw a rock horizontally off a cliff with a speed of 20 m/s. after two seconds, the magnitude of the velocity of the rock i
1 answer:
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Answer:
0.08 w
Explanation:
AVERAGE POWER : Average power is defined as the average work per unit time. average power is denoted by P its depend on the voltage current and power factor.
the expression for the average power is given as
P= cosΦ
We have given maximum voltage =8 volt
=
power factor =.25
resistance =25Ω
power factor =
power factor=
From here Z=100
P= ×
×cosΦ
=5.6577×0.05677×0.25
=0.08w
Answer:
acceleration will be tripled.
Explanation:
We know, when an object is performing Simple harmonic motion, the force
experience by it is directly proportional to its displacement from its mean position.
Also, F = ma , therefore, acceleration is also proportional to its displacement .
Now, F = kx
Therefore,
If we triple the displacement i.e, 3x.
Acceleration
Therefore, acceleration is also tripled.
Hence, this is the required solution.
Answer:
There are 2.71x10⁴ wavelengths between the source and the screen.
Explanation:
The number of wavelengths (N) can be calculated as follows:
Where:
: is the distance in glass = 2.25 mm
: is the distance in air = 1.50 cm - 0.225 cm = 1.275 cm
: is the wavelength in glass
: is the wavelength in air = 620 nm
To find the wavelength in glass we need to use the following equation:
Where:
: is the refraction index of glass = 1.80
: is the refraction index of air = 1
Hence, the number of wavelengths is:
Therefore, there are 2.71x10⁴ wavelengths between the source and the screen.
I hope it helps you!