Does a car have antennae? what senses does it have
1 answer:
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Answer:
a)
b)
Explanation:
The gravitational force on the satellite is calculated with Newton's Gravitation Law:
Where is Earth's mass,
is the satellite mass,
is the distance between their centers, where
is the height of the satellite (from Earth's surface) and
is Earth's radius, and
is the gravitational constant.
a) With these values we then have:
b) And the fraction this force is of the satellite’s weight <em>W=mg</em> is:
Answer:
(a) = 0.22 W
(b) = 0.056 W
Explanation:
given information:
the mass of piano wire, m = 3.00 g = 0.003 kg
tension, F = 25 N
length, l = 80 cm = 0.8 m
frequency, f = 120 Hz
amplitude, A = 1.6 mm = 0.0016 m
(a) the average power carried by the wave,
=
(√μF)ω²A²
where,
ω = 2πf = 2π120 = 754
μ =
=
= 0.00375 kg/m
thus,
=
(√(0.00375)(25))(754)²(0.0016)²
= 0.22 W
(b) What happens to the average power if the wave amplitude is halved.
based on the equation above, we know that the average power is proportional to the square amplitude. therefore
=
= 0.056 W