The Earlybird communications satellite hovers over the same point on Earth's equator indefinitely. This is because _____. A. its orbital period is 24 hours B. it is beyond the main pull of gravity C. it pulls as hard on Earth as Earth pulls on it D. it is kept aloft by ground control E. forces other than Earth's gravity act on it
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on Earth's equator indefinitely because its orbit is continually adjusted
to ...
-- be in the plane of the equator,
-- be as perfectly circular as possible,
-- have a period exactly equal to the Earth's rotation period ...
about 23 hours 56 minutes 4 seconds, not 24 hours.
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resistance. The total amount of heat energy
produced by the heater in 60.0 seconds is
(1) 7.20 × 10^3 J (3) 8.64 × 10^4 J
(2) 5.76 × 10^4 J (4) 6.91 × 10^6 J
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Ohm's law :
V = IR
The amount of work done is
P = IV or P = I^2R (using Ohm's law to substitute)
Therefore,
P = 64*15
= 960W
So the total energy released is
Pt = 960*60
= 57600J
What is ohm's law ?
"Ohm's law states the relationship between electric current and potential difference. It states that the current that flows through most conductors is directly proportional to the voltage applied to it."
The strength of a direct current is directly proportional to the potential difference and inversely proportional to the resistance of the circuit.
What is work done?
Work done : W = (|F| cosθ) |d|
"Work done is defined as the multiplication of magnitude of displacement d and the component of the force that is in the direction of displacement."
Know more about ohms law here
#SPJ2
The amount of work done is P = IV or P = I^2R (using Ohm's law to substitute)
Therefore P = 64*15 = 960W
So the total energy released is Pt = 960*60 = 57600J
Answers
Permeability is the condition of being capable of having materials flow into and out of a membrane. The permeability of a cell membrane is determined by how easily a molecule can diffuse across the membrane. Usually, only molecules that are fat-soluble can permeate across a cell membrane. This is because the layer that is exposed on the linings of the cell membrane is nonpolar and can therefore allow the fat-soluble molecule to pass through.
Answer:Cell membranes are composed of a lipid bilayer.
Explanation:
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potental energy(PE) =0
kinetic energy(KE) = 0.5mv^2 = 0.5(1)(30^2) = 450
at the highest point the ball does not moved, v=0
potential energy at its maximum
kinetic energy = 0
Energy is conserved then
total energy before = after
PE1 + KE1 = PE2 + KE2
0 + 450 = PE2 + 0
conservation of energy is fun fact
g=10m/s^2 (assuming)
u=30m/s
height(h)=u^2/2g
=900/20=45m
P.E.=mgh
=1×10×45=450 joules
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That's not possible in a solid ... solids don't flow.
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U2 = 22 m/s
t1 = 0
t2 = 3 sec.
α=