Answer:
T = 5,06 10³ s
Explanation:
For this exercise, let's use Newton's second law, where force is the force of gravitational attraction
F = m a
The acceleration is centripetal
a = v² / r
Let's replace
G m 
/ 
² = m v² /
G / = v²
The velocity module is constant, so we can use the equation of uniform motion
v = d / t
Where the distance is the length of the circle and in this case the time is called the period
d = 2π
We replace
(2π / T)² = G /
T² = 4π² ³ / G
T = √ 4π² ³ / G
Let's calculate
T = √ (4π² (6.37 10⁶)³ / 6.67 10⁻¹¹ 5.98 10²⁴)
T = √ (255.83 10⁵) = √ (25.583 10⁶)
T = 5,05796 10³ s
Absolute dating and relative dating are both used commonly to determine the age of fossils. Absolute dating gives the exact date and chronological order to which the fossil lived. They do this by looking at the surrounding ground and using the carbon to find out how old it is. Relative dating is pretty similar to this except it uses carbon dating which is a way of finding the approximate age of the fossil. They do this by looking at the layers of the earth and making an assumption as to how old it is.
<span>The correct answer is B. The law of conservation of mass states that the mass of an isolated system is neither created nor destroy by chemical reaction or physical transformation. This means that the mass of subtances in an isolated system remains constant, it can not decrease and it can not increase.</span>
Answer:
a) 12.74 V
b) Two pairs of diode will work only half of the cycle
c) 8.11 V
d) 8.11 mA
Explanation:
The voltage after the transformer is relationated with the transformer relationshinp:
the peak voltage before the bridge rectifier is given by:
The diodes drop 0.7v, when we use a bridge rectifier only two diodes are working when the signal is positive and the other two when it's negative, so the peak voltage of the load is:
As we said before only two diodes will work at a time, because the signal is half positive and half negative,so two of them will work only half of the cycle.
The averague voltage on a full wave rectifier is given by:
Using Ohm's law:
