The table indicates that nitrogen and oxygen are the main components of the atmosphere by volume. Together these two gases make
up approximately 99% of the dry atmosphere. Why are these gases important?
A) They are essential to life on Earth.
B) They have a great influence on climate.
C) They absorb ultraviolet radiation from the sun.
D) They increased over time causing global warming.
A) They are essential to life on Earth.
B) They have a great influence on climate.
C) They absorb ultraviolet radiation from the sun.
D) They increased over time causing global warming.
2 answers:
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For item#1 , see attached picture, there is a voltage source, a resistor and wire (where current flow).
For item#2, we use the formula V=IR where "V" is for the voltage, "I" is for the current and "R" for the resistance
Solving for I:
I = v/r
I = 45volts/15k ohms
I=3 mA
For item#3, power is P=VI
p = 45volts * 3ma
P = 0.135 Watts
For item#2, we use the formula V=IR where "V" is for the voltage, "I" is for the current and "R" for the resistance
Solving for I:
I = v/r
I = 45volts/15k ohms
I=3 mA
For item#3, power is P=VI
p = 45volts * 3ma
P = 0.135 Watts