Answer:
Carbon is found in the atmosphere mostly as carbon dioxide.
Explanation:
Answer: The correct answer is "It has increased surface levels of ultraviolet light".
Explanation:
Ozone depletion: The ozone layer in the atmosphere protects the earth's surface from the exposure of the harmful radiation but due to the hole in the ozone layer, the harmful radiation is reaching our earth's surface.
The ultraviolet radiation is very harmful radiation. It can cause skin cancer and eye cataract.
When the ozone layer is hit by the ultraviolet radiation then ozone will break into oxygen molecule and oxygen atom. Oxygen atom is unstable then it will react with another oxygen molecule. In this way, the ozone layer is not damaged.
CFC (chloro fluoro carbon) is the pollutant which are responsible for the ozone depletion. Due to the depletion of the ozone layer, the surface levels of ultraviolet light has increased.
Answer:
Explanation:
The main equation to solve this is F = ma, where F is the force applied to the brakes with respect to its acceleration. We have the mass that we need, but we do not have the acceleration. That's the first thing we have to find. However, our velocity needs to be stated in m/s and right now it's in km/h. Converting that:
Now we're ready to find the acceleration:
where the top line there translates to the final velocity minus the initial velocity.
so the acceleration is -8.3 m/s/s
We can use that now in the force equation above:
F = 1200(-8.3) and
F = -1.0 × 10⁴ N (that's 10,000 N to the correct number of sig dig's; the negative sign means that the force is being applied in the direction opposite to that which the van is currently moving)
Answer:
a. the charge on the balloon is -1.602^-15 C
b. the charge on the hair is 1.602^-15 C
c. the force is -2.3*10^-16 N
Explanation:
a. 1 electron has charge of -1.602*10^-19 C
10,000 then has a charge of 10000*-1.602*10^-19 = -1.602^-15 C
b. The charge gained by the balloon is equal in measure but with the opposite sign to the change in the hair
c. From Coulomb's law the force is:
F = k*q1*q2/r²
where k = 9×10^9 N*m²/C², q1 and q2 are the charges, and r is the distance (in meters). Replacing with data:
F = 9×10^9*-1.602^-15*1.602^-15/0.01²
F = -2.3*10^-16 N
