Answer:
1. The lowest stratum of the atmosphere
troposphere
2. Most of the earth's ozone is located in the
stratosphere
3. Earth coldest temperature occur in the
mesosphere
Explanation:
Answer:
48 hours
Explanation:
Using the formula,
R/R' = 2ᵃ/ᵇ..................... Equation 1
Where R = Original amount, R' = Radioactive remain, a = Total time, b = half life.
Given: b = 24 hours,
Let: R = X, then R' = X/4.
Substitute into equation 1
X/(X/4) = 2ᵃ/²⁴
4 = 2ᵃ/²⁴
2² = 2ᵃ/²⁴
Equating the base and solving for a
2 = a/24
a = 24×2
a = 48 hours.
Hence the time = 48 hours
Answer:
The correct answer is oxygen and hydrogen
Answer:
Mars venus earth and Mercury are inner planets
Jupiter , Saturn , Uranus and Neptune are outer.
Answer:
a) distance = 15340 km
b) time = 3437 seconds
c) velocity = 2.16 km/h
Explanation:
a) If the plane's speed is 295 km/m and it takes 52 minutes to get to its destination, then we can calculate the distance travelled via the distance formula:
Distance = v * t
and since the time units are both the same in the quantities to multiply (km/minute and minutes travelled), then they cancel out and the distance results in Km:
Distance = 295 * 52 = 15340 km
b) For this problem we need to convert Hm (hectometers) into meters in order to be able to simplify the units appropriately when using the distance formula.
recall that 1 Hm - 100 meters, then 3265 Hm = 326500 m
Distance = v * t
326500 = 95 * t
solving for "t":
t = 326500 / 95
t = 3437 seconds
c) In this problem, we need to convert the distance from m to km, and the time from min into hours in order to give the answer in the requested units. We also use the distance formula we have been using so far,
936 m = 0.936 km
26 min = 26/60 h
Then the magnitude of the velocity becomes:
v = Distance / time = 0.936 / (26/60) ≈ 2.16 km/h
