When you draw an illustration for this problem, you would come up with the same drawing as shown in the picture. As the hot-air balloon travels upwards, there is a slight time when the bag of sand rises up until it reaches the maximum height. Then, it goes back down to the ground. The total time would be t₁ + t₂. The solution is as follows:
H = v₀²/2g = (2.45)²/2(9.81) = 0.306 m
t₁ = H/v₀ = 0.306 m/2.45 m/s = 0.125 s
t₂ = √2(H + 98.8)/g = √2(0.306+ 98.8)/9.81
t₂ = 4.495 s
Total time = 0.125 s + 4.495 s = 4.62 seconds
A nation's nominal GDP is $1.5 trillion with an inflation rate of 5%. ∴ Real GDP is 30 trillion.
<u>Explanation:</u>
Key Terms
GDP deflator: A measure of the level of prices of all new, domestically produced, final goods and services in an economy. It is calculated by computing the ratio of nominal GDP to the real measure of GDP.
real GDP: A macroeconomic measure of the value of the economy’s output adjusted for price changes (inflation or deflation).
nominal GDP: A macroeconomic measure of the value of the economy’s output that is not adjusted for inflation.
GDP deflator( inflation rate = 5% ) =
Inflation rate =
trillion
∴ Real GDP is 30 trillion.
Answer:
B.
Explanation:
If we need to show on the screen a sine wave of 1 Khz, this means that the period (time to complete one cycle), will be 1/f = 1 ms.
So, in order to show some cycles on the screen at the same time, it is reasonable to choose a 1ms/div setting for "Time/div" dial.
If we by mistake choose a much much shorter setting (like 1 μs/div), what we will look at the screen will be very different, as we will be looking at 1/1000 of a cycle per div, so we wil see a nearly horizontal line.
If instead we choose 100 ms/div, this means that each division will show 100 cycles of the sine wave, that they will look at if they were a lot of nearly vertical lines very closely spaced.
So, the statement B). is the one that is true.
F = ma
1500 = 1500a
a = 1 m/s²