I think the missing word you're looking for here is 'unit'. The examples such as kilogram and gallons are all units of measurement. These are standard amounts used for mass, volume, and length. It is especially important to be consistent with this units especially when doing dimensional analysis.
Answer:,20,15.7
Explanation:
Frequency is defined as the number of revolutions made the object in unit time.
Given that it takes minutes revolutions.
So, revolutions can be completed in minute.
So, revolutions can be completed in a second.
So,frequency is
Period of a object is the inverse of frequency.
Inverse of frequency
So,period is .
Speed of car is the given by the ratio of distance covered in one revolution to the time period.
Distance travelled in one period is where is the diameter.
Given that
So,distance travelled in one revolution
Time period is .
Speed is
Power = exactly (current) times (voltage)
Power = exactly (about 2 A) times (240 volts)
Power = about 480 watts
25 km/h means that 15 kilometers will be 15/25ths of an hour. Therefore, 3/5 of an hour is 36 minutes, so it would take 36 minutes to fly that distance.
Answer:
Explanation:
We shall apply here Doppler's effect in optics . The formula is as follows
Δλ is change in wavelength , λ is original wavelength , v is velocity and c is velocity of light
Δλ = 685 - 590 = 95 nm
λ = 685
95 / 685 = v / 3 x 10⁸
v = .416 x 10⁸ m / s
= 4.16 x 10⁷ m /s