2/5 = .4
.4*100= 40%
Alex spends more time
Answer:
tA=tB
tB=(sA-dA)/vA watch it below
Explanation:
the spatio for A is sA=vA*tA+dA
the spatio for B is sB=vB*tB
the meeting point will happen at: tA=tB
so, sA=vA*tB+dA
tB=sB/vB
yields:
sA=vA*(sB/vB)+dA
sA-dA=vA*(sB/vB)
sB=(sA-dA)*vB/vA
then
tB=((sA-dA)*vB/vA)/vB
tB=(sA-dA)/vA
Answer:
The ride is above 22m in height for 1.33 minutes.
Explanation:
Let's first find the height required above the boarding platform for the ride to be 22 m above the ground:
Height required = 22 - 5 = 17 m
We can now, using a right angled triangle of height equal to the Ferris wheel radius, calculate the angle from the vertical axis to achieve this height:
Height of triangle = 15 - (17 - 15) = 13 m
Hypotenuse of triangle = radius = 15 m
Angle from the vertical:
Cos( Angle ) = base / hypotenuse = 13 / 15
Angle = 29.92 °
Multiplying this angle by 2 we get the total angle through which the ride is at the required height:
Total Angle = 29.92 * 2 = 59.85 °
To take out the time we can now simply multiply the ratio of this angle /360 by the time taken for one complete revolution:
Time =
Time = 1.33 minutes
Answer: electromagnetic radiation
Explanation: range of wavelengths is called visible light or simply light. A typical human eye will respond to wavelengths.
Hydrogen .When acids touches all metal hydrogen gas is emitted .Strong acids is one that can produce a high concentration of hydrogen ions.Hope this helped!