Metric Conversions? Needed Help.? - solution level 19 electric box
The questions, if you can explain how the answers.
1. Light travels at a speed of 3000 x 10 ^ 10 cm / s. What is the speed of light in km / h?
2.A Cheetah has 112 kmh in a distance of 100 m. clocked What is the speed in m / s?
The electric motor 3.An Current 10.0 AMPS is passed through a solution of gold (III) for a duration of 0500 hours. After this time, how much gold plated on the cathode? There are 96,500 coulombs / mol electrons. One mole of gold has a mass of 197 g / mol. An amplifier is 1 coulcomb / second. It is necessary for the transfer of electrons 3.00 mol / mol of gold.
4. Joe found a nugget of gold, which had a density of 19.2 g / cm ^ 3. When dropped into water in a test tube, waterHeight of 15.0 mL. How many grams of gold, Joe?
If you're in trouble, so if you made some careless calculation errors, I apologize in advance. However, the logic on the circuit should be such that only the correct calculations yourself.
ReplyDelete1. Convert cm -> km:
1 cm = 1.0 x 10 ^ -3 km or (0.001)
3000 x 10 ^ (10-3) km / s = 3000 x 10 ^ 10 cm / s
Convert s -> H:
1h = 60 min = 3600s
[3000 x 10 ^ (10-3)] x 3600 km / h = 3000 x 10 ^ 10 cm / s
Answer: [3000 x 10 ^ 7] x 3600 kmh
2. Km Conversion -> M:
1km = 1000m
112 kmh = 112 x 1000 m / h
Convert h -> s:
1S = 1/3600h
112 kmh = 112 x 1000 / 3600 m / s
Answer: 112 x 1000 / 3600 m / s
3. Could you explain what a cathode? Sry, not really a person of science. \\ \\ \\ \\ \\ \\ \\ \\ U0026lt;br>
4. 1 ml = 1 cm ^ 3 (cm ^ 3 is used for solid and liquid ml)
The total mass of the nugget is 15.0 cm ^ 3 names (Have you forgotten the law, but it's true ...: D)
15 x 19.2 = 288 g
Answer: 288 g.