The tropical year, the time interval from one vernal equinox to the next vernal equinox, is the basis for our calendar. It contains 365.242 199 days. Find the number of seconds in a tropical year.

Calculate the following and express the answer in the proper number of significant figures: (5.245x0.03x9.0023)/(4.076x0.029x42.3)=

In the following calculations, be sure to express the answer in standard scientific notation with the appropriate number of significant figures. 6.477 × 10 m² 4.7036 x 102 m x 10

An astronomical unit (AU) is the average distance between the Earth and the Sun, approximately 1.50 × 10° km. The speed of light is about 3.00 x 10° m/s. Express the speed of light in astronomical units per minute. Number Units

Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume?

Estimate the number of steps you would have to take to walk a distance equal to the circumference of the Earth. (We estimate that the length of a step for an average person is about 18 inches, or roughly 0.5 m. The radius of the Earth is 6.38 x 106 m.) 105 steps 108 steps 1011 steps 1015 steps O 1020 steps

In 1999, NASA lost the Mars Climate Orbiter because one group of engineers used metric units in their calculations while another group used English units. Consequently, the orbiter descended too far into the Martian atmosphere and burned up. Suppose that the orbiter was to have established orbit at 157 km and that one group of engineers specified this distance as 1.57 x 10³ m. Suppose further that a second group of engineers programmed the orbiter to go to 1.57 x 10³ ft. The $125 million Mars Climate Orbiter was lost in the Martian atmosphere in 1999 because two groups of engineers failed to communicate with each other about What was the difference in kilometers between the two altitudes? Express your answer with the appropriate units. Value Submit HA Provide Feedback Part B Complete previous part(s) Units Request Answer ?

Hello, I am having trouble with this homework question. What would be the best approach in solving this problem and getting the answer in both scientific notation and as a whole number?   Unit Conversions (Metric < -- > United States customary) 1 mile = 5280 feet = 1.6 km1 lb = 0.454 kg = 16 oz1 liter = 33.8 oz1 gallon = 3.78 liter 7) How many ounces are in 6 pounds? e.g.      6 lb x 16 oz ^ 1 lb = _______ oz   8) Convert 23 miles to feet.___________________________________________ ft9) Convert 120 lbs to kilograms.____________________________________________ kg10) Convert 451 mL to ounces.____________________________________________ oz11) Convert 2.5 miles to km.____________________________________________ km12) Convert 2 days to seconds._________________________________________ s13) Convert 75 minutes to days._________________________________________ days14) Convert 1.8 gallon to ounces.____________________________________________ oz

I have tried 16.7x10^3, 16.7x10^4, and 1.365x10^8 and those are all wrong for the first part. I know that the second part is 14.3 hr. I need to know the km/s. Thank you!!

Given that 4.82803 kilometers (km) is approximately equal to 3 miles (mi):  Part A: Express the kilometer to mile ratio as a unit ratio. Round to 5 decimal places.