if sam traveled 5 miles in 30 minutes, what is hs speed in kilometers (km) per hour? given that 1 mile = 1609 meters

A cheetah's top speed is around 75.0 mph. How long would it take (in us) for a cheetah to run the length of a football field (100.0 yards)?

A plane flies at a speed of 2.90 x 101 miles per hour.  What is this speed in meters per second?

The average speed of the International Space Station as it orbits the earth is 7710 m/s.  What is this speed in mi/hr?

Density = Mass /volume                63.7410g/                                                                   6.336 cm^3 is this right ?

The Hope diamond is the world's largest blue diamond ith a weight of 44.4 carats. A carat is defined as 2.00 x 10^2 mg. What is the mass of the Hope diamond in kilograms?

A sprinter set a high school record in track and field, running 200.0 m in 21.3 s. What is the average speed of the sprinter in kilometers per hour? Express your answer numerically in kilometers per hour.

The average person's step covers 2.5 feet. Some health experts recommend getting 10,000 steps a day. If you have an average stride (step length), how many miles would you walk if you walked 10,000 steps a day? (5280 ft = 1 mi). 1.3 x 10^8 miles 1.3 miles 4.7 miles 5.0 miles

Assume a certain adult requires 274 mL of pure oxygen per minute and assume inhaled air contains 20.0 percent oxygen by volume and exhaled air is 16.0 percent. (Also, assume that the volume of inhaled air is equal to that of the exhaled air.) If the person breathes 12.0 times every minute, what is the volume of air per breath? mL

If the radius of the sun is 7.001×105  km, what is the average density of the sun in units of grams per cubic centimeter? The volume of a sphere is (4/3)π r3.   The sun is a sphere with an estimated mass of 1.80×1030 kg.