Help please Question 4 Not yet answered The average velocity of the earth around

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Help please

Question 4 Not yet answered The average velocity of the earth around the Sun is Select one: Points out of 1 O b. 10.6 x 10 miles/hr O c. 4.72 km/s O d. 29.8 km/s Flag question Question S Not yet answered What is the simplified metric unit for the following expression, V /(2a), where v is velocity and a is acceleration? Points out of 1 Flag question Select one: O a. m/s O b. m/s C. S d. m Question 6 Not yet answered Which of the following arrangements of units are considered "mismatched units?" Select one: O a. (kilowatt)(hour) Points out of 1 b. meter/sec o c. (foot)(pound) O d. kilometer/sec Flag question

Explanation / Answer

1) d) 29.8 km/s

we know, radius of the earth orbit around the sun, r = 1.496*!0^11 m

average speed of the earth, v = distance travelled in year/one year

= 2*pi*r/T

= 2*pi*1.496*10^11/(365*24*60*60)

= 29806 m/s

= 29.8 km/s

2) d) m

because, units of v^2/(2*a) = (m/s)^2/(m/s^2)

= m

3) c. (foot)(pound)

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