Mathematics, 09.03.2021 06:20 kellimcollier8294
A spacecraft can attain a stable orbit 300 kilometers above Earth if it reaches a velocity of 7.7 kilometers per second. The formula for a rocket's
maximum velocity v in kilometers per second is v= -0.0098t + c In R, where t is the firing time in seconds, c is the velocity of the exhaust in
kilometers per second, and R is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. Find the velocity of a
spacecraft whose booster rocket has a mass ratio of 25, an exhaust velocity of 2.9 km/s, and a firing time of 20 s. Can the spacecraft achieve a
stable orbit 300 km above Earth?
Answers: 3
Mathematics, 21.06.2019 22:30
In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%
Answers: 1
A spacecraft can attain a stable orbit 300 kilometers above Earth if it reaches a velocity of 7.7 ki...
Mathematics, 31.07.2019 09:00
History, 31.07.2019 09:00
Mathematics, 31.07.2019 09:00
Social Studies, 31.07.2019 09:00
Biology, 31.07.2019 09:00
History, 31.07.2019 09:00
Social Studies, 31.07.2019 09:00
Mathematics, 31.07.2019 09:00
Mathematics, 31.07.2019 09:00
English, 31.07.2019 09:00