Pls help with J ASAP
...
Answers: 2
Mathematics, 21.06.2019 22:00
You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?
Answers: 3
Mathematics, 22.06.2019 00:00
Aspacecraft 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 vequalsminus0.0098tplusc ln upper 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 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
Answers: 3
Mathematics, 28.10.2019 05:31
Mathematics, 28.10.2019 05:31
Medicine, 28.10.2019 05:31
English, 28.10.2019 05:31
Mathematics, 28.10.2019 05:31
Biology, 28.10.2019 05:31
Mathematics, 28.10.2019 05:31
English, 28.10.2019 05:31
English, 28.10.2019 05:31
Mathematics, 28.10.2019 05:31