The weight of an astronaut on the surface of planet Z, due only to its gravitational pull, is equal to 389 N. If moved to a distance equal to 10 × 1,86 4 mi above the surface of the planet, the value of the weight is changed to 24.31 N . What is the mass of planet Z if the mass of the astronaut is equal to 75.0 kg ? ( G = 6.67 × 10 -11 N ∙ m 2 / kg 2 )

In a system, when potential energy decreases, then entropy also decreases. true false

An electron and a proton are held on an x axis, with the electron at x = + 1.000 m and the proton at x = - 1.000 m. part a how much work is required to bring an additional electron from infinity to the origin? express your answer with the appropriate units. part b if, instead of the second electron coming in from infinity, it is initially at x = + 20.00 m on the axis and is given an initial velocity of 100.0 m/s toward the origin, does it reach the origin? part c how close to the origin does it come?

Question 1 of 10multiple choice: select the best answer and click "submit."what method of forecasting predicts the arrival time of a storm based on itscurrent speed and other starting variableso a. climatology methodo b. trends methodo c. analog methodod. persistence method