El planeta Urano completa un periodo de traslación solar en 83,75 años; su radio es de 25.559 km y su masa se calcula en 8,7. 10^25 kg. CALCULAR:
a) distancia al sol
b) fuerza de atracción gravitatoria con la que el sol lo mantiene en órbita
c) gravedad en su superficie
d) el peso de una persona que en la tierra pesa 80 kg.
e) la velocidad a la que se debería poner en órbita una sonda a 25.000 km de altura sobre su superficie.

AYUD

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)

Find the steady-state temperature at the center of the plate = /2, = /2) for sums of w from n=1 to n=19 (only odd values). find the value of n for which the change in /2, /2) is less than 1% from the value at the previous n. at this point, we consider the solution converged. does the value of the temperature at the center seem reasonable? in this part, the values of x and y are constant scalar values. you should produce a plot of the value of n on the horizontal and the estimate of the temperature at the center of the plate on the vertical. b. using the value of n (or larger) that resulted in convergence in part (a), create a contourf plot of the temperature distribution across the entire plate. use enough spatial subdivisions to create a useful plot. comment on the results. hint: you need to determine what “x” and “y” values to use to make your t matrix. i recommend using a different number of x and y values. use enough x and y values so that the plot is “smooth”.

How can a cyclist's acceleration change even if its velocity remains constant?