So f=mg=GmM/r^2
Then say the mass of Earth is 2. Planet x is 8 times of the earth, so then 16.
Earth has gravity 9.8 and planet x has gravity 19.6.
Then the equation is really this: g=m/r^2
So Earth is square root ( 2/9.8)=0.45
planet x is square root (16/19.6) = 0.903
Oh, okay yeah...
Homework Statement
Planet X has a mass 8 times that of Earth and the acceleration due to gravity at its surface is 19.6 m/s2. The radius of the planet x compared to Earth is:
The answer is 2times bigger
Homework Equations
Fg = gm1m2 / r^2
The Attempt at a Solution
Is Earth's...
Homework Statement three objects carrying charges of (a)-4x10^-6 C, (B)-6x10^-6 C, and (c)+9x10^-6 C are placed in a line equally spaced from left to right by a distance of 0.5m. calculate the magnitude and direction of the net force acting on each.
Homework Equations
Force of the magnitude...
Homework Statement
there is a virus that infects a baterium. the viral genome was a 5000base long rna strand and it contained 4 genes for attacking the bacterium and reproducing. this rna strand was placed in a test tube with free nucleotides to allow it to reproduce. thus after many repeated...
Homework Statement
the frequency of the dark form (dominant) of mice is =.15 and the light form has 10% more mortality rate than the dark form mice. find the frequency of p and q for the next generation
Homework Equations
i am stuck here because i don't know the original number or i...
no!so that means in the end you were supposed to add both of the times and that is your final answer? cause this question was on my test i stopped at the kinematic equation.
wait. sorry i got wrong number from the calculator but the equation is right.right?
and also so are you saying that i had to use the temperature. and find thae speed of the time and add it with the time i got from the kinematic equation or just what i did was the end?
Homework Statement
a man dropped a stone into a can that is 120m deep. if the temperature of the air is 20degree celsius. how long would it take for a man to hear the sound when the stone hit the can?
Homework Equations
d=Vi*t + 1/2*a*t^2
The Attempt at a Solution
since i know that...