Thank you for your help! I'm not quite sure what you mean by introducing uncertainties. Also, the value I gave was in eV, but that's totally right for J/s!
Homework Statement
So today in class we did a lab where we calculated the stopping voltage of lights of different wavelengths. We did this experimentally. I have the wavelength, frequency, and stopping voltage of four different lights. I need to calculate the work function of the material, and...
Got it--so the KE of the v of Earth's period (to move it upward), plus my earlier work to put it in orbit. THANK YOU SO MUCH! You were so helpful and patient!
My teacher provides a way to find the period when I have the velocity, which I know from our earlier work! So for part c, should I substitute Earth's period, then find the new velocity, then find the new KE, and find the difference between the KE's?
I'm not sure how to show the gravitational force between Earth and the satellite--should I use mg?
Also, one of my friends told me just to calculate the PE of the satellite above Earth as PE=G([250 kg)(5.97 x 10^24)]/(4.0 x 10^6]), which gives a total of 24887437.5 J, which is a different...
Okay! I did:
PEi=G([(250 kg)(5.97 x 10^24 kg)]/[6378100 m])
PEf=G([(250 kg)(5.97 x 10^24 kg)]/[6378100 m + 4.0 x 10^6 m])
The difference between the two was 6007709504 J.
(5.97 x 10^24 kg is what I used as the mass of the earth, and 6378100 m is what I used as the radius of the earth).
Does that...
Homework Statement
I have a satellite with a mass of 250 kg, which I'm launching from Earth. This neglects air resistance/rotation of the planet etc.
a. How much energy is needed to put the satellite in orbit at an altitude of 4.0 x 106 m?
b. What would be the period of the satellite at that...