Recent content by chroncile

Homework Statement Sketch to illustrate the device and the role of the electric field for - an electron gun Homework Equations N/A The Attempt at a Solution http://i.imgur.com/J8Diu.png

But I didn't even get the right answer in question 1.

Homework Statement 1.) How fast must a rocket leave the Earth’s surface to reach a maximum height of 895 km above the surface of the Earth (assume the rocket is simply going straight up)? The answer is 3920 m/s 2.) How fast must a rocket leave the Earth’s surface to reach an orbit with...

Homework Statement What force does Earth exert on a 80.0-kg astronaut at an altitude equivalent to 2.5 times Earth's radius? Homework Equations FG = (Gm1m2) / r2 Radius of Earth: 6370 km Mass of Earth: 5.97x1024 kg The Attempt at a Solution FG = (Gm1m2) / r2 FG = (G x MEarth x 80...

Homework Statement A proud homeowner is out mowing their lawn. If the force of friction on the mower is 50.0 N and it is accelerating forward at 0.15 m/s2, what is the magnitude of the applied force if the owner is pushing on the handle of the mower at an angle of 70 below the horizontal...

Homework Statement A skydiver's parachute has malfunctioned and she is falling at a constant speed of 20 m/s straight down. Fortunately there is an airbag directly below her. Unfortunately, it is not inflated. The switch to inflate the airbag is 30 m to the east of the airbag. If she can throw...

Homework Statement I am trying to draw a change in velocity vector connecting from V1 to -V0, but I can't seem to figure it out. How do I show you guys what my problem is? Homework Equations N / A The Attempt at a Solution Googled for help

I think it's aav = v / t

Homework Statement If a sailboat is heading East at 18 m/s and it makes a turn until it is heading 50oNof E at 16 m/s, and the turn takes 2.5 minutes, what is the average acceleration of the boat in m/s2 Homework Equations None The Attempt at a Solution I drew the vectors of 16...

I need help again, the equation I found was T = 1.12 * x^0.5 Do I write it as T = 1.12 * x^0.5 or T = 1.12 * sqrt0.5

Thank you so much :smile: ..Wait a minute "I know one thing - that I know no thing.". What?

A spring-mass system. The equation is T = km^0.5 where k is a constant. The value of k differs if the mass is in grams or kilograms. That's why I need to know what to put mass as so that I get the right answer.

Okay, that doesn't answer my question though; I was asking if it's necessary to convert the mass from (g) to (kg) for the data in the lab report.

Homework Statement I did an experiment of mass vs. period and I got the mass in (g)rams and the period in seconds. My question is, do I have to convert the mass from grams to kilograms? Homework Equations N / A The Attempt at a Solution N / A

Okay, I get it now, thanks :smile: