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 You have been asked to design a roller coaster track with a circular vertical loop in it. The loop is to have a radius of 10.0 m. How fast would the roller coaster have to be traveling so that at the bottom of the loop, the passengers will feel as if the seats are pressing...

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