Recent content by hardygirl989

Homework Statement Consider a 10 kg projectile launched with an initial speed of 100 m/s at an angle of 35 degrees elevation. The Resistance force is R=-bv where b=10 kg/s. A) Use a numerical method to determine the horizontal and vertical positions of the projectile as a function of time...

Homework Statement A small piece of Styrofoam packing material is dropped from a height of 2.00 m above the ground. Until it reaches terminal speed, the magnitude of its acceleration is given by a = -g + bv. After falling 0.500 m, the Styrofoam effectively reaches terminal speed, and then...

The phase shift for the cosθ would be ∏ ∴ x(t)=0.035cos(7t+∏) Thank you! SOLVED.

Homework Statement A 1.00-kg glider attached to a spring with a force constant 49.0 N/m oscillates on a frictionless, horizontal air track. At t = 0, the glider is released from rest at x = -3.50 cm (that is, the spring is compressed by 3.50 cm). Find the position, velocity, and...

1e41 was correct! Thank you so much for your help! =D SOLVED.

That makes sense. The website says only one thing about scientific notation on their formatting page: Incorrect format: 1.2E15 Correct Format: 1.2e15 I tried typing in e41 and it told me that it cannot understand what I wrote. I understand that you probably are not able to access...

Homework Statement Studies of the relationship of the Sun to our galaxy—the Milky Way—have revealed that the Sun is located near the outer edge of the galactic disc, about 30 000 ly (1 ly = 9.46 1015 m) from the center. The Sun has an orbital speed of approximately 250 km/s around the...

How do I mark this thread as solved?

Oh! I see now. ωy = (1/4 revolutions in 5 years)(4/3)^(3/2) ωy = (1/4)(4/3)^(3/2) = 0.385 rev This is the correct answer! Thank you! :)

I noticed that I forgot to post the image http://www.webassign.net/serpse8/13-p-020.gif You are right about the W^3 thing. It should be W^2, but I have it written that way on my paper...sorry. The R should be cubed tho because you multiply by the other R. So I think in 5 yrs it goes 1/4 of a...

If I divide by 360, I get 2√3/45, but this would make the number in revolutions per year then. How do I get the number into just revolutions?

Homework Statement Two planets X and Y travel counterclockwise in circular orbits about a star as shown in the figure below. The radii of their orbits are in the ratio 4:3. At one moment, they are aligned as shown in figure (a), making a straight line with the star. During the next five...

Homework Statement Three objects of equal mass (m) are located at three corners of a square of edge length , as shown in the figure below. Find the magnitude and direction of the gravitational field at the fourth corner due to these objects. (Use any variable or symbol stated above along...

thank you! I got the right answer now. :)

I recalculated the area to get 38 cm^2 instead of 38.8cm^2, but I am still confused on what the x value should be...why is it not 3.5, which is half of 7, be the correct value. 7 is the length of the second rectangle for (d4-d2) and d3? What should the value of X be then?