Recent content by ryty

but I am not sure if its moving, and i don't know how to find out if it is

Homework Statement Two 1kg carts and a 500g weight are linked with cables. One of the carts sits on a 15° ramp, while the other is on a horizontal surface. See diagram. Find the tension in the cable linking the two carts. i attached the picture. Homework Equations im not sure, but i think...

Homework Statement Hearing the siren of an approaching fire truck, you pull over to the side of the road and stop. As the truck approaches, you hear a tone of 460 Hz; as the truck recedes, you hear a tone of 420 Hz. How much time will it take for the truck to get from your position to the fire...

So how do i find how many callers it takes to go from 90-120dB

Homework Statement In a pig-calling contest, a caller produces a sound with an intensity level of 90 dB. How many such callers would be required to reach the pain level of 120 dB? Homework Equations i don't know The Attempt at a Solution The way I understood it from my book, for...

This is what is says, The lowest note on a piano is A, four octaves below the A given in the table. The highest note on a piano is C, four octaves above middle C. Chromatic Musical Scale Note Frequency Middle C 261.7 C#(C-SHARP)...

Homework Statement Find the frequencies and wavelengths (in air) of these notes. A(440.0 Hz) C(523.3 Hz) the given frequencies are not the answers Homework Equations velocity=frequency*wavelength The Attempt at a Solution 343m/s=440Hz/wavelength wavelength=.780 m this isn't...

just for easier ways to put it Kf=a Uf=b Ki=c Ui=d it should look like this c= -b + d

i got 1.01 m/s, which is wrong 0 + G(6.67E-11*7.36E22)/21074000^2 = 1/2vi^2 + G(6.67E-11*7.36E22)/1737400^2

for radius, do i add in radius of the moon, or just use 370km as the radius?

what masses should i use?

i don't know, my homework is online, so i just type in an answer, and it ells me whether I am right or wrong, and it said i was wrong. So how would i compensate for the difference?

so it should look like this F=(6.67E-11)(.54)(.54)/.16 ?

im kind of confused, am i using the right equation?

okay, F=G(m1)(m2)/r^2 but if the raduis of the balls are .16 m, do i use that as the radius, or do i double it beause the balls are the same size?