Recent content by randomss444

How do i get the correct units?

Homework Statement When a question asks you to find current (in mA) what does it mean? V = 2.5V R = 1.6kΩ Homework Equations The Attempt at a Solution What I did was 2.5V = I(1600 Ω) I = 0.0015625 A Is that correct?

Alright so that means that current is effected by temperature because in order to find current you need to know resistance and because resistance is effected by temperature. Correct?

Homework Statement Is current different at different temperatures, as it heats up to its working temperature? Homework Equations The Attempt at a Solution My answer would be no because current does not change. Is that correct?

Homework Statement Derive the exact relationship between φ and γ, compare it to your experimental results. Homework Equations Snells law, ni sin (θi) = nt sin (θr) The Attempt at a Solution I have know idea what to do. My experimental value was φ=25, γ=15 thanks

Okay the charge of the proton is 1.60x10^-19 C. What I am asking is what is the charge of an alpha particle. Do you have to multiple the charge by 2 because there are two protons? Or is the charge just 1.60x10^-19 C. Thanks

Homework Statement What is the charge of an alpha particle? Charge of electron = 2.50x10^-21 Homework Equations The Attempt at a Solution Would you have to multipy 2.50x10^-21 x 2 to get the charge?

Still counfused whether gravity is negative or positive? Everything else makes sense thanks.

Homework Statement A uniform electrical field can exert a force on a charged particle that effectively neutralizes the force of gravity on the particle causing it to be weightless. What is the strength of the electrical field for a proton? q = 2.45x10^-14 mass of proton = 10.21x10^-12 kg...

Homework Statement How do you find the volume of three dimensions. 2.52x4.57x5.61 Homework Equations The Attempt at a Solution All you have to do is multiply the three right So the answer would be 64.607004? Thanks

Homework Statement A 7kg plate with a radius of 1.4m is rotating at 63 rad/s around an axis perpendicular to its center. Another plate that is not rotating is dropped onto the first plate and their centers align. The second plate is 5kg, with a radius of .8m. What is the angular velocity of...

Homework Statement Not sure if this is the right section but How would you go about solving this equation? 0.51 = 1,800((v^2)/13)

Homework Statement What is the network done on the car during the time interval? Mass = 75,000kg Vi = 0 vf = 111.11m/s^2 t = 2.5s ∆x = 138.8875m Homework Equations W= F∆X ∆KE = (1/2)(m)(v)^2 W = ∆KE The Attempt at a Solution ∆KE = 1/2(75000kg)(111.11m/s)^2 ∆KE =...

The only one I can think of is gravity because it says to ignore air resistance. So what should my next step be then and how do you find average force exerted by something?

vi = initial velocity Okay so we got vf =50 vi=0 t =7.00s m=114.2857143 mg=1120n so we find acceleration by using vf=vi+at 50=0+7a a=7.142857143 so we can find ∑E= ma ∑E = (114.2857143)(7.142857143) ∑E = 816.3265307 Is that right? And would that be the final answer?