Physics

Find the components of this vector

Can you show me how you solve this? A vector has a magnitude of 3.5m and points in a direction that is 140 degrees counterclockwise from the X axis. Find the X components of this vector.-the counter

What is the velocity of a projectile at a given height.

The derivation I have in my book is : At a height h, v(x) =u cos θ And v(y) = sqrt(u^2 sin^2θ - 2gh) thereforeResultant Velocity v = sqrt(v(x) + v(y))= sqrt((u cosθ)^2 + u^2 sin^2θ - 2gh)= sqrt(u^2

Physics Problem Question

Here it is: A small mailbag is released from a helicopter that is descending steadily at 1.50 m/s. After 2.00 s, (a) what is the speed of the mailbag, and how far is it below the helicopter? (c) What

Physics Acceleration Problem

A speeding car is traveling at 92.0 km/hr toward a police car at rest, facing the same direction as the speeding car.If the police car begins accelerating when the speeding car is 250.0 m behind the p

De Broglie wavelength

Through what potential difference must an electron be accelerated from rest to have a de Broglie wavelength of 600 nm?-λ = h/(m * v) ----> m * v = p = √(2m * KE) = √(2m * e * V) --> λ = h/(√(2m * e *

I'm the center of the universe, prove me wrong

And... GO!-You are a retard. Retards are never at the center of universe.-There is no main stream theory in astronomy or cosmology, and if there was, it would only be a theory. and to your small insig

Propagation of light

Generally speaking what were to happen if say we were looking at a person on a planet 1 light year away with super bad *** telescope in your backyard.As you are looking at him he takes out a laser poi

Modern physics question

The electron interference pattern of the figure was made by shooting electrons with 50 {\rm keV} of kinetic energy through two slits spaced 1.0 {\rm \mu m} apart. The fringes were recorded on a detect

Electric fields and forces

An electron is initially moving to the right at 2.50 x 106 m/s. It enters a region of space where there is a constant electric field of magnitude 0.125 mN/C and directed upward. (a) In which direction

The Fundamental Forces - Question

Force and energy arent exactly the same thing, but they are closely related. Please explain how.-they differ by one power of distance: > (1 N) = (1 kg∙m/s²) > (1 J) = (1 N)(1 m) = (1 kg∙m²/s²) apply

Finding the centre of mass of an irregular shaped object

http://dev.physicslab.org/Document.aspx?doctype=3&filename=RotaryMotion_CenterMass.xml This is the site can anyone tells me why this works?i mean it states this 1.Another method of finding the cen

Significant Figures? Correct my answers

Write the answer using significant figures: 1. 33 x 22 --- I got 730 2. 45 x 16 --- 720 3. 7.5 x 1.---- 9.8 4. 48/16 --- 3.0 5. 54/19 --- 2.8 6. 293/61 --- 4.8 7. 77/6.2 ---- 12 8. 48/7 ---- 7 9. 1.5

Im looking to found the length of arc!!!

angle ABC=angle BCA=angle CAB radious of circle ABC=3. what is the length of arc AB? tnx!!-1/3 (pi D).-the circle is divided to 3 equal parts. what is the perimeter of the circle? r*pi that is 3*pi d

What's the name of this theory

I recently heard about a chemistry experiment where atoms were shot through a hole in wall. the first time the hole lined up with the launcher. The second time a second hole was added and the first wa

Another AP physics C multiple choice question

If v is velocity and t is time,A in: v=A * e^(-Bt) A. have dimmensions of L/T B. have dimmensions of (L^2)/T C. have dimmensions of L/(T^2) D. have dimmensions of (L^2)/(T^2) E. none of the above H