Recent content by blue_lilly

Homework Statement I am studying for my physics final and I had some questions about the theories we learned in class.2. Relevant Theories Relativity States the speed of light is a constant (c= 3E8 m/s). This was found using the equation E=mc^2. Brownian Motion Established the atomic theory...

Homework Statement Consider a pretend atom for which the electrons can be in anyone of the following energy states: Label Energy A -1.400×10-18J B -8.000×10-19J C -5.000×10-19J D -3.000×10-19J Start by arranging the four levels on a graph, then answer the following questions...

1 meter is 1E9 nano-meters. 1 nano-meter is 1E-9 meters.

Thank you so much, that makes more sense! I caught the dividing error after I posted the question to the forum! C:

So Hz is frequency and frequency either be: 1) inverse of wavelength: (1/λ) and in this problem wavelength is measured in nm. So it could be (1/nm) 2) speed of light divided by wavelength: (c/λ) and c is measured in m/s and wavelength in nm. So it could be [(m*nm)/s] Joules is measured as...

So if I say the right is positive, then anytime a box is moving to the right-there would be a + sign and if it was moving to the left, a -sign. [+3.02 kg*m/s]+[0 kg*m/s] = [-.798 kg*m/s]+[+PAfterB] [(+3.02 kg*m/s)-(-.798 kg*m/s)] = +PAfterB +PAfterB = [(+3.02 kg*m/s)-(-.798 kg*m/s)]...

Where are you getting the 10% from? I was dividing by 100 because initially you start out with 100% of the material. Or am I incorrect with that idea?

Homework Statement A photon, a packet of electromagnetic radiation, carries both energy and momentum. Consider a photon with a wavelength of 428 nm in vacuum. A) What is the frequency of the photon? 7.01×1014 Hz CORRECT B) What is the energy of the photon? 4.64×10-19 J C) What is the momentum...

You are correct, I must have copied it down wrong. So then, I would take .00702 and divide by 100 to get the Percentage. .00702/100 = 7.0225E-5% This is correct, right?

Homework Statement Box A of mass 1.20 kg is sliding to the right across a frictionless table at a speed of 2.52 m/s. Box A collides with Box B which has a mass of 2.56 kg, and Box A bounces straight back to the left with a speed of 0.665 m/s. A) What is the momentum of Box A before the...

Homework Statement The practical limit to ages that can be determined by radiocarbon dating is about 41000-yr-old sample, what percentage of the original 6 12 C atoms remains? Homework Equations (N1/No)=e^-λt The Attempt at a Solution Variables: t = 41,000 yrs T1/2 of Carbon = 5730...

If only it really worked like that, we would saving a lot of money. C:

The correct answer is (5.38E6)mi. My calculations were correct, I just had my units of measurement wrong.

Homework Statement Suppose one gallon of gasoline produces 1.01×108 J of energy, and this energy is sufficient to operate a car for 18.2 miles. An aspirin tablet has a mass of 332 mg. If the aspirin could be converted completely into thermal energy, how many miles could the car go on a single...

Homework Statement Prescribing Eyeglasses - Hyperopia A)Suppose you have hyperopia (you are farsighted). You can clearly focus on very distant objects, but any object which is closer than 56.3 cm from your eyes will appear blurry unless you use glasses. The purpose of glasses would be to...