The de Broglie wavelength of a proton in a particle accelerator is 1.81 × 10-14 m. Determine the kinetic energy (in joules) of the proton.

Early test flights for the space shuttle used a "glider" (mass of 940 kg including pilot). After a horizontal launch at 460 km/h at a height of 4000 m , the glider eventually landed at a speed of 200 km/h

What would its landing speed have been in the absence of air resistance?

Express your answer using two significant figures.

What was the average force of air resistance exerted on it if it came in at a constant glide angle of 10 ∘ to the Earth's surface?

Express your answer using two significant figures.

According to Galileo in The Assayer, the “book” of the universe “cannot be understood unless one first learns to understand the language… in which it is written.” Drawing on examples from the text, explain how Galileo’s emphasis on the mathematization of nature distinguishes his conception of science from Bacon’s.

Select True or False for the following statements about electromagnetic waves.

Visible light is often emitted when valence electrons change their state.
Gamma rays can be produced in transitions of an atomic nucleus from one state to another.
Blue light has a longer wavelength than red.
X-rays are produced by a glowing light bulb.
The sun's radiation is most intense in the infrared region.
Ultraviolet radiation causes common sunburn.
A vertical automobile antenna is sensitive to electric fields polarized horizontally.

A car moving at a constant speed collides with a stationary truck at a light and the car bounces backwards as the truck moves forward. Derive the final velocity of the truck.

What happens microscopically when an electrical current starts to flow? I'd like to understand microscopically what happens in detail when electrons start moving (quasi-classically).

Electrons can have different velocity, they can produce electromagnetic fields, leads have free electrons and rigid atom cores and there exist electromagnetic fields. That's all the ingredients you should need?

Electrons only move due to EM fields, so basically this question boils down to what the EM fields look like and how they build up?! In steady state, what is the electric and magnetic field distribution in/around the lead? And what about the transient state?

What happens when you attack a battery to a lead? Are there EM fields between battery poles or why are electrons pushed? How do the EM field start to push electrons along an arbitraritly shaped long lead?

A typical American has a carbon footprint of 40-ish tonnes per year. If somehow, magically, all of that fossil-fuel consumption could be converted to nuclear fission energy, how much nuclear reactor fuel would you need to use? To perform this calculation, look up the energy you get for every carbon triple bond you use up (use that for the carbon mass-to- energy conversion, assming you release one carbon atom for every triple bond broken). You will also need to look up the fission energy per uranium atom, and the mass of the uranium atom, or equivalent.

That is, if an American converts 40 tonnes of carbon fossil-fuel usage per year over to uranium fission reactor nuclear energy, how much uranium would that person use per year? Give your answer in kg.

Now consider nuclear fusion: Look up the energy per atom and atomic mass for fusion reactions, in some ideal future in which fusion is awesome. How much fusion fuel would each American need each year? I prefer this answer in KG.

Why is it that not all bodies possess Elastic behavior? What is the origin of elasticity or plasticity? I mean, it's a physical property. So, how does it relate to atoms or molecules in different phases? (It should have some relation with atoms)

A diver springs upward from a board that is 2.70 m above the water. At the instant she contacts the water her speed is 11.7 m/s and her body makes an angle of 64.4 ° with respect to the horizontal surface of the water. Determine her initial velocity, both (a) magnitude and (b) direction.

An iron wire has a cross-sectional area of 5.90 ✕ 10⁻⁶ m². Carry out steps (a) through (e) to compute the drift speed of the conduction electrons in the wire.

(a) How many kilograms are there in 1 mole of iron?
_____________ kg/mol

(b) Starting with the density of iron and the result of part (a), compute the molar density of iron (the number of moles of iron per cubic meter).
___________mol/m³

(c) Calculate the number density of iron atoms using Avogadro's number.
__________ atoms/m³

(d) Obtain the number density of conduction electrons given that there are two conduction electrons per iron atom.
___________electrons/m³

(e) If the wire carries a current of 38.0 A, calculate the drift speed of conduction electrons.
___________ m/s

A star has strong molecular lines in its spectrum. What is its spectral class? O B A F G K M

What is its approximate temperature? ________ K

How can l write a lab report on the specific latent heat of ice?(electric method)

You cannot make the earth's magnetic field disappear, so while performing magnetic field mappings can the earth's field impact my results? if any at all?
In Mapping magnetic fields where are they the strongest and weakest?

1)The speed of light in a certain substance is 77.28-% of its value in crown glass. What is the index of refraction of that substance?

2)The speed of light in a certain substance is 81.7-% of its value in water. What is the index of refraction of that substance?

3)What is the speed of light in (km/s) in a material that has an index of refraction of 3.59?

At our distance from the Sun, the intensity of solar radiation is 1370 W/m^2. As discussed in class and in the textbook, the temperature of the Earth is affected by the greenhouse effect of the atmosphere. This phenomenon describes the effect of absorption of infrared radiation by the surface so as to make the surface temperature of the Earth higher than if it were airless. The average global surface temperature of the Earth is ~288 K. Calculate the surface temperature of the Earth if it did not have an atmosphere. You may assume an emissivity of 1. The radius of the Earth is 6370 km and its distance from the Sun is 1.496 × 10^11 m.