A capacitor C with plate separation d is charged with ±Q on the two plates. It is then connected (at time t = 0) to a resistor R and discharged.

a. What is the time dependence of the charge?

b. What is the power radiated at time t?

c. What is the total energy radiated away?

d. What fraction of the total energy is radiated away?

e. Suppose C = 1 nF,R = 1000 Ω, and d =0 .1 mm. What is the numerical value of the fraction of energy radiated.

Only d - e

What are the observations which cause astronomers to conclude that galaxies change over time.

A straight, vertical wire carries a current of 1.27 A downward in a region between the poles of a large superconducting electromagnet, where the magnetic field has a magnitude of B = 0.567 T and is horizontal.

Part A

What is the magnitude of the magnetic force on a section of the wire with a length of 1.00 cm that is in this uniform magnetic field, if the magnetic field direction is east? (Unit N)

Part B

What is the direction of the magnetic force on a section of the wire with a length of 1.00 that is in this uniform magnetic field, if the magnetic field direction is east?

How would you determine the number of proton-proton pairs, the number of neutron-neutron pairs, and the number of neutron-neutron pairs in an atom given its atomic number and mass number? Hence show that Carbon has 15 proton-proton pairs and 10 neutron-neutron pairs.

A 0.300-kg puck, initially at rest on a horizontal, frictionless surface, is struck by a 0.200-kg puck moving initially along the x axis with a speed of 2.00 m/s. After the collision, the 0.200- kg puck has a speed of 1.00 m/s at an angle of θ = 53.0° to the positive x axis. (a) Determine the velocity of the 0.300-kg puck after the collision. (b) Find the fraction of kinetic energy lost in the collision. (4 points)

Air density is sea level conditions (.002377 slugs/f^t3)

w(weight) of the SS Delphine + trailer + Redeye = 3,922,000 + 150,000 + 4451 Lbs

Crr = coefficient of rolling resistance = .015

Assume Combined CDA is 1555 ft^2

SAE J2807 (Davis Dam Grande Climb) - min speed is 40mpg (59 ft/s)

F(drag) = 1/2p x V^2 x C(d)A

F(rolling resistance) = W x cos x Crr

F(weight) = W x sin

F(sum) = F(drag) + F(rr) + F(weight)

P = F(sum)XV

convert to horsepower = P(1hp/550ft lbf/sec)

How many projections can the full spin have in the system containing 2, 3 and n electrons?
Which atoms have a nonzero angular momentum in the ground state?

1. Give a few reasons for studying physics.
2. Why must words be carefully defined for scientific use?
3. Why are simplified models used in scientific study if
they do not exactly match real conditions?

If the arm of a 118 lb female is held at a 45-degree angle from shoulder to hand, estimate the external forces and moments at the wrist, shoulder, and elbow joint for a bucket weighing 30 lbs held in the right hand. Use the anthropometric table to estimate segment lengths for a 75^th percentile female. ?

34.) 5. We perform a multi-slit experiment, using N = 6 slits. The wavelength of the light is lambda = 500nm and the distance of the screen from the slits is D = 15m.

a. Determine the distance of the slits, if the 3rd and 4th order diffraction fringes are 15mm away from each other.

b. How many major fringes are visible on the diffraction pattern if the coherence length of the light is δ= 2 micrometers?

c. How many minor fringes are between between each pair of major ones?

An 8.5 g ice cube at −10°C is put into a Thermos flask containing 150 cm³ of water at 30°C. By how much has the entropy of the cube-water system changed when equilibrium is reached? The specific heat of ice is 2220 J/kg · K. (The latent heat of fusion for ice is 333 kJ/kg and the specific heat of water is 4187 J/kg · K.)

Find the direction and magnitude of the net electrostatic force exerted on the point charge q2 in the figure.(Figure 1) Let q=+2.0μC and d=36cm. Express your answer using two significant figures. Fnet = N Previous AnswersRequest Answer Incorrect; Try Again; 4 attempts remaining Part B Express your answer using three significant figures. θ = nothing ∘ counterclockwise from q2-q3 direction Request Answer Provide Feedback q=+q q2=-2q q3=-3q q4=-4q please explain I am so confused

The element rubidium consists of two isotopes, the stable ⁸⁵Rb and radioactive ⁸⁷Rb (abundance 27.83%). What is the specific activity of natural rubidium chloride? Use Ar 85.47 gmol-1 for rubidium element, Ar 86.91 gmol-1 for ⁸⁷Rb, and Mr 120.92 gmol-1 for RbCl.

Correct answer is given, please explain why for each.

Concept Question 1 – A rock is thrown straight up from the surface of the earth. Ignoring air resistance, which of the following statements is correct as the rock moves upward? a) The total energy of the rock increases. b) Both the kinetic energy and the gravitational potential energy of the rock remain the same. c) Both the gravitational potential energy and the total energy of the rock increase. d) Both the kinetic energy and the total energy of the rock decrease. e) The kinetic energy of the rock decreases and the gravitational potential energy of the rock increases.

E is correct.

Concept Question 2 – A stationary bomb explodes in space breaking into several fragments. The net external force on the bomb at the time of the explosion is zero. Which statement is correct? a) The total kinetic energy is conserved. b) The sum of the kinetic energies of all the fragments is zero. c) The vector sum of the linear momenta of the fragments is zero. d) The velocity of any one fragment must be equal to the velocity of any other fragment. e) The speed of any one fragment must be equal to the speed of any other fragment.

C is correct

Concept Question 3 – Complete the statement: A collision is elastic if a) the total final momentum of the system is zero. b) the objects stick together. c) the final kinetic energy of the system is zero. d) the total kinetic energy of the system is conserved. e) the total momentum of the system is conserved.

D is correct.

1. Three resistors have values R₁= 47Ω, R₂ = 100Ω, and R₃ = 10 Ω. There is a 5V battery. The battery and three resistors are all connected in various circuits described below. Calculate the equivalent (or total) resistance, and any currents for each of the following configurations:

a. series circuit

b. parallel circuit

c. Series-parallel combination where R1 and R2 are in parallel and that combination is in series with R3.