True or False

The magnetic field at a radial distance R from a current element i dl is a maximum when the current element direction is at right angles to the radial line.

Induced electric field lines are continuous, i.e. having no beginning or ending points.

An arbitary shaped Amperian loop through which no currents pass may itself pass through a magnetic field.

Induced electric field lines have a beginning and end point.

The negative sign in Faraday's Law (Lenz's Law) implies that the induced EMF is in opposition to any changes in magentic flux.

The current induced in a copper wire coil by a changing magnetic field is dependent of the number of turns in the coil.

The negative sign in Faraday's Law (Lenz's Law) implies that the induced EMF is in opposition to any changes in magentic flux.

A motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 18.0m/s , and the distance between them is 54.0m. (A) How long does it take from the moment when the motorcycle starts to accelerate until it catches up with the car? In other words, find t2-t1. (B) How far does the motorcycle travel from the moment it starts to accelerate (at time t1) until it catches up with the car (at time t2)? Should you need to use an answer from a previous part, make sure you use the unrounded value

An old car battery that has an emf of e m f1 = 11.5 V and an internal resistance of 55.0 mΩ is connected to an R = 2.00 Ω resistor. In an attempt to recharge the battery, you connect a second battery that has an emf of e m f2 = 12.6 V and an internal resistance of 10.0 mΩ in parallel with the first battery and the resistor with a pair of jumper cables.

(a) Draw a diagram of the circuit.

(b) Find the current in each branch of the circuit. (Enter your answers from smallest to largest.)

(c) Find the power supplied by the second battery. Assume that the emfs and internal resistances of both batteries remain constant.

Discuss where that power is delivered. Assume that the emfs and internal resistances of both batteries remain constant.

During 0.24 s, a wheel rotates through an angle of 2.42 rad as a point on the periphery of the wheel moves with a constant speed of 2.48 m/s. What is the radius of the wheel?

A box of mass m=19.0 kg is pulled up a ramp that is inclined at an angle θ=15.0∘ angle with respect to the horizontal. The coefficient of kinetic friction between the box and the ramp is μk=0.295 , and the rope pulling the box is parallel to the ramp. If the box accelerates up the ramp at a rate of a=3.09 m/s2, calculate the tension FT in the rope. Use g=9.81 m/s2 for the acceleration due to gravity.

With the use of diagrams, explain why the slit width of a prism wavelength selector must be varied to provide constant effective bandwidths (specific wavelengths) but a constant slit width instead can be used to provide constant bandwidth with a grating monochromator?

calculate the frequency in hertz, the wave number in cm-1 Calculate the frequency in hertz, the wave number in cm!, the energy in joules, and the energy associated with the 317 nm wavelength energy source achieved from a He-Ne laser and used in the detection of Quinine (a chiral compound used to treat malaria and babesiosis).

A cart starts from rest at the top of a roller coaster that is 40 meters high. It descends down the first hill all the way to ground level before heading into a vertical circular loop with diameter 20 meters. What is the minimal H(height of the initial hill) needed in order for the cart to just barely make it over the top of the loop?

1. Describe the pendulum’s physical location when the position is zero? When it has the largest positive value?

2. Describe the pendulum’s physical location when the velocity is zero? When is has the largest positive value? Explain.

3. Relationship between length and period?

4. Relationship between amplitude and period?

Barium has a work function of 2.48 eV. What is the maximum kinetic energy of electrons if the metal is illuminated by UV light of wavelength 420 nm?
eV
What is their speed?
m/s

You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 17000 km and its rotation period to be 22.8 hours. You have previously determined that the planet orbits 240000000 km from its star with a period of 500 Earth days. Once on the surface you find that the free-fall acceleration is 11.8 m/s22. What is the mass of the planet? What is the mass of the star?

Sketch the wave-function of the ground state of a particle of mass m which is con- fined in one dimension within a square potential well of infinite height, centred at x = 0 and of width a between x = ?a/2 and x = a/2.

What type of function is that?

If the infinite potential well is replaced by a potential well of finite height, sketch the new ground state wave-function. Explain qualitatively how the ground state energy changes in going to the finite well.

A rocket is launched straight up. It contains two stages (Stage 1 and Stage 2) of solid rocket fuel that are designed to burn for 10.0 and 5.0 s, respectively, with no time interval between them. In Stage 1, the rocket fuel provides a net upward acceleration of 18 m/s2. In Stage 2, the net upward acceleration is 13 m/s2. Neglecting air resistance, calculate the maximum altitude above the surface of Earth of the payload and the time required for it to return back to the surface.

maximum altitude m

time required s

A 26 g ice cube at -15.0oC is placed in 204 g of water at 48.0oC. Find the final temperature of the system when equilibrium is reached. Ignore the heat capacity of the container and assume this is in a calorimeter, i.e. the system is thermally insulated from the surroundings. Give your answer in oC with 3 significant figures.

Specific heat of ice: 2.090 J/g K

Specific heat of water: 4.186 J/g K
Latent heat of fusion for water: 333 J/g

A speeding motorist zooms through a 50 km/h zone at 75 km/h (21 m/s) without noticing a stationary police car. The police officer immediatley heads after the speeder, accelerating at 2.5m/s^2. When the officer catches up to the speeder, how far down the raod are they, and how fast is the police car going?

I know you use the equations x= x_0+ v_0t+ .5at^2 and v= V_0 + at... But I want to know why we use these equations and also how does my book derive that when you set the 1st equation for the police officer and the speeding motorcycle equal it comes out to be

x_s= 2v_s0^2/a_p

THank you

Please read the article below (copy into your address bar, in case you dont undersatnd how internet works):

https://physicsinfootballgrade11bcss.weebly.com/energy-work-power.html

And provide a 250 word summary of the article and how it applies to the concepts of kinetic energy, work, and power. Also provide a description of how to figure kinetic energy, work, and power. If you can provide an additional resource. THIS HAS TO CONTAIN A SUMMARY OF THE ARTICLE AND BE RELATED TO THE ARTICLE OR I WILL NOT THUMBS UP!  If the 250 word summary meets all requirements I will thumbs up promptly.