MUST ANSWER EVERY PART

In each of the following situations, Emma is in the exact center of a glass-sided fright car speeding to the right at a very high speed v relative to you. For each question, explain your reasoning.

Emma has a flashlight in each hand and directs them at the front and rear ends of the freight car. She then switches the flashlights on at the same time.

In Emma�s frame of reference, which beam of light travels at a greater speed, the one directed toward the front or the one directed toward the rear of the train, or do they travel at the same speed?

In Emma�s frame of reference, which end, front or rear, is struck by light first, or are they struck at the same time? Which end is struck first in your frame of reference?

Calculate the final and initial mechanical energy for trials 1 through 6. Calculate the Diff %.

A block of mass m = 2.90 kg is pushed a distance d = 5.80 m along a frictionless horizontal table by a constant applied force of magnitude F = 16.0 N directed at an angle θ = 21.0° below the horizontal as shown in the figure below. (a) Determine the work done on the block by the applied force. J (b) Determine the work done on the block by the normal force exerted by the table. J (c) Determine the work done on the block by the force of gravity. J (d) Determine the work done by the net force on the block. J

Deserted on a deserted Island you spot a slightly exposed tin can under a tree. Upon opening it you find it’s instructions to a treasure. It reads: “Ten paces from this very tree in a direction twenty degrees south of west lies the first location. Ten paces from this very tree in a direction sixty degrees north of east lie the second location. Walk from this tree exactly the distance and direction you would walk from the first location to the second location and you will find ye treasure. Yar” (a) What are the coordinates of treasure? (b) Use a physical representation in conjunction with the Related Quantities sense-making technique to check the validity of your answer.

1. Consider three point charges at the corners of a triangle as shown in the figure, where q1=6.0x10-9 C , q3= 5.0x10-9 C, q2=-2.0x10-9 C, and the distance of separation are shown in the figure. Calculate the resultant force acting on q3. (Given: 60degree angle at q1 & q2, radius= 5 meters)

please explain. Thank you :)

Explain the following:

• How many lenses do human eyes have and what are they called? How do they work to show us objects both close and far away? (Remember that simple glass lenses only have one focal length, unlike our eyes.) What happens as we age?
• How do humans perceive color? Can our brains be fooled into thinking we see a color (let’s say yellow) when we are not actually looking at yellow light? (Hint: This relates to TV and computer screens.)

Discuss the eyes of other animals—let’s say cats, flies, and hummingbirds. What do these animals’ eyes do better than humans’? Why does the animal benefit from these different abilities? Does the animal lack visual abilities that humans have?

1. Which is true about the stopping potential V_stop?

2. What happens to the shift in wavelength of the x rays if we increase the mass of the target?

3.

If an electron moves into a region where it then has more potential energy, which is true?

Two charges q₁ = ?3.20 nC and q₂ = +8.31 nC are at a distance of 1.62

Derive the Maxwell equations for F (Helmholtz Free Energy) and G (Gibbs Free Energy) with “for all mathematical stages"? What is the condition of being a state function, and which of the parameters E (Internal energy), Q (Heat), W (Work), S (Entropy) are not the state function? Why is that?

Julia throws a 2.0kg rock at 11.0m/s from the ground at an angle of 50 degrees from horizontal toward a building. If the base of the building is 5.0m away from her, then what is the a) Kinetic Energy and b) Work done by gravity on the rock when it hits the wall?

Could you please explain ray tracing for mirrors, how do you know which way the traces go and why, I'm having trouble figuring out where the object is vs. the image. Thank you

An ambulance is traveling towards the scene of an accident at 40 m/s. Since this is a rather high speed the ambulance is blaring its siren that has a frequency of 325 Hz. The speed of sound is around 340 m/s

Part 1. Find the wavelength of the sound waves in front of the ambulance. Give your answer to 3 significant digits

m

Part 2. Due to the Doppler Effect what is the effective frequency of this sound to the listener f_L? Give your answer to 3 significant digits

Hz

Part 3. Use this new frequency and that the amplitude of the sound waves are 3.85 cm to find what the intensity of the sound wave is to an observer standing at the crash site when the ambulance is 1000 m away?

Give your answer to 3 significant digits

W/m²

Part 4. What is the intensity when the ambulance is parked 10 m away from the crash site? Give your answer to 3 significant digits

W/m²

Part 5. What is the intensity level for both? Give your answer to the nearest decibel

1000 m: dB

10 m: dB

1. When an inductor is connected to a 60.0 Hz source it has an inductive reactance of 54.4 Ω. Determine the maximum current in the inductor (in A) if it is connected to a 46.0 Hz source that produces a 120 V rms voltage.

An inductor (L = 360 mH), a capacitor (C = 4.43 µF), and a resistor (R = 460 Ω) are connected in series. A 50.0-Hz AC source produces a peak current of 250 mA in the circuit.

(a) Calculate the required peak voltage ΔV_max.

(b) Determine the phase angle by which the current leads or lags the applied voltage.

3. An AC voltage of the form Δv = 100 sin 1 000t, where Δv is in volts and t is in seconds, is applied to a series RLC circuit. Assume the resistance is 375 Ω, the capacitance is 4.50 µF, and the inductance is 0.500 H. Find the average power delivered to the circuit.

How is it possible for an atom to emit visible light even though the atom is smaller than the wavelength of visible light?

We all know that wavefunction collapse when it is observed. Uncertainty principle states that ?x?p??2. When wavefunction collapse, doesn't ?x become 0?, as we will know the location of the particle. Or does standard deviation just become smaller?

After collapse occurs, what happens to the particle? Does the particle resurrect into a wavefunction form?

What can be an observer that triggers wavefunction collapse? (electron wavefunction does not collapse when meeting with electrons; but some macroscopic objects seem to become observers....)

What happens to the energy of a particle/wave packet after the collapse?