Reference : Physics for Scientist and Engineers Chapter 21.

Two point charges q1 = 2 C and q2 = - 5 C are located in the (x,y) plane at coordinates (2,0) m and (-3,0) m respectively. Find:

a) The electric field created for both charges at points (0,0), (5,0) and (0,2)

b) the electric force on a point charge of -2.00 C placed at points (0,0), (5,0) and (0,2)

Have you ever ridden a free-fall ride at an amusement park, where the riders are suspended at a terrifying height and then plummet towards the ground in free fall? These rides use a Lenz’s law mechanism to slow the drop. Explain how Lenz’s law applies to this situation and why this mechanism is ideal for such an application.

Show that energy is conserved in a simple charging RC circuit. That is show that the total work done by the battery equals the final energy stored in the capacitor plus the energy dissipated in the resistor.

Proposition.

You and your friends are learning to play hockey, and you decide to use physics to get better by analyzing your movements. You are skating directly towards your friend at (5.98, 0) M/S who is also skating directly towards you to get the puck at a constant velocity of (-2.7, 0) M/S, and both of you reach the puck at the same time, so you collide and stick together. At the same time your hockey helmet with a mass of 5 kg goes flying away with a velocity of (0, 2.68) m/s. You have a mass of 74 Kg, your friend has a mass of 68 kg.

The questions:

1) In vector form, what is you and your friends velocity after you collide?

2) after the collision the puck is not moving on the ice and another player hits the puck towards the goal. If the average hockey player can apply a force of 80N over a 0.1s time and the goal is 15m away then provide evidence of whether or not the puck will reach the goal. the frictional force a puck experiences is 10N and the mass of a puck is .25kg. Consider friction in this case since the puck is made of a rough material.

Please show all work and explain why you are using the equations you are using !! Thank you so much. My physics teacher doesn't teach at all.

You have a wire of length L = 1.7 m for making a square coil of a dc motor. The current in the coil is I = 0.8 A, and the magnetic field of the motor has a magnitude of B = 0.31 T. Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two-turn square coil.

Electrons are initially traveling at 2.40×106 m/s in the horizontal direction. They enter a region between two charged plates of length 2.00 cm and experience an acceleration of 4.00×1014 m/s2 vertically upward. Find: (a) the vertical position as they leave the region between the plates; (b) the angle at which they emerge from between the plates

A nozzle with a radius of 0.16 cm is attached to a garden hose with a radius of 0.88 cm that is pointed straight up. The flow rate through hose and nozzle is 0.35 L/s.
Part (a) Calculate the maximum height to which water could be squirted with the hose if it emerges from the nozzle in m.

Part (b) Calculate the maximum height (in cm) to which water could be squirted with the hose if it emerges with the nozzle removed, assuming the same flow rate.

1. What direction does the light polarize when striking a
non-metallic surface?

2.  When unpolarized light falls on two crossed Polaroids, no light passes through. What happens if a third Polaroid, with axis at 45 to each of the other two, is placed between them?

1. Is electric charge a discrete or continuous quantity? Explain.
2. What fundamental particle is the most common “charge carrier” we run into in everyday life?

While driving fast around a sharp right turn, you find yourself pressing against the car door.

What is happening?

What is happening?

Which of the following point towards the center of the circle in uniform circular motion?

The Moon does not crash into the Earth because:

In the International Space Station which orbits Earth, astronauts experience apparent weightlessness because

In the International Space Station which orbits Earth, astronauts experience apparent weightlessness because

Question 1: In areas of enhanced heat flow, geothermal heating can be used to supply heating to homes, either by using ground water directly or by placing a water reservoir at depth. In Iceland, where the average temperature over the year is 4.6ºC, the geothermal flux can be as high as 300 mW m^-2.

1. If you wanted to be able to supply a home with indoor temperature at 25ºC and water at a temperature of 55ºC, how deep would your reservoir need to be? (1 mark)

2. Why might Iceland have such a high geothermal flux compared to other areas?

3. Does high geothermal flux accelerate the melting of ice sheets, why or why not?

A charge of -4 µ C is located at (x, y) = (0, 0) and a second charge of 2 µ C is located at x = 1. (a) Find a general expression for the electric field. (b) At what point, if any, will the electric field vanish?

Subject: Physics + Economics

Life Cycle Diagram:

1) Consider the provision of hot water using an electric water heater fueled by electricity produced from natural gas in a centralized powerplant. Draw a process flow diagram for this energy service with at least four stages in the supply chain. List at least four social or environmental impacts that result from process and identify where in your diagram the impacts occur.

2) List and describe three weakness of life cycle assessment for evaluating future energy systems, and suggest ONE solution for one of the weakness.

3) List & explain two separate factors that can lead to an energy source having a low Levelized Cost of Energy [LCOE] despite the high capital cost.