1 a) Question 1 part a (first part of question 1) Consider a simple pendulum with known mass m and unknown length I and charge q. Assume that you can measure time, but charge, cannot. You want to find an expression for q by measuring periods for the cases where electric field E switched off (To) and on (TE). For this purpose, a) Electric field is off. Consider you have measured To, i.e. you know its numerical value. Find I in terms of To and g. I' +q

Consider a rod of length L carrying a charge of q distributed uniformly over its length. Where applicable, let V(r→∞)=0. What is the voltage V at point P (at distance a away from the near end of the rod) due to the charge over the length of the rod? Express your answer in terms of given parameters (L,q,a) and physical constants (ke, ε0). Use underscore ("_") for subscripts and spell out Greek letters. Calculate the electric field at point P by differentiating V with respect to a. Let positive sign of E indicate direction of electric field pointing away from the rod.

When the charges in the rod are in equilibrium, which point, a or b, has an excess of positive charge? and what is the direction of the electrical field in the rod?

Solve the following problems. identify the given, the unknown, give the formula to be used, show the solution, and express the final answer into 2 decimal places. You can use a separate sheet of paper in solving the problem. 1. Find the current along a circuit if the voltage is 110 V with a resistance of 22 Ohms. and Given. Unknown: and Unknown: 3. Calculate for the voltage supplied to a load if the current is 2.5 A and the resistance is 10.80 Ohms. and Given: Unknown: Solution: Performance Task Formula: Solution: Final Answer: 2. What is the resistance of a bulb with a current of 0.72 A that is connected to a 110 V supply. Given: Formula: Solution: Final Answer: Formula: Final Answer:

Please solve and answer the question correctly please. Also be sure to give the correct units. Thank you!!

Please fill out the template with the work for this problem. Note that you need to have a picture, a list of knowns and unknowns, the general equation/s you will use, and the math steps to solve for the unknown, Only plug in the numbers after you have solved for the unknown, and the answer with units included. Problem 1:   A negative charge of q = -8.3 × 10-17C and m = 1.2 × 10-26 kg enters a magnetic field B = 1.3 T with initial velocity v = 410 m/s, as shown in the figure. The magnetic field points into the screen. Calculate the magnitude of the magnetic force F on the charge, in newtons.

B1

Problem #6 You want to buy a lamp, and the store has only lamps of a nominal power of 150 watts. When you were ready to pick up a lamp, you observed that there were two piles one pile were incandescent lamps and the other LED lamps. You remember that in class we discussed about efficacy. Immediately, you find in your phone the following table Flux [lumen] 250 450 800 1100 1600 Power Power Power Power Power [Watt] [Watt] [Watt] [Watt] [Watt] Then you can answer the following questions: Incandescent 25 40 60 75 100 Halogen 18 29 43 53 72 1) incandescent lamp? CFL 6. 10 13 18 23 What is the illuminance flux of the LED 4 5 10 15 20 2) What is the illuminance flux of the LED Efficacy [lumen/watt] Incandescent Halogen Efficacy lamp? Average 3) Explain which one you will buy and the 10.0 11.3 13.3 14.7 16.0 13.1 13.9 15.5 18.6 20.8 22.2 18.2 reasons for your selection CFL 41.7 45.0 61.5 61.1 69.6 55.8 LED 62.5 90.0 80.0 73.3 80.0 77.2

Quantitative Analysis - Introducing Elasti For each of the following situations: a. Choose an initial and final state (states A and B) that will be appropriate (interesting) for analysis. b. If there is not already a physical diagram of the situation and there should be one for proper analysis, include one. c. Construct a system schema of the situation. Do not forget to include the system boundary for the system specified by the problem. Choose your system wisely. d. Construct an energy bar chart and system flow diagram (LOL plots) for each problem. e. You are allowed to add other energy storage modes. You do not have to use the energy storage modes that are printed in each LOL plot. f. Find the unknown value. 1. A toy car is pressed onto a small spring so that it compresses it 5 cm and is then released. The spring's stiffness constant is 400 N/m and the cart's mass is 250 g. How fast is the cart moving when it leaves the spring?

Given that R1 = 100 ohms, R2 = 250 ohms, R3 = 350 ohms, and R4 = 100 ohms, how would you find the following for the current pictured? I think I've gotten parts a and b, but I really need to be able to understand. I've never taken a physics class before. Thank you!