Heat
Jonny has a 10g bottle of water at 42 degrees C, how much energy is required to be at -5 degrees C if the specific heat of water is 4.18 J/g*C and the specific heat of ice is 2.16 J/g*C; and the heat of fusion is 80?
-2663.6J
My motor at home generates 5J of energy when I put 15J in. My generator converts my 15J of energy into 10J of electrical energy. Which machine is more efficient?
Generator
What is the voltage of the battery if it is in parallel with three branches of resistors at 1 ohm, 2 ohms, 3 ohms, and the total current is 11 A?
Bob's photoelectric effect printer prints a page per every 200 waves over the thresh-hold frequency which is 50Hz. He shoots photons with wavelength 10m moving at 510m/s for 13 seconds into the printer. How many FULL pages does he print?
3 pages
What is our physics TA's full legal name?
Jason Zhao
A light bulb exerts 50J of heat when turned on in a 5 second interval in a simple series circuit with battery of 10V. How much power does the bulb use?
10W
A Neutonium metal with Atomic number = 35 and Atomic mass = 15 encounters some amount of alpha decay and beta decay. At the end, a pleutonium metal with Atomic number = 27 and Atomic mass = 12. How many alpha and beta decay's occured?
2 alpha, 1 beta
I have a jumble of protons and neutrons that weight 50 kg. Kushal decides to add 130 electrons to that, what is the new weight?
50kg
Find the wavelength of an open-closed standing wave of length 69m if it's fundamental frequency is 8Hz, and the ?th harmonic's frequency is 40Hz
55.2m
What word is difficult for our Physics TA to pronounce?
Sixth
What is the specific heat of the 0.08kg metal at 100C, if it is placed in 0.2kg of water at 21 C. The equilibrium temperature of water with the bar is 23.5C.
341.503J/kgC
Explain how ferromagnets work and their domains.
Ferromagnets have movable domains, meaning that they can be aligned and become magnetized.
I have two charged metal conducting spheres touching each other, which are both on top of insulated bases. I bring a positively charged metal pole to the side of one, then touch the other one while separating the balls. What will the charge of the remaining ball be?
-
A police car with their siren wailing at 500Hz is driving straight past you. As the car drives by, what happens to the pitch, frequency, and wavelength of the waves and explain why.
Pitch: Will decrease due to distance
Frequency: Will decrease due to the Doppler effect
Wavelength: Will increase due to the Doppler effect
Name at least 5 cards in Jason Zhao's Clash Royale deck
Bonus points: (100 per each correct card level, -100 per each wrong)
Hint: the total elixir cost of his entiree deck is 30
All his cards are at level 15: Knight, Goblin Giant, Sparky, E-wiz, Minions, Mini-Pekka, Rage, Zap
Sunlight warms up my skin, and then I blow the air off my skin into into another spot. I then touch the hot sand on the beach. Name three heat transfer's that occur in the scenario
Convection, Conduction, Radiation
I have an electron moving into the screen into a magnetic field pointing to the right. What will the force be on the electron?
Down
Two unknown charges have field lines drawn around them. By moving closer to the left charge, the kinetic energy increases. By moving away from the right charge, the potential energy increases. What is the sign(s) of the charges?
Both -
Bonus (200) points if you can explain all scenarios
It will traditionally bend away from the normal
Bonus: in the case of a critical angle, there will be no refracted ray
A certain element called TA has a half life of 200 seconds. If the experiment of TA starts with 800kg of material, how long will it take for TA to have 6.25kg of material?
1400 seconds
Find the latent heat fusion of a 5g metal with specific heat 1.8 as a solid and 2.7 as a liquid. During a certain experiment, a total of 1000J of heat energy is used to bring the metal from a (20C) solid to a liquid (100C). The metal is considered a solid from 20C->50C, and is a liquid from 50C->100C.
11 J/g
Daily Double: Wager Points
Name the units of at least 6 of these: As detailed as possible
Current, Voltage, Resistance, Charge, Power, Specific Heat Capacity, Frequency, Momentum
Current: Amperes = C/S
Voltage: Volts = J/C
Resistance: Ohm's = V/A
Charge: Coulombs
Power: Watts = J/S
Specific heat: C = J/kg*C or J/g*C
Frequency: Hertz = sec^-1
Momentum: kg*m/s
I have two charges, charge A which is left of charge B. Charge A has charge 7.3x10^-6 C while charge B has charge -4.1x10^-6C. If they are 1.7 meters apart, determine the magnitude and direction of the force that charge B exerts on charge A.
A experiences 0.932N of force to the right
I have two waves, one of amplitude 1A and the other of amplitude 1.5A. I have both waves oscillate from a single point, which amplitude below cannot result from the superposition of both waves?
2.5A, 1.33A, 0.5A, 0.33A, 2A, 1A, 1.5A
0.33A
What is our physic's TA's full phone number?
617-320-7647