Multiple Choice pick 2 ! Physics ?
A wood burning stove sits in the family room of a house and there is a fire in the stove to help heat the room. Of those listed here, which mechanisms are primarily at work to heat the room. Pick the most important two of these. a. radiation b. convection c. conduction d. vaporization e. microwaves
Simple Physics Multiple Choice?
Would you feel any electrical effects if you were inside the charged sphere of a van de Graaff generator? Why or why not? 1. Yes; the electric field is very strong inside the van de Graff generator. 2. No; the inside of the generator has zero charge and thus no electric field. 3. None of these 4. Yes; the electric field exists both inside and outside of the generator. 5. No; although there are charges inside the generator, the net charge is zero. 6. More information is needed. Is it 1 or 5? I'm unsure whether there is charge within the sphere since whnenever you draw diagrams, the field lines never go into the object.
AP physics multiple choice?
collegeboard.com....click on teachers....click on ap..... all you have to do is register. awesome website for teachers, students, and parents! Hope that helps!
Physics Multiple Choice Please?
11.) 480 meters by d = VT 12.) 9.8 m/s^2 by constant acceleration 13.)0 m/s by the fact that it has to reach zero L/T for the object to come back down 14.)To solve this, let us first agree that Vxf = Vyi + AyT. Since we only know the initial velocity and the final velocity ( = 0) then we must rearrange this equation to solve for the time to reach this maximum height. So T = (Vyf - Vyi)/Ay = (-6)/(9.8) = blah. We plug this newly found time into the following formula: h = (1/2)AyT^2 = 1.8 meters. Congratulations. 15.) For this problem we invoke the formula for motion in the y-direction: Yf = Yi + VyiT - (1/2)AyT^2. We also know that the initial velocity is zero and we can make the origion at the point of release. So we arrive at a much cleaner formula. I present to you: h = (1/2)gT^2 = (1/2)(9.8)T^2 = 44.1 meters. (4.9)T^2 = 44.1 T^2 = 9 s^2 T = 3 seconds 16.)Same procedure except now we take it a step further. So we are just going to start at this formula: h = (1/2)gT² = (4.9)T² = 19.6 T² = 4 => T = 2 seconds Vyf = Vyi + AyT Vyf = (9.8)(2) = 19.6 m/s Good job 17.) This is essentially 2 problems. We first need to find the time it takes for the stone to reach its maximum height then we need to find the time it takes to drop from that height and hit the ground. So Vyi = 5 m/s, Vyf = 0 m/s. Yi = 0 m, Yf= ? T = (Vyf - Vyi)/Ay = (-5)/(-9.8) = .51 h = (1/2)AyT² ≈ (1/8)Ay ≈ (1/8)(9.8) = 1.225 So, now we know that the stone rises to a height of approx 1.23 meters. Now we start the other problem. h = 4.9T² = 1.23 T² ≈ 1/4 T = .5 seconds. So it takes 1 second for the stone to reach the ground. 18.) At first, it may seem obvious, but realize that a graph is a graph and can therefore be treated like one. So from that statement, we can move further by knowledge that Area = XY = Velocity*Time. Dimensionally analyzing this gives us Area = (m/s)(s) = m. Therefore the answer must be displacement. I hope I helped. Jared C. Palmer Radford University Physics
Physics multiple choice...photons?
Power = Energy / time The energy for individual photons is E = hf, where h is plank's constant and f is the frequency (green is low freq, red is higher freq) In one second, the amount of energy the photons must have is Energy = Power x Time = 1 Watt * 1 sec = 1 joule For multiple photons, the total energy is E = nhf We could actually calculate how many photons per second come from a 1 watt green or red laser using wavelength x frequency = speed of light. Red is around 650 nm, and green is around 550 nm in wavelength. But the point is the energy from the green laser must be 1 joule for the 1 second time interval, and the same must be true for the red laser. So n(red)*h*f(red) = n(green)*h*f(green) n(red) / n(green) = f(green) / f(red) Since the frequency of green is larger than the frequency of red light, the number of red photons is greater than the number of green photons. (B) edit... this explanation should point out that (a) and (c) are incorrect, and those of you who still cling to (d), the photoelectric effect has to do with photons causing electrons to escape a metal surface - that would be possibly true if it read "the number of ELECTRONS produced per second depends on the threshold frequency of the metal."
Do you know this physics multiple choice problem?
The centripetal acceleration vector points in which direction? A.) Always toward the center of the circle B.) Either toward or away from the center of the circle C.) In the direction of the motion of the object, around the circle D.) Direction must be calculated for each different circumstance
Multiple choice physics question? ?
A 6-kg object is moving south. A net force of 12 N north on it result in the object having an acceleration of: Choose one answer. A. 2 m/s2, south B. 18 m/s2, south C. 2 m/s2, north D. 6 m/s2, north E. 18 m/s2, north A 1000-kg elevator is rising and its speed is increasing at 3 m/s2. The tension in the elevator cable is: Choose one answer. A. 6800 N B. 3000 N C. 12800 N D. 1000 N E. 9800 N
One multiple choice physics question?!?
When a guitar string is struck, a standing wave is produced that oscillates with a large sustained amplitude, pushing back and forth against the surrounding air to generate sound How does the frequency of the resulting sound compare with the frequency of the standing wave in the string? 1. The frequencies of the resulting sound are half of those of the standing wave in the string. 2. The frequencies of the sound and the oscillating string are the same.
How many multiple choice questions are on the 2017 AP physics 1 test?
For general AP course information, you may want to visit the College Board’s AP student website at AP Students - AP Courses and Exams for Students - Explore AP.The College Board will generally put out exams from previous years on each AP course webpage, and the AP Physics 1 page can be found here: AP Physics 1: Algebra-Based. It’ll give you an overview of the exam, the types of questions found on it, what equations you need to know, etc.
Physics Multiple Choice Questions Help?
2) An MRI magnet in the form of a solenoid has 1000 windings per meter and carries a current of 1000 amperes. The magnitude of the magnetic field in the magnet is A) 1.65 Tesla B) 1.1 Tesla C) 2.1 Tesla D) 1.25 Tesla 3) The Solenoid is a cylinder with an area of 2 square meters and a alenth of 2 meters. The energy stored in the magnetic field of the solenoid is A) 2.56 x 10^6 Joules B) 4.7 x 10^8 Joules C) 6.6 x 10^7 Joules D) 0.9 x 10^8 Joules 4) a Consolidated Edison plant generates a billions watts of power at a voltage of 5000 volts. To reduce the loss of energy in transmitting the power over long distances by a factor of 100 Con Edison steps up the voltage with a transformer. The ratio of the number of windings in the secondary of the transformer to the number in the primary is A) 100 B)1000 C) 10 D) 10,000 5) The voltage at which power is transmitted is A) 10,000 V B)100,00V C) 50,000V D)30,000 V