1 1 1 + = 25 When object is at do, lens must create cm - 50 cm f an (virtual) image at -dnear. Two people who wear glasses are camping. One of them is nearsighted and the other is farsighted. Which person"s glasses will be useful in starting a fire with the sun"s rays? Two...
What is the magnitude of the skydiver"s acceleration when the upward force of air resistance has a magnitude that is equal to one-fourth of his weight? 4. [2pt] What is the tension T1 ? 5. [2pt] Two blocks m1 = 9.6 kg and m2 = 4.7 kg are connected by a homogeneous rope that has a mass...
What is the displacement amplitude smax and the intensity I (in dB) for such a sound in air of density 1.21 kg/m3, at a frequency of 1,000 Hz, and a speed of 343 m/s?
Interestingly, these radio transmitters oscillate out of phase with each other. (B) is one quarter cycle behind (A), (C) is one quarter cycle behind (B), and (D) is one quarter cycle behind (C). (Problem 6 continued) (a) Consider a point P on the +x-axis at x = +R, where R . Let I0 denote the...
So now tell me: is the mass of the (Earth-Moon) system equal, smaller than or greater then the sum of the masses of Earth plus Moon?
The first reaction is likely to be that they are equal: after all, if you load a 1 ton pickup with a half-ton lawn mower, the whole thing will have 1.5 tons, right?
If you made the effort to understand the simple equations used here, you will be able to actually understand the books which would otherwise just grace your coffee table. The reader must have noticed that so far I have been only dealing with rather old concepts - no mention has been yet made of...
(The mass of Mercury is 3.3 1023 kg and its radius is 2.4 106 m.) N (b)Calculate the magnitude of the gravitational force exerted by the human on Mercury. N (c) For comparison, calculate the approximate magnitude of the gravitational force of this human on a similar human who is standing 3...
1 1 1 1 1 1 = + HW13 Key 5.An object and its image are both 12.4 cm from a spherical mirror, and on the same side of the mirror. (a) Is the mirror concave or convex? (b) What is the mirror"s focal length? State your answer with the correct sign. HW13 Key 6.You look into a shaving...
8. Remembering that Z = R 2 + ( X L X C ) 2 , at what relative values of XC and XL will the total impedance Z be a minimum? On the graphs above, mark this point. Explain your reasoning here. Question 2-1: At the frequency you labeled, will the value of the peak current, Imax, in the circuit...
Ask a new Physics Question
Tips for asking Questions
- Provide any and all relevant background materials. Attach files if necessary to ensure your tutor has all necessary information to answer your question as completely as possible
- Set a compelling price: While our Tutors are eager to answer your questions, giving them a compelling price incentive speeds up the process by avoiding any unnecessary price negotiations
1. Can you show me step by step how to solve this problem?:
- The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
- (a) What is the average angular acceleration of the Earth?
- (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?
- A spherical balloon is made from a material whose mass is 3.00-kg. The thickness of the material is negligible compared to the 1.5-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305-degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19-kg/m^3. Find the absolute pressure of the helium gas