A B C D 15. What is the power required to give a body of mass m a forward acceleration a when it is

kg m s -2 K -1 2. A student measures the p.d. across and current through a resistor as (6.25 ± 0.05) V and (202 ± 2) mA respectively. How should the student express the resistance(in ohms) of the resistor to the most appropriate precision? 30.94 ± 0.02 30.9 ± 0.6 31 ± 3 0.0309 ± 0.0005 3. Given the function Y = a 2 /(bc) , what is the consequential error in Y if there is an error of +2 % in a, +3 % in b and - 4% in c? -3 % 1 % 5 % 11 % 4. The graph below shows the variation of temperature with time t, for 1 kg of a substance. The substance is initially a solid, and is heated at a constant rate of 1000 W until all of it vaporizes. At any point, any vapor formed is allowed to escape freely out of the container.
The total amount renaissance hotel austin texas of energy to turn the substance from a solid at 0 o C to a liquid, and to raise the temperature of it to 90 o C requires approximately renaissance hotel austin texas as much energy to vaporize all of the substance at boiling temperature.
5. What thermodynamic temperature is equivalent to 323.45 o C? 50.70 K 50.71 K 596.60 K 596.61 K 6. A solid X is in thermal equilibrium with a solid Y, which is at the same temperature as a third solid Z. The three bodies renaissance hotel austin texas are of different materials renaissance hotel austin texas and masses. Which one of the following statements is correct? There is no net transfer of energy if X is placed in thermal contact with Z. It is not necessary that Y should be in thermal equilibrium with Z. X and Y have the same heat capacity. Y and Z have the same internal energy. 7. The velocity-time graphs represent the motion of a bus and a car, which started from the origin. At which times, A, B, C or D were the displacements renaissance hotel austin texas of the two objects equal?
A B C D 8. Three bombs are projected vertically upwards relative to a tank, which is traveling horizontally at a constant speed to the right. They are projected one by one at one-second intervals. Neglecting air resistance, which of the following diagrams correctly renaissance hotel austin texas shows the positions of the tank and the three bombs at a certain instant of the upward renaissance hotel austin texas flight?
A B C D 15. What is the power required to give a body of mass m a forward acceleration a when it is moving with velocity v up a frictionless track inclined at an angle to the horizontal? mavg sin mav sin + mgv
What is the minimum speed, in m s -1 of the bucket at the highest point of the circle so that the water does not spill out? 1.6 2.2 2.5 4.9 19. Two identical stars each of mass M are separated by distance d. They are rotating about their centre of mass in circular motion with a periodic renaissance hotel austin texas time T, given by T 2 = 2π 2 d 3 /(2GM 2 ) T 2 = 4π 2 d 3 /(GM 2 ) T 2 = 2π 2 d 3 /(GM)
20. A satellite moves in an elliptical orbit around the Earth, well above the atmosphere. At the point in its orbit nearest to the Earth's surface, the kinetic energy is maximum and the potential energy is minimum.
X is a heavy pendulum with the frequency f x of which can be varied. Y is a lighter pendulum of fixed frequency f y . As the frequency of oscillation of X is increased by shortening renaissance hotel austin texas the thread, the amplitude of the oscillation of Y changes. Which of the following graphs best represents the relationship renaissance hotel austin texas between the amplitude a y of the oscillation of Y and the frequency f x of X ?
A B C D 22. The smallest distance between two points of a progressive transverse wave which have a phase difference renaissance hotel austin texas of /3 rad is 0.050 m. If the frequency of the wave is 500 Hz, what is the speed of the wave?
What would be the speed and wavelength of the wave if the frequency is doubled renaissance hotel austin texas and other physical conditions renaissance hotel austin texas remain constant? speed is the same, wavelength is halved speed is the same, wavelength is doubled speed is doubled, wavelength is the same both speed and wavelength are doubled 24. A lamp emits light of two distinct wavelengths, x and y. When the lamp is used as a source for a diffraction grating experiment, it is found that the second order maximum for wavelength x occurs at precisely the same angle as the third order maximum for wavelength y. The ratio x to y is therefore 2 3/2 2/3 1/2
Qn 3 is an error question. renaissance hotel austin texas So each error is either + or -. Since Y = a^2/bc, the error of Y = 2xerror of a -(error of b+error renaissance hotel austin texas of c). If this question ask for consequential uncertainty of Y, then the maximum uncertainty is equal to the sum of all the uncertainties of a, b, c.
I think I got the answer to your qn. I downloaded the solution from our matrix2 and post it in this page. Please download and check soln to qn 4. It is a choice of A or B. The equation renaissance hotel austin texas to plot is v = (u^2 2gs)^1/2. So you are finding the graph for v vs square root of u^2-2gs. The closest answer is A.
hiemrs poon can you please give us the question then show the answer and explanation. if u already do that plase tell me how to get there i really need to know if i am doing the right thing. thank you for these quizes they help a lot