Answer the ALL the MCQs here. If you have a difficulty in answering here write the correct options and send in teams assignment page.
A graph of red shift against distance in metres was plotted for a range of nearby galaxies. The value of the gradient of the graph was 5.4×10–27 Which of the following expressions gives a value for the Hubble constant in s–1?
A helium nucleus approaches a gold nucleus. An electric force and a gravitational force act on each nucleus. Which statement about these forces is not correct?
A space shuttle of mass m is returning to Earth of mass M. The space shuttle falls from a height R above the Earth, where R is equal to the radius of the Earth. Which of the following gives the change in gravitational potential energy, ΔEgrav, of the space shuttle?
The suspension system of a car was tested by forcing the car into vertical oscillations. The forcing frequency was gradually increased and corresponding amplitudes of oscillation were measured. There was a maximum amplitude of oscillation A0 at a particular frequency f0. Which row of the table shows how A0 and f0 change as the damping in the suspension system is reduced?
A mixture of oxygen gas and nitrogen gas is kept at room temperature. Oxygen molecules are more massive than nitrogen molecules. Which of the following is correct?
A metal bar is heated, then allowed to cool. The wavelength λmax at which peak radiation emission occurs is determined.
Which of the following statements is correct?
A mass oscillates with simple harmonic motion with a frequency of 0.5Hz. The amplitude of the oscillation is 0.3m. Which of the following is an expression for the maximum velocity in ms−1 of the mass?
The Hertzsprung-Russell diagram below has an incomplete temperature scale.
Which row of the table gives possible values for X and Y?
A mass oscillates with simple harmonic motion with a frequency of 0.5Hz. The amplitude of the oscillation is 0.3m. Which of the following is an expression for the maximum velocity in ms−1 of the mass?
Boyle’s law states that, under certain conditions, the pressure exerted by a gas is inversely proportional to the volume occupied by the gas. Which of the following conditions is not necessary?
Which of the following does not have the base unit s–1?
The graph shows how the binding energy (B.E.) per nucleon varies with nucleon number A for low mass nuclei.
Which of the following is the energy required to split a He‑4 nucleus into 2 protons and 2 neutrons?
Polonium‑218 is a naturally occurring radioactive isotope with a half-life of 185 s. A sample of this isotope contains 2.75 × 1015 unstable nuclei. Which of the following expressions can be used to determine the activity in Bq of the sample?
A mass is hung from a spring and set into vertical oscillation. The mass is then changed so that the frequency of oscillation doubles. The amplitude of the oscillation is unchanged. Which of the following quantities is also doubled?
The gravitational field strength at the surface of the Earth is g. Another planet has the same density as the Earth, but twice the radius of the Earth. What is the gravitational field strength at the surface of this planet?
Which of the following describes a standard candle?
Canopus and Sirius are two stars. Radiation from Sirius has 3 times the intensity of radiation from Canopus. The distance of Canopus from Earth is 36 times the distance of Sirius from Earth. Canopus has a luminosity LC and Sirius has a luminosity LS. Which of the following is equal to the ratio LC/LS?
A radioactive source is placed a few centimetres away from a detector. When a sheet of paper is placed between the source and the detector there is no change in the count rate. When a lead sheet of thickness 0.5cm is placed between the source and the detector the count rate is reduced to the background rate. Which of the following is emitted by the source?
Q1 Astronomers often use the unit megaparsec (Mpc) for astronomical distances. In a textbook a value for the Hubble constant is given as 72kms–1Mpc–1.
(a) (i) Show that 72kms–1 Mpc–1 is equivalent to a Hubble constant of about 2.3 × 10–18 s–1. 1Mpc = 3.09 × 1022m
The pressure law states that, if certain conditions are met, the pressure exerted by an ideal gas is proportional to the temperature of the gas. Which of the following conditions is not correct?
A ‘seconds’ pendulum has a period of 2 seconds. Which of the following gives the length of the pendulum in metres?
During an earthquake, steel-framed buildings absorb energy because steel is
A mass-spring system is set into simple harmonic motion. Which graph shows the variation of the acceleration, a, of the mass with its displacement, x?
Scientists believe that our universe began with a big bang, and is presently expanding. The ultimate fate of the universe depends upon the total amount of matter in the universe. One possibility is a big crunch where the universe eventually contracts back into a point of infinite density. A universe with such a future would be described as being
Newton’s law of gravitation can be applied to the Earth-Moon system. Which of the following statements is not correct?
Some rocks contain lead as a result of radioactive decay. In one such decay a fixed amount of polonium decays to a stable isotope of lead. Which graph correctly shows the variation with time of the number of lead atoms, N, produced from the decay of polonium in the rock.
A mass is hung from a spring and set into vertical oscillation of amplitude x0. The total energy of oscillation is E0. Which of the following expressions gives the total energy of oscillation E when the amplitude has reduced to 1/2 x0?
Olympus Mons is the highest mountain on Mars. The height of Olympus Mons is 22 km, which is 0.6% of the radius of Mars. The change in gravitational field strength from the bottom to the top of Olympus Mons is
The diagram shows three light pendulums X, Y and Z being driven into oscillation by a heavy pendulum P. The time period of a pendulum increases with the pendulum length.
Which of the following statements is correct?
