Advanced Higher Physics Astrophysics Quiz

Who was the first to suggest that the Earth was just another planet, centered only within the lunar sphere?

• Claudius Ptolemy

• Nicolaus Copernicus

• Tycho Brahe

• Johannes Kepler

What is the value of the Universal Gravitational Constant (G)?

• 6.67 x 10^-11 N m^2 kg^-2

• 9.8 m s^-2

• 3.84 x 10^8 m

• 2.36 x 10^6 s

What is the force experienced per unit mass in a gravitational field called?

• Gravitational potential energy

• Gravitational field strength

• Escape velocity

• Gravitational redshift

What causes the variation of 'g' with height above the Earth's surface?

• Rotation of the Earth

• Density of the Earth

• Shape of the Earth

• Mass of the Earth

What is the maximum value of 'g' at sea level?

• 9.832 m s^-2

• 9.780 m s^-2

• 9.81 m s^-2

• 9.82 m s^-2

What is the formula for the period of a satellite in circular orbit?

• T = 2πr / GM

• T = 2πr / (GM)^2

• T = 2πr / (GM)^3

• T = 2πr / (GM)^4

What is the kinetic energy of a satellite in a gravitational field?

• E_K = GMm / r

• E_K = GMm^2 / r

• E_K = GMm / (2r)

• E_K = GMm^2 / (2r)

What is the gravitational potential energy of a satellite in a gravitational field?

• E_P = GMm / r

• E_P = GMm^2 / r

• E_P = GMm / (2r)

• E_P = GMm^2 / (2r)

What is the total energy of a satellite in a gravitational field?

• E_total = GMm / r

• E_total = GMm^2 / r

• E_total = GMm / (2r)

• E_total = GMm^2 / (2r)

What is the escape velocity for a mass escaping to infinity from a point in a gravitational field?

• v_e = 2GM / r

• v_e = 3GM / r

• v_e = 4GM / r

• v_e = 5GM / r