A Level Physics A: Modelling Physics

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What is the unit of thermal power transferred away from the metal block in the given problem?

W (watts)

Which of the following is a scalar quantity?

energy, mass, power

What is the relationship between acceleration and displacement in a simple harmonic oscillator?

a = −25x

What is the specific heat capacity of the metal block in the given problem?

130 J kg−1 K−1 Signup and view all the answers

What is the unit of mass in the given problem?

kg (kilogram) Signup and view all the answers

What is the minimum time required to complete Section A of the paper?

30 minutes Signup and view all the answers

What is the shape of the graph in Fig. 17.3?

The shape of the graph is a curve that starts at a maximum value of g, decreases to zero at a certain distance r, and then becomes negative. Signup and view all the answers

What does the point where g = 0 represent in Fig. 17.3?

It represents the point where the gravitational field strength of the Earth and Mars are equal and opposite. Signup and view all the answers

What is the ratio of the mass of the Earth to the mass of Mars based on Fig. 17.3?

The ratio is approximately 9:1. Signup and view all the answers

What is the kinetic energy of the air incident at the turbine per second when the wind speed is 8.0 m s−1?

1.2 MJ s−1. Signup and view all the answers

What is the mass of the air incident at the turbine per second when the wind speed is 8.0 m s−1?

The mass per second can be calculated using the kinetic energy and the wind speed. Signup and view all the answers

What is the unit of the density of air t in the equation P = 1/3 tAv^2?

The unit of t is kg/m^3. Signup and view all the answers

What is the input power to the wind turbine when the wind speed is 8.0 m s−1?

1.2 MW Signup and view all the answers

What is the efficiency of each wind turbine in the wind farm?

42% Signup and view all the answers

What is the surface temperature of the Sun?

5800 K Signup and view all the answers

What is the wavelength of light emitted by Beta Pictoris at maximum intensity?

370 nm Signup and view all the answers

Derive an expression for the kinetic energy Ek of a particle in terms of its momentum p and mass m.

Ek = p² / 2m Signup and view all the answers

What is the displacement of the load at time t = 0?

s = 0 Signup and view all the answers

What is the shape of the graph of velocity v against time t for the load?

The graph is a straight line with a positive gradient. Signup and view all the answers

What is the relationship between the momentum p and kinetic energy Ek of a particle?