Special Theory of Relativity

A.7 Give a very brief description of two observational tests of general relativity. A.8 An inertial observer sees a particle moving at a speed 3c/5. It then is seen to decay into two photons. Draw an accurate spacetime diagram to illustrate the situation before and after the decay takes place. ...continues

Special relativity - past exam paper QB10 a) b)

i would be grateful if anyone could provide me with solutions to QB10 a) b) the attatched exam paper, to help with my revision.

Special relativity - past exam paper

i would be grateful if anyone could provide me with solutions to QB11 the attatched exam paper, to help with my revision.

I have no idea how to complete the following question from an assignment set

QUESTION 11 High sided trucks are very vulnerable to cross winds on freeways. Consider a truck with a total weight of 1.5 x 10to power of 5 Newtons, and a length 15m. width 2m, and with sides of height 8m. Assume the pressure exerted by wind at speed v, hitting a vertical surface normally is ρv², where ρ is the de ...continues

Thermodynamics

Steam expands in a turbine from 4 MPa and 500°C to 0.5 MPa and 250°C at a rate of 1740 kg/h. Heat is lost from the turbine at a rate of 12 kJ/s during the process. The power output of the turbine is: 222 KW 234 KW 438 KW 717 KW

Thermodynamics

Air at 15°C is compressed steadily and isothermally from 100 kPa to 700 kPa at a rate of 0.12 kg/s. The minimum power input to the compressor is: 1.0 kW 11.2 kW 25.8 kW 19.3 kW

Practice Q4: waves

This is a practice exam i recieved from the professor, and i was wondering if someone could kindly help me get the right answers so that i can double check mine with it? Also Please make sure to show all steps!

Statics -- Equilibrium

Please look at the attached problem 5-20: Determine the reactions at the points A and B of the frame. I know that the following must hold true: Sum(Moments(b)) = 0 Sum(Fx) = 0 Sum(Fy) = 0 No moment is indicated in the problem, so I'm not sure if that's needed. Your help is appreciated.

Magnitude of force the earth exerts on the moon

Using the mass of the earth and moon we try to find out the force that the earth exerts on the moon. The question is attached.

Heat problem

I need to know from what height you would have to drop a block of ice so that the energy obtained would be enough to melt the block and raise the temp of the water to 50 C.