Quantum Mechanics Answers

calculate the de Broglie wavelength of an electron moving with a speed of C/137

A photon of wavelength 4 angstrom an electron at rest and this photon is deflected at an angle of 1500 to its original direction. Determine the wavelength of this photon after the collision

calculate A photon of infrared radiation whose wavelength is 1064 nm .

An object placed at the height of 10 metres from the surface of earth has a gravitational potential energy of 2100 J. What is the mass of the object? Gravitational acceleration is 10 m/s2

I uploaded the pdf here im kindly waiting.... https://drive.google.com/file/d/1labL377fG0EtWBVcXf_Vlo8AStpV0aY0/view?usp=sharing

2.5kg of water is heated in an open container for 5 minutes using a heater of power 2KW. Which of the following statements about the temperature of the water is true?(the SHC of water= 4200Jkg^-1k^-1)

A. The change in temperature of the water is 58.3⁰C

B. The change in temperature of the water is 57.3⁰C

C. The change in temperature of the water is greater 57.3⁰C

D.If the initial temperature of the water was 23.7⁰C then its final temperature would be 810⁰C