Sr-90 (A=90, Z = 38) decays via ^-decay. Calculate the energy of the antineutrino (in keV) if the beta particle has a kinetic energy of (4.00x10^2) keV.

Note - you can look the atomic masses up online or in the appendix of the textbook.

Assume all the energy released are shared by the kinetic energy of the beta particle and antineutrino.

A vertically polarized light passing through two polarizers. The polarization axis of the first polarizer is rotated (4.2000x10^1) from the vertical direction. The polarization axis of the 2nd polarizer is rotated (5.70x10^1) from the vertical direction. What is the ratio of the transmitted intensity over that of the incident light?

A converging lens has 11.2 cm focal length, and is placed 7.5 cm behind a diverging lens. Parallel light strikes the diverging lens. After passing through the converging lens, the light is again parallel. What is the focal length of the diverging lens in cm to 1 decimalpoint? (Hint: draw a ray diagram )

Photons of energy 7.0 eV are incident on a metal surface with a work function of 2.5 eV. What minimum potential (in volts) do you need to put on the metal to stop photoelectrons from escaping from the metal? Give your answer to 1 decimals.

Calculate the magnitude of the Coulomb force (in SI units) between 2 hydrogen ions, H⁺each with a charge of +e on them,at a distance of (8.1x10^0) nm. Use 2 sf in your calculation.

The magnetic flux through a single loop of wire changes from (9.200x10^0) to 0 Webers in (1.6x10^1) milliseconds. Calculate the magnitude of the emf induced in the loop in Volts to 2 sf.

A movie star catches a reporter shooting pictures of her at home. She claims the reporter was trespassing and to prove her point, she gives as evidence the film she seized. Her (1.7500x10^0) m height is (8.28x10^0) mm high on the film, and the focal length of the camera lens was 200.0 mm. How far away from the subject was the reporter standing? Give your answer to 3 sf.