Which of the following principles of classical physics is violated in the Bohr model? (select all that apply) Opposite charges attract with a force inversely proportional to the square of the distance between them. The force on an object is equal to its mass times its acceleration. Accelerating charges radiate energy Particles always have a well-defined position and momentum

In 1977 the planet Alderaan, with a mass of 3 x 1024 kg, exploded. Assuming it was initially at rest and experienced no external interactions, 3. A) If the planet blew apart into two pieces with 40% of its mass flying away in one piece at 4,000 km/s, what speed did the rest of the planet have relative to its original frame? B) If the planet blew apart into three pieces, with 30% of its mass flying away at 3,000 km/s, and 20% of its mass flying away at 5,000 km/s at an angle of 120° relative to the velocity direction of the first fragment, what velocity did the rest of the planet have? Report the direction by specifying its angle relative to the velocity direction of the first fragment.

I Review I Constants I Periodic Table The position of a 55 g oscillating mass is given by T (t) = (1.7 cm) cos 13t, where t is in Part C seconds. Determine the spring constant. Express your answer in newtons per meter. Hνα ΑΣφ ? k = N/m Submit Request Answer Part D Determine the maximum speed. Express your answer in meters per second. Iνα ΑΣφ Umax = m/s Submit Request Answer

Two protons experience a head-on collision moving with velocity v. In order for there to be enough energy to create a new proton- antiproton pair, the velocity of each proton must equal? A) 2c B) 0.866c .914c D) 1.414c