In the Bohr model of the Hydrogen atom , the radius of the orbit from the nucleus increases with decreasing the quantum number n. true or false?​

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.