A. If an electron in a hydrogen atom has an energy of - 6.06 * 10^-20 J, which Bohr orbit is it in?

b. If an electron in a hydrogen atom has an energy of - 2.69 * 10^-20 J, which Bohr orbit is it in?

A ball is thrown horizontally at 20 m/s from the top of a cliff 50 meters high. how far from the base of the cliff does the ball strike the ground?

A 61kg astronaut (including spacesuit and equipment), is floating at rest a distance of 10 m from the spaceship when she runs out of oxygen and fuel to power her back to the spaceship. She removes her oxygen tank (3.

When is an object moving in uniform circular motion? A. when it speeds up around a curve B. when its tangential speed is constant C. when it has no net force acting on it D. when its acceleration is tangent to a circle

The drawing shows a light ray undergoing multiple reflections from a mirrored corridor. The walls of the corridor are either parallel or perpendicular to one another.

A 31.0 kg crate, initially at rest, slides down a ramp 2.6 m long and inclined at an angle of14.0° with the horizontal. Using the work-kinetic energy theorem and disregarding friction, find the velocity of the crate at the bottom of the ramp.

The Burj Khalifa in Dubai is the tallest building in the world at about 828 m. A daredevil climbs to the top of the building and sees the the Boulevard Plaza 2 (141 m tall) about 300 m away.

Suppose the initial position of an object is zero, the starting velocity is 3 m/s and the final velocity was 10 m/s. The object moves with constant acceleration. Which part of a velocity bs.

Identify which type of scientist would use spectroscopy for each purpose. Identification of the composition of the sun and stars: Determination of chemical bonds: Prediction of the efficiency of possible laser materials: Identification of harmful

The distance a wave moves from resting position

Which of the advantages to social media as a new media could also be viewed as a disadvantage