Portland, Oregon, has an average of 240 cloudy days per year. Which heating system would be the least likely choice for this environment?

Light enters water from air at an angle of 25° with the normal, Θ1. If water has an index of refraction of 1.33, determine Θ2. A) 18.5° B) 34.2° C) 31.8° D) 71.5°

Wilam made a chart to summarize the results of experiments with the photoelectric effect. Which best describes how to correct Wilam's error?

Which object had more potential energy when it was lifted to a distance of 10 meters? Show your calculation. (Remember that gravity = 9.8 m/sec2)

The electron cloud model is a modern theory about the structure of atoms that explains many of the atom's behaviors.

If a car traveling 60 miles per hour turns east but keeps the same speed has it accelerated? explain

Velocity is: а - speed and direction. b - distance divided by time. c - always the same as speed. distance multiplied by time. d - distance multiplied by time

The gauge pressure in each of the four tires of an automobile is 230 kpa. if each tire has a "footprint" of 180 cm2 (area touching the ground), determine the mass of the car.

A bus travels 20 KM and 30 minutes what is average speed of the bus

What is the total number of atoms in the following formula? CaBr2

A lifeguard on a beach observes that waves have a speed of 7 m/s and a distance of 4.6m between wave crests. what is the period of the wave motion?