Which elements can form basic compounds? Check all that apply.

sulfur

rubidium

arsenic

selenium

silicon

xenon

antimon

Which imaging technique uses sound waves rather than electromagnetic waves? a. MRI b. X-ray imaging c. sonography d. CT scan

Give the formula for average velocity

Which object has the least momentum? object a: m = 1 kg, v = 100 m/s object b: m = 10 kg, v = 12 m/s object c: m = 0.5 kg, v = 1000 m/s object d: m = 100 kg, v = 2 m/s?

At an accident scene on a level road, investigators measure a car's skid mark to be 98 m long. It was a rainy day and the coefficient of friction was estimated to be 0.40.

In the circuit shown below, the battery voltage is 20 volts. What will be the reading of the ammeter shown in the circuit?

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is: