What is the chemical formula for chalk

The illuminance on a surface is 3.5 lux, and the surface is 2 meters from the light source. What's the intensity of the source?

Calculate the kinetic energy of a 4kg cat running 5m/s

Which of the following is a likely outcome of a failed experiment? A. A scientist will give up and quit. B. A scientist will gain valuable information. C. A scientist will alter data to support their hypothesis. D.

The magnitude of the electrical force acting between a + 2.4 * 10-8 C charge and a + 1.8 * 10-6 C charge that are separated by 0.008 m is ___N, rounded to the tenths place.

Try at home mini-experiment. You will need 3 glasses-same size and shape. Fill one half-way with water, another almost full to the brim, and the other ¼ full with water. Order the glasses from least to greatest. Gently tap one glass with a spoon.

What is the circulatory system responsible for

How does the idea of rotating disk in the nebular model explain certain observed celestial phenomena?

The velocity of the transverse waves produced by an earthquake is 8.9 km/s, and that of the longitudinal waves is 5.1 km/s. A seismograph records the arrival of the transverse waves 68 s before the arrival of the longitudinal waves.

A 180-ohm resistor has 0.10 A of current in it. what is the potential difference across the resistor

Researchers at a university want to know if higher levels of nitrogen in fertilizer will increase the production of tomatoes per plant.