A scientist has two radioactive substances. One emits beta particles, and the other emits alpha particles. He thinks that since the alpha particles are larger, they are more dangerous to humans. What is wrong with his reasoning?

How much heat must be absorbed by 125 g of ethanol to change its temperature from 21.5 oC to 34.8 oC?

The density of air under normal conditions is about 3 1.2 kg / m. For a wind speed of 10 m/s, find (a) the actual power carried in the wind; (b) the maximum power (Betz limit) extractable by a wind turbine with a blade area of 10 m2;

If the amplitude of the Waves coming from a light bulb decreased what would you expect to happen.

Classify each of the following mixtures as homogeneous or heterogeneous: a mixture of oil and water air cereal in milk a glass of tea

Mass is a measure of weight. True False

Archimedes' principle can be used to calculate the density of a fluid as well as that of a solid. suppose a chunk of iron with a mass of 390.0 g in air is found to have an apparent mass of 350.5 g when completely submerged in an unknown liquid.

6. What does the slope of a velocity-time graph indicate?

How high was a brick dropped from if if falls in 2.5 seconds?

what is not a type of model that is commonly used in science and uses familiar things to describe unfamiliar things?

A brake warning lamp on the dash remains on whenever the ignition is on. If the wire to the pressure differential switch (usually a part of a combination valve or built into the master cylinder) is unplugged, the dash lamp goes out.