Explanation

A beta particle, also called beta ray or beta radiation (symbol β), is a high-energy, high-speed electrons emitted by the radioactive decay of an atomic nucleus during the process of beta decay.

Explanation

Reactors use uranium for nuclear fuel.

The uranium is processed into small ceramic pellets and stacked together into sealed metal tubes called fuel rods.

Explanation

The atmosphere is comprised of layers based on temperature. These layers are the

troposphere

stratosphere

mesosphere 

thermosphere

A further region at about 500 km above the Earth's surface is called the exosphere.

Explanation

Nitrogen is the chemical element with the symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

Symbol: N

Atomic number: 7

Boiling point: -195.8 °C

Explanation

• gasohol, that is a mixture of 90 percentage unleaded gasoline and 10 percentage ethanol (ethyl alcohol). Gasohol burns nicely in gasoline engines and is a perfect opportunity fuel for positive programs due to the renewability of ethanol, which can be made from grains, potatoes.
• a gasoline aggregate of 10% anhydrous ethanol and ninety% gas occasionally called gasohol, can be used within the inner combustion engines of maximum modern-day automobiles and light-duty motors without need for any change at the engine or fuel machine.
• E10 blends are generally rated as being 2 to a few octane numbers better than regular fuel and are authorized to be used in all new U.S. cars, and mandated in a few regions for emissions and different reasons.

Explanation

A Manometer is a device to measure pressures.

A common simple manometer consists of a U shaped tube of glass filled with some liquid. 

Explanation

light blue litmus paper turning red under acidic conditions 

Red litmus paper turns blue under basic or alkaline conditions.

Purple litmus paper is neutral.

At pH levels of 0.0 to 4.5, the solution turns a red color;

At pH levels of 8.3 to 14.0, it turns a blue color.

Explanation

Lead is a chemical element.

Symbol Pb  and atomic number 82.

It is a heavy metal that is denser than most common materials.

Explanation

The molecules in a solid are closely packed together and contain the least amount of kinetic energy. 

Explanation

Answer:

D

Fans help by replacing hot and humid air with cooler, dry air that allows for more evaporation. Cold air evaporates sweat and creates a wind-cooling effect that cools us without affecting room temperature.