Explanation

• A sphygmomanometer is a medical device used to measure blood pressure.
• It consists of an inflatable cuff and a pressure gauge.

Explanation

Sirius is the brightest star in the night sky.

Sirius means صبح کا ستارہ 

Explanation

• When light passes through a prism, refraction occurs, leading to the formation of a spectrum.
• Refraction is the bending of light as it passes through a medium with a different optical density.
• It causes the different wavelengths of light to separate and form a spectrum.

Explanation

• If an object absorbs all seven colors of light (i.e., all the wavelengths of visible light), it appears black.
• This is because no light is being reflected, and our eyes perceive the absence of light as black.
• When an object reflects all the component colors of light, it appears white.

Explanation

• A chemical formula tells us the number of atoms of each element in a compound.
• It contains the symbols of atoms of the elements present in the compound.
• As well as how many there are for each element, in the form of subscripts.

Explanation

• In a parallel circuit, if one bulb blows, the other bulb will remain the same.
• This is because each bulb in a parallel circuit has its own independent path to the power source.
• The failure of one bulb does not affect the current flowing through the other bulb's path.

Explanation

Refraction is the change in the direction of light when it passes from one medium to another.

It is one of the most commonly observed natural phenomena of light.

Optical prisms and lenses involve refraction to redirect light, and so does the eyes of living beings.

Explanation

The stomach is a J shaped sac about one foot in length that lies under the diaphragm on the left of the abdominal cavity.

The stomach has three parts:

1. The region where the stomach opens is known as the cardiac stomach.
2. The main body is known as fundus.
3. The posterior portion which opens to the intestine is known as the pyloric stomach.

Explanation

• When the air above the land is heated during the daytime, its density decreases.
• This is because warm air expands and becomes less dense than cold air.

Explanation

A fasting blood sugar level of 99 mg/dL or lower is normal, 100 to 125 mg/dL indicates you have prediabetes, and 126 mg/dL or higher indicates you have diabetes