Simply put, a torpedo is a self-propelled underwater missile that carries an explosive warhead to a target. Early torpedoes damaged their target by exploding as soon as they made contact. These torpedoes were called contact torpedoes. Newer torpedoes can detonate once in close proximity to a target. These proximity torpedoes do not even have to touch the ship to inflict… Read more →
The air we breathe is made up of significant quantities of four gases. When we breathe in the air, our bodies consume their oxygen and convert it to carbon dioxide. Exhaled air contains about 4.5-percent carbon dioxide. Our bodies do not do anything with nitrogen or argon. A Submarine is a sealed container that contains people and a limited supply… Read more →
An IQ test is an assessment that measures a range of cognitive abilities and provides a score that is intended to serve as a measure of an individual’s intellectual abilities and potential. IQ tests are among the most commonly administered psychological tests. In order to understand what these scores really mean, it is essential to look at exactly how these… Read more →
Color blindness occurs when you are unable to see colors in a normal way. It is also known as color deficiency. Color blindness often happens when someone cannot distinguish between certain colors. This usually happens between greens and reds, and occasionally blues. Most people have three types of colour-sensing cones in their eyes: red, green, and blue. The wavelengths of… Read more →
When a plane lands, the tires are not spinning. The time it takes for the tires to get up to speed is referred to as “spin-up time”. During this time the tires are effectively dragging on the runway and being put under pressure by the aeroplane’s weight. This can be seen in the slight puff of smoke from a landing… Read more →
Identical twins indeed share their DNA code. This is because identical twins were formed from the same sperm and egg from their father and mother. (In contrast, fraternal twins are formed from two different sperm and two separate eggs.) Usually, the egg and sperm come together and create an embryo, which eventually grows into a human baby. However, in the… Read more →
It depends on what you mean by “lightning”. Yes, because charge can flow across a vacuum, but No, because you won’t see anything. Lightning is a sudden electrostatic discharge between regions of differing electric potential. It has been observed on Venus, Jupiter and Saturn, as well as Earth. There is little material to act as a conductor of charge in… Read more →
A dream includes the images, thoughts, and emotions that are experienced during sleep. Dreams can range from extraordinarily intense or emotional to very vague, fleeting, confusing, or even dull. Some dreams are joyful, while others are frightening or sad. Sometimes dreams seem to have a straightforward narrative, while many others appear to make no sense at all. Many suggest that… Read more →
All Mouse-sized micro-Bats use ultrasound calls for echolocation, but fruit bats and flying foxes (megabats) have lost this ability. Although we can’t hear it, echolocation requires bats to scream at 130 decibels! That takes a lot of energy, but the micro-Bats can harness some of their wingbeats’ muscular efforts to generate the air pressures needed for their ultrasound calls. Mega… Read more →
Different painkillers cure headaches in different ways. Two critical types of painkillers are most commonly used. The first type of painkillers are Aspirin medicines includes ibuprofen and paracetamol, which blocks the body’s prostaglandins (the chemical that produces swelling and pain), reducing swelling in the area and therefore reducing the intensity of pain. These aspirin medicines are used frequently for mild… Read more →
