What is the mass number and charge of the emitted positron? This positron can be called a beta plus (β+) particle – this process is known as positron emission. A positron is the antimatter version of an electron. It has the same relative mass of zero, so its mass number is zero, but a +1 […]
Which principle is used in rocket?
Which principle is used in rocket? The propulsion of all rockets, jet engines, deflating balloons, and even squids and octopuses is explained by the same physical principle—Newton’s third law of motion. Matter is forcefully ejected from a system, producing an equal and opposite reaction on what remains. Another common example is the recoil of a […]
What is the purpose of dark matter?
What is the purpose of dark matter? [+] Dark matter is the most mysterious, non-interacting substance in the Universe. Its gravitational effects are necessary to explain the rotation of galaxies, the motions of clusters, and the largest scale-structure in the entire Universe. Can we see dark matter? Although we cannot see dark matter and we […]
What would happen if the orbit was circular?
What would happen if the orbit was circular? “If the Earth’s orbit were a perfect circle, we would not have seasons.” This statement is clearly false. A perfectly circular orbit would mean that the earth is always the same distance from the sun. However, the primary cause of our seasons is the tilt of the […]
How important is the lithosphere?
How important is the lithosphere? The lithosphere is largely important because it is the area that the biosphere (the living things on earth) inhabit and live upon. When the biosphere interacts with the lithosphere, organic compounds can become buried in the crust, and dug up as oil, coal or natural gas that we can use […]
How much power does a 5kW solar system produce per day?
How much power does a 5kW solar system produce per day? 5kW Solar System Details: Produces 5,000 watts of DC (direct current) power. Requires up to 400 square feet of space to produce an estimated 350 to 850 kWh (kilowatt hours) of AC (alternating current) power monthly. Is 5 kW solar enough? On average, a […]
How can you make it safe to exercise on a hot day?
How can you make it safe to exercise on a hot day? Stay safe during hot-weather exercise by drinking enough fluids, wearing proper clothing and timing your workout to avoid extreme heat. Whether you’re running, playing a pickup game of basketball or going for a power walk, take care when the temperature rises. Why is […]
What frequencies are dangerous?
What frequencies are dangerous? The most restrictive limits on whole-body exposure are in the frequency range of 30-300 MHz where the RF energy is absorbed most efficiently when the whole body is exposed. For devices that only expose part of the body, such as mobile phones, different exposure limits are specified. What is the range […]
What are logical absolutes?
What are logical absolutes? The term ‘the logical absolutes’ refers to what are also known as the ‘laws of thought[1]’. Classical philosophers took these laws to be as follows: The law of identity — All things are equal to themselves. The law of non-contradiction — No proposition can both be and not be (the case). […]
What is heat loss by radiation?
What is heat loss by radiation? Radiation is a form of heat loss through infrared rays. This involves the transfer of heat from one object to another, with no physical contact involved. For example, the sun transfers heat to the earth through radiation. The last process of heat loss is evaporation. How can a patient […]