How many helium atoms are in a balloon? A balloon contains 3.6 x 10^25 helium atoms. How many atoms of helium gas fill a spherical ball of radius? 1.35×103 m. What is the average kinetic energy of the helium atoms? The standard value of Boltzmann’s constant is equal to 1.38×10−23 J/K 1.38 × 10 − […]
What is plasma radiation used for?
What is plasma radiation used for? The response of plasma to electromagnetic fields is used in many modern technological devices, such as plasma televisions or plasma etching. Depending on temperature and density, a certain amount of neutral particles may also be present, in which case plasma is called partially ionized. Does plasma emit light? A […]
Is I2R a power?
Is I2R a power? This discovery, published in 1841, followed the form of the last equation (P = I2R), and is properly known as Joule’s Law. However, these power equations are so commonly associated with the Ohm’s Law equations relating voltage, current, and resistance (E=IR ; I=E/R ; and R=E/I) that they are frequently credited […]
Which planet has lowest escape velocity?
Which planet has lowest escape velocity? Therefore the smaller the planet the less the escape velocity will be…. Planet Observations Escape Velocities (km/sec) Mass Relative to Earth Earth 11.2 1 Jupiter 63.4 317.8 Mars 5 0.11 Mercury 4.2 0.06 What is Sun’s velocity? Sun Observation data Velocity ≈ 220 km/s (orbit around the center of […]
Does unplugging microwave save money?
Does unplugging microwave save money? For example, unplugging your coffeemaker or microwave is unlikely to make a significant difference, while a computer, modem, and monitor, TV, phone charger, or cable box all consume a considerable amount of electricity even when not in use. Does unplugging things really save money? Myth: Unplugging your devices saves power […]
Is net flux always zero?
How do you know if a collision is elastic?
How do you know if a collision is elastic? If the kinetic energy is the same, then the collision is elastic. If the kinetic energy changes, then the collision is inelastic regardless of whether the objects stick together or not. In either case, for collisions with no external forces, momentum is conserved. Are elastic collisions […]
What are 3 ways to increase solubility?
What are 3 ways to increase solubility? Factors affecting solubility Temperature. Basically, solubility increases with temperature. Polarity. In most cases solutes dissolve in solvents that have a similar polarity. Pressure. Solid and liquid solutes. Molecular size. Stirring increases the speed of dissolving. How can you increase the solubility of a salt? Crushing or grinding increases […]
Do students have 1st Amendment rights?
Do students have 1st Amendment rights? The U.S. Supreme Court has said that students “do not shed their constitutional rights to freedom of speech and expression at the schoolhouse gate.” Though public school students do possess First Amendment freedoms, the courts allow school officials to regulate certain types of student expression. What is the biggest […]
What should you do if you are near an aggressive driver?
What should you do if you are near an aggressive driver? Responding to aggressive driving and road rage Do not respond to the other driver. Avoid eye contact with the aggressive driver or occupants. Be tolerant and forgiving. Be sure to allow enough room around your vehicle so that you can pull out or around […]