Category: Physics

How does a ping pong ball float on a hair dryer? The ping-pong ball stays within the column of air coming from the hair dryer because of air pressure. The air coming from the hair dryer is moving faster than the air around it, and this means that it also has a lower air pressure […]

What is the normal pressure of carbon dioxide CO2 in the arterial blood in Torr? A small amount (5%) of the CO2 is dissolved in the blood, and in the form of soluble carbonic acid (H2CO3)….ABG (Arterial Blood Gas) pH 7.31–7.41 pCO2 41–51 torr 5.5–6.8 kPa pO2 30–40 torr 4.0–5.3 kPa CO2 23–30 mmol/L Base […]

How do you calculate the power consumption of a resistor? First, we use Ohm’s law ( V = I × R ), to find the current through the resistor. The voltage across the resistor is V = 9 V. The resistance of the resistor is R = 100 ?. Then, we can use the power […]

What is the value of least count? The least count error is the error associated with the resolution of the instrument. A metre ruler may have graduations at 1 mm division scale spacing or interval. A Vernier scale on a caliper may have a least count of 0.1 mm while a micrometer may have a […]

What is the probability of rolling at least one 6 with two dice? 30.5 % What is the probability of rolling at least one 2 with two dice? Since there are six possible outcomes, the probability of obtaining any side of the die is 1/6. The probability of rolling a 1 is 1/6, the probability […]

Why will blue laser light allow closer pits than red laser light? A blue light has a smaller wavelength, so the focus spot of the blue light would be smaller. Thus, the blue light allows closer pits without overlapping. What type of light is laser? Ultraviolet radiation for lasers consists of wavelengths between 180 and […]

How do we determine the number of neutrons? For all atoms with no charge, the number of electrons is equal to the number of protons. The mass number, 40, is the sum of the protons and the neutrons. To find the number of neutrons, subtract the number of protons from the mass number. number of […]

Why is diamond so precious? The earliest recorded cultures used diamonds to portray strength, the value of love, and even instruments of magic. That value is likely due to a diamond’s natural strength and unique visual appearance in combination with its relative rarity. Even a low-grade gem-quality diamond is still a thing of value and […]

What is scalar multiple of a vector? In common geometrical contexts, scalar multiplication of a real Euclidean vector by a positive real number multiplies the magnitude of the vector—without changing its direction. The term “scalar” itself derives from this usage: a scalar is that which scales vectors. What is it called when you add two […]

What organs does the thyroid affect? The thyroid gland produces hormones that regulate the body’s metabolic rate controlling heart, muscle and digestive function, brain development and bone maintenance. Its correct functioning depends on a good supply of iodine from the diet. Are thyroid hormones steroids? Depending on the molecule, amino acid hormones can act as […]