## Increasing the mass attached to a spring will decrease the angular frequency of its vibrations.

Question Increasing the mass attached to a spring will decrease the angular frequency of its vibrations. True or False? Answer Answer: decreases Explanation: The angular frequency of the mass is given by where, k is the spring constant and m be the mass of the body which is doing oscillations. if the mass of the … Read more

## Since v = λ f, the speed v of a wave depends on its frequency f.

Question Since v = λ f, the speed v of a wave depends on its frequency f. True or False?  Answer It’s ++FALSE++, the reason is: speed of the wave depends on the properties of the medium. Example: for a mechanical wave, speed of wave depend on elastic and inertial properties of the medium for … Read more

## What is the purpose of scientific probes?

Question What is the purpose of scientific probes?  A) They help astronomers see distant galaxies with the naked eye. B) They enable ordinary citizens to make scientific observations. C) They allow scientists to measure features such as flow rate and conductivity. D) They teach meteorologists how to record air and wind pressure. Answer Option D, … Read more

## The length of a 60 W, 240 Ω light bulb filament is 60 cm

Question The length of a 60 W, 240 Ω light bulb filament is 60 cm. Remembering that the current in the filament is proportional to the electric field, what is the current in the filament following the doubling of its length? Answer Answer: Finally current will be i = 0.35 A Explanation: As we know … Read more

## Complete the tables of value for four aqueous solutions at 25 Celsius

Question Complete the tables of value for four aqueous solutions at 25 celsius. Answer 1 (Expert Verified) There are a total of four parameters you need to know to determine the pH of the solution. The pH and the pOH are negative logarithms of the concentrations of the ions H+ and OH-, respectively. These ions … Read more

## At what height h above the ground does the projectile have a speed of 0.5v?

Question At what height h above the ground does the projectile have a speed of 0.5v?Express your answer in terms of v and the magnitude of the acceleration of gravity g. Answer Answer: Explanation: It is given that, Speed of the projectile is 0.5 v. Let h is the height above the ground. Using the … Read more

## Which salts will be more soluble in an acidic solution than in pure water?

Question Which salts will be more soluble in an acidic solution than in pure water? Answer The solubility of any substance whose anion is basic will be affected to some extent by the pH of the solution. For example, consider Mg(OH)2, A saturated solution of Mg(OH)2 has a calculated pH of 10.52 and contains [Mg2+] … Read more

## In superheroes, the ability to Fly (F) is dominant over not being able to fly (f).

Question In superheroes, the ability to Fly (F) is dominant over not being able to fly (f). Superman can fly (Ff) (he has one dominant and one recessive trait). He marries Storm (from the X-men) who also has one dominant and one recessive trait (Ff), and can fly. Answer Answer: Probability that the descendents are … Read more

## A 0.50-mm-wide slit is illuminated by light of wavelength 500 nm.

Question A 0.50-mm-wide slit is illuminated by light of wavelength 500 nm. What is the width of the central maximum on a screen 2.0 m behind the slit? Answer Answer: Explanation: A single slit of width x has bright central maximum of width: ω=(2λL)/x Given data x=0.50 mm λ(wavelength)=500 nm L(length)=2.0 m Substitute the given … Read more

## For the following reaction KClO4 → KCl + 2O2 Assign oxidation states to each element on each side of the equation.

Question For the following reaction KClO4 → KCl + 2O2 Assign oxidation states to each element on each side of the equation. Reactant Product K Cl O Which element is oxidized? Which element is reduced? Answer (Expert Verified) Oxidation states number (OSN) show how many electrons gained, lost or shared during chemical reactions.  Here are … Read more