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

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