Potassium Permanganate is used for purifying drinking water, because

A. it is a sterilising agent

B. it dissolves the impurities of water

C. it is a reducing agent

D. it is an oxidising agent

Lab 7B Conservation of Energy What limits how much a system may change?

Slow pain originating from an internal organ is often perceived as coming from an area of the body totally unrelated to the source. this is known as

During a hard sneeze, your eyes might shut for 0.50 s. If you are driving a car at 90 km/h during such a sneeze, how far does the car move during that time?

Which explains the information needed to calculate speed and velocity? Both require the total distance, but velocity also requires time and displacement. Both require time, but velocity requires displacement and speed requires distance.

The Eiffel Tower is a steel structure whose height increases by 19.4 cm when the temperature changes from - 9 to 41 oC. What is the approximate height (in meters) at the lower temperature?

Jill is getting ready to push little Frank in his swing. She pulls Frank back as high as she can and then releases the swing. What is the initial transfer of energy that accelerates the swing when she lets go?

Which phenomenon generates electric current? A black body radiation B ultraviolet catastrophe C emission spectra D photoelectric effect

What is the product of 3.15 m and 2.006 m with the correct number of significant figures?

Consider what happens at the moment when the block leaves the surface of the globe. Which of the following statements are correct? - The net acceleration of the block is directed straight down.

A mechanic pushes a 3.00 ✕ 103-kg car from rest to a speed of v, doing 4,680 j of work in the process. during this time, the car moves 26.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.