sound wave of frequency 640 Hz travels 8oom in 2.5 s. calculate: (a) speed of sound (b) wavelength of sound wave

Mineral is commonly used as an abrasive?

What is the mass number of an isotope of this atom that has 2 neutrons

Which selection is a characteristic of both living and nonliving things

Calculate the final temperature when 50 ml of water at 80°c are added to 25 ml of water at 25°c.

High mass stars are more massive produce more energy burn brighter and have shorter life cycle than low mass stars True or false

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?

Which of the following is an example of potential rather than kinetic energy? a. water rushing over Niagara Falls b. a molecule of glucose c. a crawling beetle foraging for food d. light flashes emitted by a firefly

If a force of 15 newtons [N] is applied to a surface and the pressure is measured as 4,000 pascals [Pa], what is the area of the surface in units of square milimeters [mm2 ]?

An engineer has the task of producing an aluminum alloy with a density of 3.0 grams per cubic centimeter. She comes up with the perfect alloy and saves a sample of it. Which mass and volume measurements correspond to this sample? 7 g and 2.

What must be your car's average speed in order to travel 235km in 3.25 hours?