Glass is mostly made of silica, which is found in sand. if lead is added to silica to make a crystal vase, the lead is known as the

13. Scientists can work in which of the following. Select all that apply. Universities Government Business and industry Medical Institutes

People hoping to travel to other worlds are faced with huge challenges. one of the biggest is the time required for a journey. the nearest star is 4.1*1016m away. suppose you had a spacecraft that could accelerate at 1.

If the speed of a car is 45 kilometers per hour, how far can it travel in 0.5 hours? A. 22.5 km B. 45 km C. 90 km { Halp Halp Halp Halp Halp Halp Halp Halp }

What are anticlines and synclines? A. They are types of folds created by compressional stresses B. They are folds in rock that are created by tension stresses C. They are types of faults created by tension stresses D.

What are the two most common ways to produce hydrogen gas used in fuel cells?

If the mass of an object is 300kg and the applied force is 3900N, calculate the acceleration

If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them? A. from the hand to the cup B. from the cup to the hand C. from the cup to the surrounding air D.

Big Al stands on a skateboard at a rest and throws a 0.5-kilogram rock at a velocity of 10.0 m / sec. Big Al moves back at 0.05 m/sec. What is the combined mass of Big Al and the skateboard?

What are the element names for the following symbols? Ni, He, Pb

If you are measuring how far a ball traveled in an experiment which example below could be an appropriate measurement? 20 liters 20 grams 20 meters 20 degrees Celsius