Scientists estimate that by the year 2013, the world's population will reach:

A. 1 billion

B. 6 billion

C. 7 billion

D. 10 billion

3 ppl were at a restaurant the bill was $30 the waiter overcharged them the bill was only 25 he didn't no how to split it equally so he gave them a dollar back an pocketed the rest 9 * 3 = 27+2=29 where is the other dollar

3. The current in a flashlight powered by 4.5 Volts is 0.5 A. What is the power delivered to the flashlight? 4. If the flashlight in the previous problem is left on for 3 minutes, how much electric energy is delivered to the bulb?

Does the sun fuse hydrogen into helium or vice versa?

Is pure water an acidic, basic, or neutral substance? is the ph of a strong acid higher or lower than the ph of a weak acid of the same concentration?

The following balanced equation shows the synthesis of ammonia (NH3). According to this equation, how many hydrogen atoms are in the final product?

A teacher pushed a 10-kg desk across a floor for a distance of 5 m she exerted a horizontal force of 20 N how much work is done

Carbon and oxygen, both nonmetals, bond to form a compound. What is the name of the carbon compound with one carbon and two oxygens? A) carbon oxide B) carbon dioxide C) carbon dioxygen D) monocarbon dioxide

Salt water has greater density than fresh water. A boat floats in both fresh water and in salt 12) water. Where is the buoyant force greater on the boat?

A 1000-kg space probe is motionless in space. to start moving, its main engine is fired for 5 s during which time it ejects exhaust gases at 5000 m/s. at the end of this process it is moving at 20 m/s. the approximate mass of the ejected gas is:

In the fishbowl, the glass, water, rocks, and plastic plants are in thermal equilibrium. This situation means the temperature of the rocks is? F. If the water is 75 degrees