A poem on the body system

Imagine an object falling to the Earth. Which of the following most accurately describes the motion of that object? A. Its motion is random as it falls. B. It falls toward the center of the Earth. C. It falls southward. D.

The element carbon has 3 naturally occurring isotopes. About 99% of carbon isotopes are C-12, about 1% are C-13, and a tiny amount are C-14. What is the average atomic mass of carbon atoms? A) 11.01 amu B. 12.01 amu C. 13.01 amu D. 14.01 amu

Examples of energy balance: physical education

A series circuit has four resistors. The current through one resistor is 810 mA. How much current is supplied by the source? 0.810 mA 8.10 mA 81.0 mA 810 mA

An elevator is moving down at a constant rate of 4 m/s. A person is standing on a scale that says the person weighs 80 N. When it reaches the bottom, it comes to a stop in 2 seconds. During the stopping process, what is the reading on the scale?

Sarah added sugar to her iced tea, but it is not dissolving very quickly. Which can Sarah do to make the sugar dissolve faster? Add more sugar. Heat the tea. Add more ice.

Positively-charged particles consisting of two protons and two neutrons emitted by radioactive materials. True or False

A package of aluminum foil is 59.3 yd long, 13 in. wide, and 0.00040 in. thick. If aluminum has a density of 2.70 g/cm3, what is the mass, in grams, of the foil?

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