Which isotope is appropriate for dating rocks that are billions of years old? carbon-12

carbon-14

uranium-238

oxygen-16

Sprinters start their races from a crouched position with their bodies well forward of their feet. This position allows them to accelerate quickly without tipping over backward. Explain.

We understand that the citizenship of an individual is a

In which group of plants do gymnosperms and angiosperms belong? a. seedless vascular plants b. nonvascular plants c. seed-bearing vascular plants d. seed-bearing nonvascular plants

Let the force of the Moon on the Earth be F1. Let the force of the Earth pulling on the Moon be F2. Which of the following is greater? F1 ⊝ F2 ⊝ neither F1 nor F2 ⊝ cannot be determined without additional information

Compare and contrast electrical and magnetic forces

A graph that shows that the pressure of a gas varies inversely with its volume under constant temperature demonstrates A. The pressure law B. The density law C. Charle's law D. Boyle's law

5. Why should the electrons be placed separate from each other (why not together) ?

A battery high rate discharge (load capacity) test is being performed on a 12 volt battery. Technician A says that a good battery should have a voltage reading of higher than 9.6 volts while under load at the end of the 15-second test.

The number of significant digits in the mass of a body measuring 4200.0 kg is 2.

Two forces of intensities 3 N and 4 N act simultaneously on a body. If these forces have the same direction and sense, what is the intensity of the resulting force?