Identify the type of force described (contact or noncontact):

The force that is exerted when a shopping cart is pushed:

The force that causes a metal ball to move toward a magnet:

Specialization occurs when a person or a business focuses on providing one product or service that they are good at? true or false

In a pipe closed at one end and filled with air, a 384-Hz tuning fork resonates when the pipe is 22 cm long; this tuning fork does not resonate for any smaller pipes. a.

Describe how thermal energy is transferred through radiation

Acid precipitation is caused by a mix of A. respiration, carbonic acids, and seawater. B. water, soil, and air. C. sulfur dioxide, carbon dioxide, and nitrogen oxides. D. hydrogen, oxygen, and saline.

A student wanted to investigate whether or not the temperature of the water would affect the solubility of sugar. She had three glasses of water each with 200 mL of water in them.

When is the data considered valid

Which of the following are not part of the stages in cognitive development? A. Sensorimotor B. Concrete C. Formal D. Semi-formal E. Formal operational

If an ice cube melts at 0°C but water freezes at 0°C what is the difference between melting and freezing in terms of energy involved with phase changes and be particles of substances during the phase changes?

Why do the upper levels of Neptune's atmosphere appear blue?

An athlete has a mass of 62 kg and a volume of 65 liters. What is the density is kg/l?