Why is it better to breathe through the nose than the mouth?

An atom has at least one positive proton and at least one negative electron. Which of the following is true about the protons and electrons in an atom? A. Protons and electrons orbit close together around a central nucleus. B.

Heated air molecules in a hot air balloon soon carried thermal energy to the top of the balloon. this is an example of ... conduction. Convection. Radiation. Cooling.

Which of the following statements best defines a sample space? a. A sample space is one particular outcome for a given situation. b. A sample space is the set of all possible outcomes for a given situation. c.

A rubber band has a spring constant of 15 N/m. If you stretch it by 0.3 m, what is the magnitude of the force that resists the stretching? O A. 6.2 N B. 4.5N O C. 5.0 N O D. 3.0N

What force oppose other forces and slow objects down?

Which structure connects muscles to bone?

A firefighter mounts the nozzle of his fire hose a distance 36.9 m away from the edge of a burning building so that it sprays from ground level at a 45° angle above the horizontal. After quenching a hotspot at a height of 8.

A force is applied to a 13.0 kg wagon to pull it down the sidewalk at a constant speed. The coefficient of kinetic friction is 0.65. Considering the resulting frictional force, what is the magnitude of the applied force?

What field (s) does a moving electron have? A. electric and gravitational fields B. magnetic and gravitational fields C. gravitational, electric, and magnetic fields D. electric field only

Copper has a specific heat of 0.385 j. A piece of copper absorbs 5000 J of energy and undergoes a temperature change from 100 Celsius to 200 degrees Celsius. What is the mass of the piece of copper?