8. Humans need oxygen to break down food in order to provide energy for cells. The oxygen needed for this process is delivered by an organ system called the A. respiratory system. B. lungs. C. digestive system. D. alveolus.

How does an airplane's kinetic energy and potential energy change as it takes off and lands

If the input work for a car is 200 joules, what is the output work?

An object stays at rest until what happens to it? a. inertia releases it. b. gravity overcomes friction. c. friction builds up and moves the object. d. an outside or unbalanced force acts upon the object.

The 3rd bright fringe of a double slit interference pattern is 30.0 cm above the central bright fringe. If the angle from the horizontal to this 3rd bright fringe is 12.

An element like silicone is not usually used to make wires or pains because it

When a certain isotope, such as U-238, is hit by a neutron, it will always split into the same smaller nuclei. true or false?

A person walks 7 feet east stops and walks 7 feet west

Using the drop-down menus, choose the right government service to complete each sentence. Providing a free public education for all children is an example of supporting. Fighting fires is one way in which the government ensuresfor citizens.

A galilean telescope adjusted for a relaxed eye is 36cm long. If the objective lens has a focal length of 40cm, what is the magnification?

If a car goes along a straight road heading east and speeds up from 45 ft/s to 60. ft/s in 5 sec, calculate the acceleration