# Physical

B – 2) The difference between impulse and impact force involves the

A) distance the force acts.

B) time the force acts.

C) difference between acceleration and velocity.

D) mass and its effect on resisting a change in momentum.

What are the advantages of space telescopes? – They avoid absorption and refraction effects of the atmosphere, and can use the parts of the electromagnetic spectrum that the atmosphere absorbs.
Thermal Equilibrium – The state of two or more objects or substances in thermal contact when they have reached a common temperature.
Electrical Energy – Energy of electrical charges as a result of their position or motion.
Examples of Longitudinal Waves – Sound + Ultrasound
Shock Waves
how to increase lateral resolution in US – – decrease beamwidth
– increase scan lines per frame
– adjust focal zone (lateral resolution best at focal zone)
Explain how you can be sitting in a chair and it still be moving – Motion is relative
This equation describe the buoyant force on an object immersed in a fluid.Rho is the density of the fluid, V is the volume of fluid displaced by object, and g is gravitational acceleration. –
Newton's Second Law of Motion – The rate of change of momentum of an object is proportional to the applied force and takes place in the direction in which the force acts.
In what kind of collision is momentum conserved? – All types of collisions.
Baroque – 1600-1750
Grand Melodic Lines
Newtons Laws of motion 1) – Unless a resultant force acts on an object it will continue to move in a straight line at a constant speed or remain at rest
Conservation – the statement “If a system is isolated from nonconservative forces, then the total mechanical energy must remain constant” is called the law of _________ of mechanical energy
Why did geologists not accept Wegener's theory? – They felt the evidence was limited and, hence, inconclusive, and that there were more reasonable explanations. Also, Weneger wasn't a geologist himself, and there was no detectable movement of the continents.
Ohm's Law – The idea that if you double the voltage across a component you will double the current (directly proportional relationship so the resistance is constant) providing temperature is held constant.
Atoms are…….. – Tiny particles that are only about one thousandth of a metre wide.

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