Answer the following question given this paragraph: Ultraviolet radiation has the highest energy; infrared the lowest. Q: Ultraviolet radiation has the highest energy; which has the lowest? Choices: - kinetic - nuclear - thermal - infrared A:
infrared
Answer the following question given this paragraph: Ultrasound in Medical Diagnostics When used for imaging, ultrasonic waves are emitted from a transducer, a crystal exhibiting the piezoelectric effect (the expansion and contraction of a substance when a voltage is applied across it, causing a vibration of the crystal). These highfrequency vibrations are transmitted into any tissue in contact with the transducer. Similarly, if a pressure is applied to the crystal (in the form of a wave reflected off tissue layers), a voltage is produced which can be recorded. The crystal therefore acts as both a transmitter and a receiver of sound. Ultrasound is also partially absorbed by tissue on its path, both on its journey away from the transducer and on its return journey. From the time between when the original signal is sent and when the reflections from various boundaries between media are received, (as well as a measure of the intensity loss of the signal), the nature and position of each boundary between tissues and organs may be deduced. Reflections at boundaries between two different media occur because of differences in a characteristic known as the acoustic impedance Z of each substance. Impedance is defined as. Q: What diagnostic technology uses high-frequency vibrations transmitted into any tissue in contact with the transducer? Choices: - laser - radiation - sonar - ultrasound A:
ultrasound
Q: Answer the following question given this paragraph: The outer ear includes the pinna, ear canal, and eardrum. Q: The eardrum is part of what part of the ear? Choices: - main - thin - inner - outer A:
A: outer
Question: Answer the following question given this paragraph: The attractive force between water molecules is a dipole interaction. The hydrogen atoms are bound to the highly electronegative oxygen atom (which also possesses two lone pair sets of electrons, making for a very polar bond. The partially positive hydrogen atom of one molecule is then attracted to the oxygen atom of a nearby water molecule (see Figure below ). Q: The attractive force between water molecules is what kind of reaction? Choices: - symmetrical reaction - aquatic reaction - diffusion reaction - dipole reaction A:
Answer: dipole reaction
*Question*
Answer the following question given this paragraph: The main organs of the cardiovascular system are the heart and blood vessels. Both organs contain valves. Valves also are found in plumbing systems. They can be turned on or off to control the flow of water. Q: The main organs of the cardiovascular system are the blood vessels and what else? Choices: - alveoli - capillaries - lung - heart A:
**Answer**
heart
(Question)
Answer the following question given this paragraph: The sunlight that reaches Earth is the planet's most important source of energy. The energy in sunlight, called solar energy, is electromagnetic energy. This is a form of energy that travels through space in electric and magnetic waves. Solar energy can be used to heat homes and produce electricity in solar cells like those on the roof seen in the Figure below . Sunny areas receive plenty of sunlight to generate electricity, but solar energy may not be practical in areas that are often cloudy. Q: What is the most important source of energy on earth? Choices: - the earth's core - water - moon - sun A:
(Answer)
sun