Which of the following lasers falls into the invisible part of the electromagnetic spectrum, is absorbed by cellular fluid, and is not dependent on tissue color? a. Nd:YAG b. Ho:YAG c. argon d. CO_(2)
If the resistance of the run winding decreases, the __ motor will draw too much current while it is running centrifugal starting switch will not start the motor load on the motor is probably too great motor probably will not start
a 4.0 kg object moves at 8.0m/s what is its momentum? 32kgtimes m/s 12kgtimes m/s 24kgtimes m/s 48kgtimes m/s
What is the formula for momentum? p=m+v p=mtimes v p=mdiv v p=vdiv m
What are the two most essential components of any medium, regardless of whether it is liquid or solid, or what type of container is used?
What liquid property is defined as the spontaneous flow of a liquid into a narrow tube or porous material? capillary action surface tension vapor pressure volality
Please select the word from the list that best fits the definition In his model of the atom, protons and neutrons make up most of the mass, while electrons make up most of the volume square
A proton is a subatomic particle carrying a charge equal to but opposite that of an electron. Please select the best answer from the choices provided T F
Please select the word from the list that best fits the definition Subatomic particle that has a positive charge and that is found in the nucleus of an atom square
The first law of thermodynamics states that: A All energy on Earth comes from the sun B Oxidation and reduction reactions are always coupled C Energy cannot be created or destroyed D All chemical reactions have activation energy
Select the true statements. The distance across a galaxy group is usually a few hundred thousand light-years. Stars cluster together to form galaxy groups. Galaxy groups typically contain several hundred galaxies. Galaxy groups are mostly composed of empty space.
The variable you change on purpose in an experiment is called the independent variable . It is what you are testing to see how it affects the result. In this activity., what was that variable? The height you dropped the ball from The bounce height the ball reached The kind of graph you made C The number of times you collected data
The portion of the larger electromagnetic spectrum that humans can see is known as the __ visible spectrum Infrared spectrum microwave spectrum vestibular spectrum
Problem 17 A tiger leaps horizontally from a 7.5-m-high rock with a speed of $3.0m/sec$ How far from the base of the rock will she land?
How are work and energy related? (Read the procedure section carefully). A Energy is the ability to do work, and work is the mean by which energy changes from one form to another. B Energy is work multiplied by time, and work is equal to power. C Energy is the ability to do work, and work is energy divided by time. D Energy is the ability to do work, and work is power divided by energy. E Energy is the ability to do work, and work is energy multiplied by time.
In 2009, an earthquake hit Costa Rica, registering a 6.1 on the Richter scale. What was the intensity of this earthquake, assuming the reference value was 1? $(R=log(\frac {I}{I}_{0}))$ A. 5.1 B. $4.46\times 10^{2}$ C. $1.26\times 10^{5}$ D. $1.26\times 10^{6}$
16) Classify as scalar or vector. magnitude plus direction vector neither scalar
4. NASA wants to measure X-Rays but only have equipment that can measure Gamma Rays. Lesson NASA has to develop a new piece of equipment that detects difference wavelengths. Does NASA have to develop a new piece of equipment that detects longer or shorter wavelengths? Explain. __ 5. What is the order of electromagnetic waves from shortest wavelength to longest? __ 6. What is the order of electromagnetic waves from highest frequency to lowest frequency? __ 7. The sun produces all of these rays. Why do you think that not all of these rays are not hitting earth's surface? Explain your answer. __
3. What is the difference between a law about gravity and a theory about gravity?(14 Points) A law says objects fall, while a theory of gravity explains the pull between masses A theory of gravity is less scientific than a law of gravity A theory about gravity is just a guess, while a law is proven forever A law describes what gravity does , while a theory ex- plains why gravity works
1. Describe an example of something with high density and something with low density.
