物理
運動學、受力分析、電學與方程推導。
-
what are the percentages of sand, silt, and clay in soil with a texture…
Sand: 30%, Silt: 50%, Clay: 20%
-
the main purpose of a boiling water is to convert cold ocean water into…
generate electricity for our society.
-
roaring 20s people important person|description of life and achievement…
J. Edgar Hoover: First Director of the FBI, shaped US law - enforcement. Sacco and Vanzetti: Anarchists involved in a highly publicized and controversial trial. Warren G. Harding:…
-
temperature is defined as: * 10 points the energy that is transferred b…
The measure of the average kinetic energy of particles.
-
which of the following is the best description of convection? * heat tr…
Heat transfer through movement in fluids.
-
text 1 dance choreographer alvin aileys deep admiration for jazz music …
B. Ailey's work was strongly influenced by jazz.
-
16. matter can be created, but not destroyed. a. true b. false
B. False
-
heat is defined as: * the energy that is transferred between objects th…
The energy that is transferred between objects that have different temperatures.
-
thermal energy is defined as: * the energy that is transferred between …
The sum of the kinetic energy of all the particles in a substance.
-
question 3 during a rocket launch, the engines produce ↑6000 n while gr…
$8$ m/s² $\uparrow$
-
kinetic energy is defined as: * 10 points the energy that is transferre…
Energy of an object due to its motion.
-
2 quiz- snapshot 1.1 questions √question 1 √question 2 √question 3 ?que…
A. 50 kg
-
question 3 20 pts a 40 kg box is pulled by two ropes: ↑125 n and ↑95 n.…
$5.5$ m/s² $\uparrow$
-
what fitness tools, equipment, and technology do you have available to …
Some common home - available fitness tools and equipment include dumbbells, resistance bands, yoga mats, and stability balls. For example, if I choose resistance bands, I plan to …
-
which of the following is not an example of radiation? the heat from th…
A baking pan heating in the oven
-
question 2 three children push a sled: ↑75 n, ↑45 n, and ↓30 n. if the …
$6\text{ m/s}^2\uparrow$
-
question 1 a bicycle and rider with combined mass of 80 kg accelerate a…
B. 160 N
-
which of the following is an example of heat transfer through convectio…
Water boiling
-
the image below shows a thermal scan of a person holding a beaker of wa…
The person holding the beaker.
-
which of the following describes how heat transfers? * 10 points heat t…
Heat transfers from an area of high temperature to an area of low temperature.
-
frank has an eraser. it has a mass of 4 g, and a volume of 2 cm³. what …
$2\ g/cm^{3}$
-
directions: use the websites provided to complete this environmental sc…
1. Another name for red tide is harmful algal bloom (HAB). 2. HABs are different from regular algae because they can produce toxins or cause other harmful effects through rapid al…
-
in general what is the most dense form of matter? solid plasmas gas liq…
solid
-
which economic forces within the colonies were at play in spurring the …
British seizure of colonial companies
-
9. anything that takes up space and has mass is called _. a. energy b. …
C. matter
-
volume is ____________. how many atoms how much matter is in an object …
how much space an object takes up
-
which of the following substances would float in water? (hint: water ha…
cork
-
true or false: the density of a specific type of material never changes…
False
-
the diagram shows a person applying an action force to a diving board. …
The reaction force acts in the opposite direction to the action force.
-
true or false: the density of a specific type of material never changes…
False
-
3.4 quiz- snapshot 1.2 started: oct 10 at 2:26pm quiz instructions ques…
D. Newton's Third Law
-
a book remains at rest on a table until a student pushes it. which law …
Newton's First Law
-
jack has a rock. the rock has a mass of 14 g and a volume of 2 cm³. wha…
C. $7$ g/cm³
-
3 how did the french and indian war influence george washingtons early …
It gave him a reputation as a strong leader It resulted in his promotion in the British Army
-
question 1 20 pts a soccer player kicks a ball. the ball accelerates ac…
A. Newton's Second Law
-
which liquid is the least dense? syrup oil plastic bottle water
Oil
-
1. based on information in the article, how have emojis affected text c…
1. B. They have made people's intentions and emotions clearer. 2. A. People's brains are wired to use symbols and images to convey meaning. 3. D. committee
-
2.2. describe the political context of the constitutional convention an…
Correct Answer(s): The U.S. government could not enforce treaties.; The U.S. government had no power to intervene when radical factions began influencing some state governments. I…
-
a hammer strikes a nail. which statement best applies newtons laws to t…
Hammer exerts force on nail, nail exerts equal and opposite force on hammer
-
a soccer ball is kicked across a field. which statement correctly ident…
1st, 2nd, and 3rd law descriptions all correct
-
3.5 quiz- snapshot 2.1 started: oct 10 at 2:23pm quiz instructions ques…
Box A accelerates more than Box B
-
a rocket launches upward. which of the following best describes how new…
1st Law: Rocket continues moving in space once engines shut off due to inertia, 2nd Law: More thrust creates greater acceleration, 3rd Law: Exhaust gases pushed backward push rock…
-
the amount of matter something contains is its _____________. gas weigh…
D. mass
-
a 600 kg roller coaster car is at the top of a hill. when it goes down,…
C. $5m/s^{2}$
-
if an object has a density of .6 g/cm^3 and you put it into water, will…
float
-
use the picture to select the correct statement. is less dense then cra…
The paper clip is denser than everything else
-
density is measured with what units? centimeters (cm) grams (g) pounds …
D. g/cm3
-
question 5 4 pts what is a wave? a wave is matter that travels through …
B. A wave is a disturbance that transfers energy from one place to another without the transfer of matter.
-
if the density of a bar of gold is 19.3 g/cm³ and you cut it into 4 pie…
19.3 g/cm³
-
in the wave diagram, the horizontal distance from crest to crest (a, b,…
Wavelength
-
which liquid is the least dense? plastic bottle syrup oil water
oil
-
question 3 4 pts a student increases the number of waves produced per s…
B. Frequency
-
the distance between two consecutive crests in a transverse wave is cal…
C. Wavelength
-
anything that takes up space and has mass is liquid volume matter atom
C. Matter
-
if an object has a density of 3.6 g/cm^3 and you put it into water, wil…
sink
-
types of decay reactions state whether each of the following decay reac…
1. Alpha decay 2. Beta decay 3. Beta decay
-
the diagram shows a transverse wave. a vertical arrow is drawn from the…
Amplitude
-
why does ice float? liquid water is less dense than solid water. solid …
Solid water is less dense than liquid water.
-
interpreting the data: 1. during 1906 and 1907, identify the two method…
Common methods could be predator control and habitat management.
-
positive practices that escalate positive outcomes because of their ass…
First question: C. amplifying Second question: C. positive
-
steve has been doing his own taxes for years and recently ran into a pr…
1. B. instrumental support 2. B. organizational culture and climate
-
4. in paragraph #4, it states that an estimated 60,000 deer starved to …
The deer population dropped drastically over two winters because it exceeded the carrying - capacity, overgrazed ecological resources, faced food scarcity leading to vulnerability…
-
if your vehicle gas pedal sticks, you should: shift into neutral and ap…
Shift into neutral and apply the brakes
-
why did many american colonists oppose the quartering act passed by the…
It forced colonists to house and supply British soldiers without their consent
-
lee and victor are good friends. lees laptop computer has become very s…
First question: instrumental support. Second question: organizational culture and climate.
-
lee and victor are good friends. lees laptop computer has become very s…
instrumental support ### Question 2
-
which of the following is true about balancing positive and negative em…
1. Ideally, we should try to have more positive experiences than negative. 2. Pat is biking to school when someone cuts her off and causes her to fall. She gets up and starts kick…
-
question 6 1 pts how did slavery impact the southern economy? it provid…
It provided a labor force for plantations
-
an object that is neutral contains the same number of electrons and pro…
True
-
which of the following is caused by static electricity? a magnet being …
D. a lightning strike during a storm
-
lightning occurs because ____. the negative charges at the bottom of cl…
All of these reasons are correct.
-
the global conveyor belt the global conveyor belt is a system of ocean …
1. Wind, water density differences, and the Coriolis effect drive ocean currents. 2. The two main categories are surface - currents and deep - ocean currents. 3. Thermohaline circ…
-
the difference between attraction and repulsion is that to attract is t…
True
-
if a substance has a higher number of electrons than protons on its sur…
C. A negative charge
-
during a lab a balloon was rubbed with a wooly fabric. this is an examp…
friction
-
electrical charge built up on the surface of an object is called static…
A. static electricity
-
ms pippin rubbed two balloons with a piece of wool. what will happen wh…
B. The balloons will repel each other.
-
what happens when you touch a metal doorknob after rubbing your shoes o…
C. Millions of electrons go from your finger into the doorknob
-
what types of charges attract? negative and neutral positive and neutra…
C. Positive and Negative
-
what is the major difference between static electricity and current ele…
A. Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons
-
which of the following colonial grievances was listed in the declaratio…
The king imposed taxes without colonial consent.
-
the ionizing power of gamma rays is very high. false true
A. False
-
discussion topic follow which films perspective on temporal causality—p…
There is no specific answer as it is a discussion - topic inviting subjective analysis and exploration of philosophical concepts in film.
-
uranium-238 undergoes alpha decay to form what daughter isotope and dec…
Option 4. $_{90}^{234}\text{Th}+_{2}^{4}\text{He}$
-
in a beta decay: the parent and daughter nuclei have the same number of…
For the beta - decay question: The daughter nucleus has one proton more than the parent nucleus For the iron - 56 gamma - decay question: The daughter isotope is iron - 56 and the…
-
in your textbook, read about types of radiation. use the diagram to ans…
5. The positive plate because beta particles are negatively charged and opposite charges attract. 6. Because gamma rays have no charge and thus are not affected by the electric fi…
-
which type of radiation does not change the atomic number or atomic wei…
1. B. Gamma emission 2. C. Nitrogen
-
question 20 (4 points) long sound waves are to short sound waves as a _…
D. Bass; soprano
-
a car and a truck move on a road in the same direction at the same spee…
C. The truck has more mass.
-
in electron capture, what happens to the atomic number? * it remains un…
1. B. It decreases by 1 2. D. Energy release
-
show what you know which is not in proper scientific notation? 5.2×10⁶ …
$0.3\times10^{4}$
-
question 3 1 pts why did colonists oppose the quartering act? it forced…
It forced them to house British soldiers
-
what is unique about beta (β) decay compared to alpha emission? * it al…
1. It changes the atomic number but not the atomic weight 2. A positive electron (antimatter)
-
cca 2 retest a book is laying at rest on a classroom table. which of th…
B. The forces acting on the book are balanced.
-
cca 2 retest possible points: 5.56 an octopus can move through water by…
C. Newton's Third Law
-
question 13 1 pts atm and ocean circ: normal oscillations which of the …
Rain is abundant on the western side of the Equatorial Pacific Ocean
-
scientific method what are the steps in the scientific method? 1. probl…
1. Problem: Identify an issue or question to study. 2. Research: Gather existing information related to the problem. 3. Hypothesis: Formulate a test - able prediction. 4. Experime…
-
2. the table below shows average temperature and precipitation for four…
Location A is near the equator, where rising warm air creates heavy rainfall. - True Location B is near 30° latitude, where sinking air creates dry desert conditions. - True Locat…
-
cca 2 retest 12 of 15 possible points: 5.56 a net force of 17 n is appl…
$6.8$
-
show what you know! which expression is in correct scientific notation?…
$4.5\times10^{2}$