物理
运动学、受力分析、电学与方程推导。
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the separation of positive and negative charges due to electric field i…
static charge
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which statement best describes alpha decay? (1 point) after the ejectio…
After the ejection of an alpha particle, the remaining nucleus has a mass number that is four less and an atomic number that is two less, so alpha decay is not a type of nuclear f…
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question 35 (2.5 points) ampa receptors influx mainly na⁺; nmda recepto…
True
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an alpha particle is equivalent to the nucleus of an atom of which elem…
helium
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unit 7 \physical interaction\ test which of the following has the least…
A short, thick metal wire
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in which type of radioactive decay does the nucleus become more stable …
gamma decay
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unit 7 \physical interaction\ test the atoms in a magnet are ○ lined up…
lined up
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which statement best describes the process of alpha decay? (1 point) an…
An unstable nucleus releases a particle containing two protons and two neutrons.
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different kinds of metals have different jobs. for example, the iron in…
Different kinds of metals have different jobs. Because metals are so good at conducting heat and electricity, and because they are so strong and easy to shape, they are the backbo…
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what property does earth have that enables grounding to drain static ch…
It is a large conductor
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8. the newton (n) is the standard unit of force. it is derived from whi…
B. kg·m/s²
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when you break an iron magnet into two pieces, you get o two south pole…
two north poles and two south poles
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which types of particles are involved in a fission reaction? (1 point) …
A. A neutral neutron strikes a large neutral nucleus
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unit 7 \physical interaction\ test an electromagnet is ○ a permanent ma…
C. only operating when the current is on
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choose the option that best matches the job responsibilities given. a m…
Forensic pathologist
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the part of the ear that amplifies sound vibrations is the ____. middle…
A. middle ear
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which changes always happen during a fission reaction? (1 point) the nu…
The number of nucleons stays the same, while the number of nuclei increases.
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a device that increases or decreases voltage in a power line is a ____.…
A. transformer
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in nuclear reactions, information about the nuclei that take place in t…
A nucleus with a large mass will be on the left side, and there will be neutrons in the equation.
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unit 7 \physical interaction\ test an electric field gets stronger as y…
get closer to a charge
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which changes happen in a nuclear fusion reaction? (1 point) the number…
The number of nucleons stays the same, while total mass decreases slightly.
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unit 7 \physical interaction\ test the brightness of light is determine…
intensity of light waves.
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two objects will attract one another when they have ___. ○ like charges…
opposite charges
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which aspect must be taken into consideration when creating a model of …
There must be a way for unstable nuclei to become stable nuclei.
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unit 7 physical interaction test sound waves produced by a vibrating ob…
compressional waves
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unit 7 \physical interaction\ test the amplitude of a compressional wav…
density of material in compressions and rarefactions
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unit 7 \physical interaction\ test the amplitude of a compressional wav…
density of material in compressions and rarefactions
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which of the following is a material through which charge cannot move e…
B. Insulator
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which option would be an appropriate model of nuclear fusion? (1 point)…
mashing two marshmallows together
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in order for the human body to make vitamin d, some exposure to what ki…
D. Ultraviolet waves
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which phrase describes radioactive decay? (1 point) the joining of smal…
the spontaneous emission of radiation
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choose the option that best matches the description given. is known as …
Paracelsus
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why does the emission of an alpha particle always result in transmutati…
The atom is converted to helium.
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what property of a wire increases when it is made thinner? ○ current ○ …
Resistance
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considering both sides of the equation representing a nuclear reaction,…
the total number of protons
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what property of a wire increases when it is made longer? charge. volta…
Resistance
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unit 7 \physical interaction\ test the si unit of frequency is the ____…
hertz
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9. given the position versus time graph below, draw corresponding veloc…
For problem 9: Sketch general - shape velocity and acceleration vs time graphs as described above. For problem 10a: FBD with $F_g$ down, $N$ up, $T$ up. For problem 10b: $N+T - mg…
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choose the option that best matches the job responsibilities given. an …
coroner
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from these experiments, thomson deduced that the beams were made up of …
Thomson discovered electrons and proposed an atomic model that was not universally accepted.
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which of the following correctly states the equation for calculating wa…
Wave Speed = Wave Length x Frequency
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7. which object has the greatest inertia? (1pt) a. a 10kg bicycle movin…
C. A 1000kg car at rest
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which statement does not describe how electric changes affect each othe…
Positive and negative charges repel
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identifying factors that affect erosion which conditions resulted in th…
high gradient, high velocity
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unit 7 \physical interaction\ test the magnetic field of a magnet is __…
B. strongest at the poles
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unit 7 \physical interaction\ test the aurora borealis is seen mainly _…
near the poles
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how did changing from a light drizzle to a downpour affect the river an…
The velocity of the river increased. There was more erosion in the stream. The type of sediment that moved changed.
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which of the following describes an object that is positively charged? …
has more protons than electrons
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particles in the solar wind react with ______ in the atmosphere to prod…
atoms
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the buildup of electric charges on an object is called a ____. current …
B. static charge
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unit 7 \physical interaction\ test the south pole of a magnet ______. r…
B. attracts a north pole
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throughout the reflection, make sure that you have the copy of the stud…
First blank: discharge Second blank: erosion (or sediment transport)
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directions: watch the youtube video called 30 minute full body soccer w…
2. The most challenging aspect for me was the high - intensity sprint intervals as they required a lot of energy and quick bursts of speed. 3. I enjoyed the dribbling drills the m…
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changing the current changes the ____ of an electromagnet. o direction.…
C. strength
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unit 7 \physical interaction\ test the shortest radio waves are called …
C. microwaves
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the region around a magnet where the magnetic forces act is the ____. ○…
B. magnetic field
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are representations of actual objects. a. symbols b. models c. handouts…
b. models
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date: 10/1/25 16. 68°f 17. 25°c 18. 52°f 19. 17°c 20. 9°c 21. 3°c 22. 4…
16. $20^{\circ}C$ 17. $77^{\circ}F$ 18. $11.1^{\circ}C$ 19. $62.6^{\circ}F$ 20. $48.2^{\circ}F$ 21. $37.4^{\circ}F$ 22. $6.7^{\circ}C$ 23. $91.1^{\circ}C$ 24. $8.3^{\circ}C$ 25. $…
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honors physics small group review problems instructions: work on each p…
1. a. Yes b. Zero 2. a. No b. Non - zero 3. a. FBD: Gravity downwards, normal force upwards b. \(\sum F_y=N - mg=0\) c. \(2.94\ N\) 4. \(5\ m/s\) 5. \(\frac{5}{6}\ m/s^2\approx0.8…
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how does the current in a circuit change if the voltage is doubled and …
doubles
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unit 7 \physical interaction\ test one example of a good conductor is _…
D. copper
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unit 7 \physical interaction\ test the steady flow of electrons through…
C. an electric current
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the electromagnetic waves with the highest energy are _. ultraviolet wa…
D. gamma rays
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unit 7 \physical interaction\ test how much of the energy emitted by th…
B. A small fraction
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theaters and concert halls often place curtains on the walls in order t…
absorb the energy of sound waves
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unit 7 \physical interaction\ test all of the following are transverse …
B. sound waves
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unit 7 \physical interaction\ test the intensity of light waves is a me…
energy carried by the waves
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unit 7 \physical interaction\ test what is the force between two electr…
B. Repulsive
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complex numbers unit test can a polynomial have four solutions but only…
Yes. Complex - valued solutions of a polynomial that come in conjugate pairs do not contribute to x - intercepts, so a polynomial can have four solutions (including complex ones) …
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a path created for a current that allows only one route for the current…
A. series circuit
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unit 7 \physical interaction\ test which of the following materials are…
Wood and Glass
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question 9 how do igneous rocks typically form? through the cooling and…
Through the cooling and solidification of magma or lava
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the rate at which an electrical device converts energy from one form to…
electrical power
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the process of detecting objects by bouncing sounds off them is called …
D. echolocation
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unit 7 \physical interaction\ test copper is used in household wiring b…
it has a low resistance
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question 8 1 pt which process moves sediment from one location to anoth…
D. Erosion
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what happens when two materials are charged by rubbing against each oth…
One loses electrons
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unit 7 \physical interaction\ test light travels fastest in ______. ○ s…
B. empty space
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unit 7 \physical interaction\ test sound intensity is measured in ___. …
A. decibels
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george is a newly hired forensic investigator out for his first real ca…
1. **For the case of 2nd instar blow - fly larvae**: - # Explanation: - ## Step1: Recall insect development timeline - Blow - fly larvae go through instars as they develop. The 2n…
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why would you use a model, instead of the actual object?
Models are more convenient, smaller, safer, less - expensive, and can simplify complex systems for understanding and experimentation.
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which of the following is true about the electric field around an elect…
It exerts a force on other charges
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unit 7 \physical interaction\ test resistance is measured in a unit cal…
D. ohm
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if the distance between the crest and trough of a wave is 1.2 m, the wa…
A. \(0.6\ m\)
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question 7 which process recycles rocks from one type to another over t…
D. Rock cycle
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unit 7 \physical interaction\ test as the frequency of a sound gets hig…
C. pitch
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electric companies usually sell electrical energy in units of _____. ○ …
kilowatt - hours
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why is it important to use color when preparing a presentation aid?
Color attracts attention, aids memory - organization, evokes emotions, and boosts engagement.
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which of the following is a device designed to open an overloaded circu…
Circuit Breaker
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question 6 1 pts which of the following is evidence that supports conti…
Matching fossils found on different continents
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question 23 (2.5 points) saved the performant path connects the entorhi…
True
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a current carrying wire wrapped around an iron ore is called a(n) ____.…
electromagnet
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question 5 1 pts what was alfred wegeners main idea about earths contin…
Continents were once joined and have drifted apart
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loudness is the human perception of sound wave ○ frequency. ○ intensity…
B. intensity
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question 4 during erosion, what happens to sediments? they are formed f…
They are moved to new places by natural forces
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the electromagnetic waves with the highest frequency are ____. microwav…
C. gamma rays
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name first & last janice khatera ff/m pd: 7/1 + 1 4 directions: create …
Response to prompt 1: Some jobs that require knowledge about fitness, health, and wellness are personal trainers and dietitians. I would choose to be a personal trainer. One reaso…
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4. a ball is thrown downwards at -3 m/s. how long does it take for the …
4. $t = 1\ s$ 5. The height of the cliff is $99.225\ m$ 6a. The displacement of the dart is $0\ m$ 6b. The initial velocity of the dart is $13.23\ m/s$
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question 9 of 10 which of the following was a major cause of the pelopo…
A. Dissatisfaction with Athens's growing empire
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the effects of studying on student test scores maggie conducted an expe…
1. The relationship indicated by the graph is a positive - linear relationship. As the time spent studying increases, the student test score increases. 2. Maggie could expect a sc…