物理
運動學、受力分析、電學與方程推導。
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the range r and the maximum height h of a projectile fired at an inclin…
A. \(R\approx698.76\) feet B. \(H\approx174.7\) feet
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the most common type of malignancy of the esophagus in the u.s. most of…
Adenocarcinoma
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the condition of the esophagus that is produced by metaplasia of the es…
Barrett's esophagus
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centrilobular emphysema is caused by which of the following? farmers lu…
C. Cigarette smoking
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question 1 (mandatory) (10 points) listen a patient is found to have ch…
A. Kartagener's syndrome
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the range r and the maximum height h of a projectile fired at an angle …
\(700.00\)
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abrupt changes in water temperatures associated with power plant water …
thermal shock
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which of the following is a moving system? a puddle a pond a pool a str…
a stream
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at what temperature is water most dense? 20 degrees celsius 50 degrees …
4 degrees Celsius
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the range r and the maximum height h of a projectile fired at an inclin…
\(700.00\)
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a package is on a ramp that is inclined 32° to the horizontal, as shown…
(a) \(187.20\space N\) (b) \(220.80\space N\)
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a brick is placed on a ramp that is inclined 24° to the horizontal, as …
(a) \(5.79\space N\) (b) \(14.23\space N\)
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the range r and the maximum height h of a projectile fired at an inclin…
\(R\approx700.0\) feet, \(H\approx174.7\) feet
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a skateboard weighing 29 n, represented by force g, lies on a hill that…
(a) \(15.79\space N\) (b) \(24.32\space N\)
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what part of a car will reduce noise from the vehicle? air conditioner …
the muffler
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how does noise pollution affect communication in humans? it can disrupt…
It can disrupt and make communication difficult.
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what is the main focus of the primary standard for critical air polluta…
ensuring human health
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what are the two types of standards established for critical pollutants…
primary and secondary standards
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how can radon gas commonly enter a home, posing a risk to the occupants…
seeping through cracks in the foundation
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why is it important to monitor and control indoor air quality? to impro…
to reduce the risk of chronic health issues
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how does increased vegetation typically impact urban temperatures? it l…
It lowers temperatures by absorbing heat.
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what is a key strategy for mitigating heat islands? expanding the use o…
green spaces, trees, and green building features
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the effects of acid deposition usually appear over what time period? wi…
very slowly over years
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select all the adjectives. dont include a, an, or the. ernesto de la cr…
huge, forceful
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the diagram shows a spectrometer being used to analyze a sample of a so…
X
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the diagram shows a spherical wave. which letter represents a wavelet? …
Y
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the distance between slits on a diffraction grating is 0.60 mm, and one…
C. 3142 nm
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hilda looks at a cd and sees different colors. which best explains why …
Different wavelengths of light bend at different angles.
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what is the approximate wavelength of a light whose second - order dark…
C. 414 nm
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lexy and jin study the diagram shown. which best explains who is correc…
Lexy is correct because angle R is between the incident wave, \(n = 0\), and a diffracted wave.
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which is the destructive interference formula for diffraction grating p…
\(d\sin\theta=(n +\frac{1}{2})\lambda\) (the first option).
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current attempt in progress an object on a spring is oscillating in sim…
damped harmonic motion
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current attempt in progress five simple pendulums are shown in the draw…
B
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current attempt in progress the kinetic energy of an object attached to…
A and B
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drag the missing word into place talc is one of the softest minerals. t…
property
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question 14 1 pts what term refers to a common cut that can make a carr…
C. julienne
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drag the right word to its definition formula mineral luster a substanc…
mineral
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question 13 1 pts what kind of dice is not to be confused with mincing,…
C. brunoise dice
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drag the right word to its definition a substance that is found natural…
mineral
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the diagram shows the forces exerted on an object. which of the followi…
C. To the left only, because the vertical components of the forces are balanced, but the horizontal components are not balanced.
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drag the missing word into place then, well describe how a mineral brea…
cleavage
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drag the right word to its definition the appearance of the freshly bro…
fracture
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a skydiver is falling through the air attached to a parachute. the mass…
C. \(\sqrt{\frac{mg}{A}}\)
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a string of negligible mass is attached to a box of mass m. with the st…
D. \(F_T = mg - F_N\)
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question 7 1 pts only a(n) ____ can hone a blade to its sharpest possib…
Question 7: fine - grained stone Question 8: bear claw
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question 5 1 pts both the appearance and cooïring times of food items a…
Question 5: cut Question 6: True
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a puck slides freely across the horizontal surface of a frozen pond wit…
D. The puck will slide with a constant velocity.
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question 4 1 pts shana is using one of her favorite knives to peel some…
paring knife
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question 2 1 pts keeping your knives sharp gives you more control, prov…
True
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sedimentary rocks begin forming when existing rocks are worn away by wi…
C. Small shells being moved by water to the shore.
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question 1 slicing like a pro means using two hands, one on the knife a…
True
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2. name three properties you could use to distinguish a proton from an …
Mass, Charge, Location.
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there are three types of rocks on earth. each rock type forms in a diff…
A. Lava and magma are both types of molten rock.
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at the instant shown, a paper airplane is moving horizontally to the ri…
D. Decreasing, Increasing downward
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two applied forces are exerted on a box that slides along a flat surfac…
D. The velocity of the box changes because the sum of the horizontal components of the forces no longer equals zero.
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1c. in your own words, describe the characteristics of the three types …
Igneous rocks form from cooled magma/lava with a crystalline texture (e.g., granite, basalt). Sedimentary rocks form from sediment compaction/cementation, often layered (e.g., san…
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1a. which of the following is not a type of rock? choose an option a ig…
D. Fossil
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drag over the word that goes best with the image mineral erosion fossil
mineral
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a person holds a string that is attached to a box. the person allows th…
C. The tension must be equal to \(5N\)
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drag the missing word into place depending on where they get deposited,…
metamorphic
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drag over the word that goes best with the image
sedimentary
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drag the right word to its definition formed by extreme heat or pressur…
metamorphic
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an astronaut jumps from the surface of the moon and follows the path sh…
D. No, because there is a downward net force on the astronaut.
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drag the right word to its definition molten rock that erupts from a vo…
lava
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sitting outside for years will the wooden deck chairs so they become sm…
weather
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war in iraq and the fight against terror qu answer the following questi…
B. The U.S. had to scale down its operations even going door to door and patrolling individual streets.
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drag the right word to its definition formed by a volcano or the solidi…
igneous
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a person of mass 90 kg stands on a scale in an elevator. the scale read…
D. The elevator could possibly be moving downward and slowing down.
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the wind and rain brought into the river. over time, that material may …
sediment
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drag the right word to its definition hot, molten rock below the earth’…
magma
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a person exerts a force ( f_p ) on a rope to pull a block of mass ( m )…
B. \(\frac{F_p\cos\theta_2 - F_f}{m}-g\sin\theta_1\)
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drag the missing word into place sandstone is one type of rock, as you …
sedimentary
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drag the right word to its definition the movement of small pieces of r…
erosion
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crate 1 of mass ( m_1 ) is connected to crate 2 of mass ( m_2 ) by a st…
B. \(a_{1}=\frac{f_{1}}{m_{1}}\) and \(a_{cm}=\frac{F - f_{1}-f_{2}}{m_{1}+m_{2}}\)
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drag the missing word into place theres three different types, let me s…
igneous
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drag the missing word into place during a strong storm, piece of land b…
erosion
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a 60 kg person is riding in an elevator. at time ( t_1 ), the elevator …
A. \(2:3\)
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drag the right word to its definition a substance that is found natural…
mineral
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drag the missing word into place means the wearing down weathering igne…
Weathering
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a system consists of two identical blocks connected by a rod of negligi…
D. There is a net force exerted on the system directed to the right.
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drag the missing word into place deep below earths solid surface, is fl…
magma
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at time ( t = 0 ), a car is traveling on a straight, level road and the…
C.
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note: forces not drawn to scale. a box of mass ( m ) slides along a hor…
B. \(\frac{F_{T}(1-\cos\theta)}{M}\)
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two stars in deep space are very far from any other objects. the two st…
B. The center of mass does not accelerate.
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a spacecraft in deep space fires its thruster, which ejects fuel from t…
A.
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10. a. wave length b. height c. crest d. amplitude e. kinetic energy fl…
D. amplitude
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9. there are two main types of waves, a. mechanical waves b. electromag…
True
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8. highest point of a wave. 1 pts. a. trough b. height c. crest d. peak…
C. crest
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7. distance between 2 successive crests of a wave or between 2 successi…
C. wavelength
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diorite is a rock with crystals. it can form when molten lava cools dow…
A. Igneous
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question(s) 6 of 10. 6. the lowest part of a wave 1 pts. a. crest b. tr…
B. trough
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which of the following would be a clue that a rock is metamorphic? choo…
D. It has ribbon - like layers, or bands.
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5. mechanical waves can travel through space. 1 pts. true false flag th…
False
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which of the following would be a clue that a rock is sedimentary? choo…
B. It has small particles stuck together.
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which of the following would be a clue that a rock is igneous? choose o…
A. It has crystals.
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choose all that apply mark all that apply. which of the following are p…
A. X - rays, B. Visible light, C. Gamma rays, D. Ultraviolet light, E. Infrared light
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quiz question 3 of 10 immersive reader which type of rock forms through…
B. Sedimentary
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3. all electromagnetic waves travel at the speed of light (186,000 mile…
True
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coach roberts has a device that launches baseballs into the air so the …
\(1.3,6.2\)
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2. the number of wave cycles completed in 1 second. 1 pts. a. hertz b. …
B. frequency