物理
力学、受力分析、電気、式を使った解法。
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53. boxes of various masses are on a friction-free level table. rank ea…
### Part (a): Ranking Net Forces # Explanation: ## Step 1: Calculate Net Force for A Net force is the vector sum of forces. For box A, forces are 5 N left and 10 N right. So net f…
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the ____ curve represents wave motion. answer options: select one of fo…
D. sine (assuming the options are labeled A to D as hyperbolic, tangential, parabolic, sine respectively)
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exam lesson name: states of matter exam number: 700698rr ▶ exam guideli…
B. clouds.
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exam lesson name: states of matter exam number: 700698rr ▶ exam guideli…
C. 214 kPa
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exam lesson name: states of matter exam number: 700698rr exam guideline…
D. 1.52 g/cm³
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exam lesson name: states of matter exam number: 700698rr ▶ exam guideli…
D. thermal expansion/contraction
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exam lesson name: states of matter exam number: 700698rr ▶ exam guideli…
C. 0.225 kPa
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exam lesson name: states of matter exam number: 700698rr ▶ exam guideli…
B. less
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exam lesson name: states of matter exam number: 700698rr exam guideline…
D. Solid
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exam lesson name: states of matter exam number: 700698rr exam guideline…
C. Hydraulic press
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exam lesson name: states of matter exam number: 700698rr exam guideline…
D. 18.8 g/cm³
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exam lesson name: states of matter exam number: 700698rr ▶ exam guideli…
D. using refrigerant to transfer heat from the outside air to inside the building.
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the heat absorbed or lost by a substance changing state while staying a…
latent
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writers of the renaissance introduction drag and drop each characterist…
- Miguel de Cervantes: wrote Don Quixote, was born and lived in Spain, used multiple narrators, contrasted hero, antihero - Dante Alighieri: wrote The Divine Comedy, explored life…
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which of these can cool air in summer, heat air in winter, and control …
Heat pump
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which of these can cool air in summer, heat air in winter, and control …
Heat pump
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if the boiling point of a substance is 89 °c, whats its condensation po…
D. \( 89^\circ \text{C} \) (assuming the options are labeled A: \( 98^\circ \text{C} \), B: \( 189^\circ \text{C} \), C: \( 87^\circ \text{C} \), D: \( 89^\circ \text{C} \))
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the pressure on a liquid that does not include atmospheric pressure is …
gauge
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one ____ is the pressure of one newton on one square meter (m²). answer…
pascal
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which of the following is not an insulator? answer options: select one …
B. Silver
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if a liquid has a free surface, how can you calculate the pressure at a…
C. \( p = hdg \) (assuming the third option is labeled C; if the original options had labels like A, B, C, D with the third being \( p = hdg \), then the answer is the option with…
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whenever the pressure in a confined liquid is increased or decreased, t…
A. Pascal's principle
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as they gain heat energy and their temperatures increase, objects tend …
B. expand (assuming the options are labeled as A: expand if they're liquids or gases, B: expand, C: contract, D: contract if they're liquids or gases)
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whats the mass of an object with a density of 19 g/ml and a volume of 3…
57 g (corresponding to the option with "57 g")
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which of the following correctly orders substances from least dense to …
B. Ice, liquid water, aluminum ball (assuming the second option is labeled B; if options are labeled differently, adjust the identifier but keep the text: "Ice, liquid water, alum…
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whats the density of an object with a mass of 70 kilograms (kg) and a v…
5.8 kg/L
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if two objects have identical volumes but different masses, then the ob…
will have lower density.
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exam lesson name: energy conversions exam number: 700697rr exam guideli…
A. 278 K
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exam lesson name: energy conversions exam number: 700697rr exam guideli…
B. 214.4 J
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exam lesson name: energy conversions exam number: 700697rr ▶ exam guide…
D. convection
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exam lesson name: energy conversions exam number: 700697rr ▶ exam guide…
B. 5,488 J
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exam lesson name: energy conversions exam number: 700697rr exam guideli…
C. 305,760 J
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question 12 of 20 : select the best answer for the question. 12. whats …
A. 54.3 Btus
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exam lesson name: energy conversions exam number: 700697rr ▶ exam guide…
A. hydroelectric energy.
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exam lesson name: energy conversions exam number: 700697rr ▶ exam guide…
C. $93.3^\circ$C
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exam lesson name: energy conversions exam number: 700697rr ▶ exam guide…
D. energy can't be created nor destroyed, just transformed.
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exam lesson name: energy conversions exam number: 700697rr exam guideli…
B. Friction
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exam lesson name: energy conversions exam number: 700697rr exam guideli…
D. \(68^{\circ}F\)
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exam lesson name: energy conversions exam number: 700697rr ▶ exam guide…
A. Friction converts some energy into a useless form.
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exam lesson name: energy conversions exam number: 700697rr exam guideli…
B. $15^{\circ}\text{C}$
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exam lesson name: energy conversions exam number: 700697rr ▶ exam guide…
A. 352J
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in any jet-propelled vehicle, the thrust that propels it forward is cre…
backward
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the ____ of four-cycle diesel engines makes them more powerful and more…
high compression
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among the following, which is the correct sequence of stages for engine…
B. Intake, compression, power, and exhaust (assuming the options are labeled A, B, C, D with A: Exhaust, intake, compression, and power; B: Intake, compression, power, and exhaust…
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two forms of mechanical energy are gravitational ____ energy and kineti…
potential
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one ____ of power is exerted when the work of one joule is performed du…
watt
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a student is pushing a box across the room. to push the box three times…
Three times as much
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how much horsepower (hp) is required to lift a 50-kilogram mass to a he…
1.3132 hp
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on the fahrenheit scale, the freezing point of water is designated as _…
32
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suppose you rub two surfaces together or strike a piece of metal with a…
mechanical
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a celsius thermometer indicates a temperature of 20 °c. whats the equiv…
68 °F
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____ energy is the conversion of mechanical energy from moving water to…
Hydroelectric
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the law of _____ states that energy cant be created or destroyed, only …
D. conservation of energy
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when taking a hot pan off the stove, you would likely use thick gloves …
B. Conduction
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____ energy sources are formed by geologic processes acting over millio…
D. Nonrenewable, renewable
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what type of energy does a cheetah have when its running along the grou…
B. Kinetic mechanical energy
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
D. 6.67 m/s
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exam lesson name: motion and forces exam number: 700696rr exam guidelin…
B. 34.78 m/s
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exam lesson name: motion and forces exam number: 700696rr exam guidelin…
B. 60 km/hour
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
C. 35 kg
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
C. 75 kg - m/s
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force acting upon a charged particle kept between the plates of a charg…
2) \( \frac{F}{2} \)
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
B. The circular orbits of the Copernican model weren't correct. Paths of the planets were elliptical.
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exam lesson name: motion and force exam number: 700696rr ▶ exam guideli…
B. Magnitude
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exam lesson name: motion and forces exam number: 700696rr exam guidelin…
C. Gravitation force
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
D. center - seeking.
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exam lesson name: motion and forces exam number: 700696rr exam guidelin…
C. As the distance between any two bodies increases, the gravitational force between them decreases.
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question 9 of 20 : select the best answer for the question. 9. a person…
A. 30 kg - m/s
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
C. Kilograms
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
D. 150 kg-m/s
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
A. If an object's velocity is changing, it's experiencing either acceleration or deceleration.
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
D. The SI system, which is based on the metric system, has been more widely adopted than the English system, which is harder to use.
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exam lesson name: motion and forces exam number: 700696rr exam guidelin…
B. Central - force motion
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exam lesson name: motion and forces exam number: 700696rr ▶ exam guidel…
B. 10.
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exam lesson name: motion and forces exam number: 700696rr exam guidelin…
B. 7,200 kg - m/s
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exam lesson name: motion and forces exam number: 700696rr exam guidelin…
B. Mass and acceleration
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in a game of pool, when one ball hits another and sets it into motion, …
elastic
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when two objects collide and stick together, what happens to their spee…
The objects will slow down after they collide.
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a truck that weighs 1,000 kg is traveling 5 m/s. how would momentum be …
It would take more brake power to slow the truck to a stop.
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which of the following would decrease momentum? answer options: select …
D. Decreasing mass
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which of the following is the equation for calculating momentum of an o…
\( p = mv \) (assuming this is one of the options, likely the bottom - left option as per the formatting in the question)
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the gravitational force that keeps the moon in orbit is a kind of ____ …
centripetal
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friction always works ____ the direction of velocity.
opposite to
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when two objects with very different masses are attracted by gravity, t…
B. The larger object has much more inertia.
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kepler’s observations of the solar system would have made more sense if…
elliptical
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what allows cars to travel on a racetrack at very high speeds without s…
Angle of the bank incline
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____is a measure of inertia, or a measure of a bodys resistance to chan…
mass
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on: oil is used between two facing surfaces, such as pistons and cylind…
friction
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imperialism in africa, india, japan, and latin ameri answer the followi…
d. A and C.
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a scalar is a quantity consisting of a single real number and is used t…
magnitude.
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if a man is standing in a moving bus that then slows down, what causes …
Inertia
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whats newtons first law of motion also called? answer options: select o…
A. Law of inertia
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1. in regards to r.a.c.e., it is more important to try to extinguish a …
False ### Question 2
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a/an _____ registers the total distance traveled by a vehicle.
odometer
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you’ve walked into the break room at work and the coffee pot has caught…
To solve the problem of arranging the steps in case of a fire in the break room, we follow the standard fire safety protocol: ### Step 1: Alert Others First, we need to alert othe…
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acceleration occurs when the ____ of a body changes.
velocity
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you’ve walked into the break room at work and the coffee pot has caught…
To solve the problem of arranging the steps for a fire in the break room, we follow the principles of fire safety: ### Step 1: Warn others First, alert people around you ("Warn ot…
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whats the only force on a free-falling body? answer options: select one…
D. Gravity (assuming the options are labeled A - D as Friction, A push from being thrown, Tension, Gravity respectively)
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whats the speed at a particular moment in time called? answer options: …
B. Instantaneous speed (assuming the options are labeled A: Variable speed, B: Instantaneous speed, C: Uniform speed, D: Constant speed; if labels differ, adjust to match the corr…
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what is the phenomenon of stealing information to benefit one’s own cou…
Cyber espionage