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Q 1/184
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184 questions
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Which of the following units is used to measure work in the International System of Units (SI)?
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Which of the following is a necessary condition for scientific work to be done on an object?
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In which of the following scenarios is scientific work being done on the object?
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A person is carrying a heavy bucket of water while walking horizontally at a constant speed. Why is the work done by the person's lifting force on the bucket considered to be zero?
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A worker applies a constant force to push a crate across a warehouse floor. If the worker doubles the distance the crate is pushed while applying the same force, what happens to the amount of work done?
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A satellite orbits the Earth in a perfect circle at a constant speed. Even though gravity is pulling the satellite toward Earth, gravity does no work on the satellite. Why is this?
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Which of the following activities results in the most scientific work being done on an object?
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Which of the following describes a situation where the most power is being used?
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A mountain climber reaches the summit of a peak. If they want to calculate their total mechanical energy at the top, which two factors must they add together?
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If a construction crane lifts a heavy beam to the top of a building, but then holds it perfectly still at that height, which of the following is true regarding work according to the laws of physics?
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Which of the following is the most accurate definition of mechanical energy?
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An engineer wants to increase the power of a machine without changing the amount of work it performs. What should the engineer do?
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If you increase the distance an object is moved while applying the same amount of force, what happens to the amount of work done?
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Which of the following scenarios would result in an increase in the total mechanical energy of a moving object?
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If an electric motor is redesigned to lift the same elevator to the same height but in half the time, what happens to the work done and the power exerted?
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If a powerful engine and a weak engine both perform the same amount of work, what is the main difference between them?
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In the context of light reflection, what is the 'normal'?
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Which of the following describes the 'Reflected Ray'?
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If a light ray strikes a mirror perfectly perpendicular to the surface (along the normal), what will be the angle of reflection?
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Why does a piece of white paper not produce a clear mirror-like reflection, even though it follows the law that the angle of incidence equals the angle of reflection for every individual ray?
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Which of the following statements is true regarding a light ray hitting a flat mirror according to 'The Golden Laws' of reflection?
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If a light ray strikes a surface and the incident ray, the reflected ray, and the normal are all contained within the same flat surface, which of the 'Golden Laws' is being described?
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When a light ray reflects off a smooth mirror, which statement correctly applies the 'Golden Laws' regarding its path and the image formed?
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Imagine you are shining a flashlight onto a still pond at night. You see a clear reflection of the moon on the water's surface. Which of the 'Golden Laws' explains why the reflection is clear rather than blurry?
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When a ray of light travels from air into a glass block, which of the following best describes its movement?
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Which of the following describes the change in speed and direction as light moves from water into air?
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An incident ray of light passes from air into a pool of water. According to the Bending Rule, what happens to the path of the light?
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What happens to the speed and direction of a light ray as it moves from glass (a denser medium) into air (a rarer medium)?
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In a refraction diagram, if the light ray travels from a rarer medium to a denser medium, which angle is smaller?
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Which statement correctly describes how light behaves when it passes from a denser medium into a rarer medium?
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Which of the following occurs when a light ray enters a denser medium at an angle?
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Which of the following correctly describes the relationship between light speed and the 'Bending Rule' when light moves from air into water?
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Which of the following statements correctly describes what happens during the process of refraction?
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Which of the following is a key difference between reflection and refraction based on the media they involve?
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Which of the following optical tools relies on the property of refraction to function correctly?
120
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Which of the following mathematical equations represents the 'Key Law' for the property of refraction?
121
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Which specific property of light explains why a straw appears to be disconnected or broken when placed in a glass of water?
122
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In the context of light properties, which term refers to the action of light where it "bounces off" a surface and remains within the same medium?
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If you are studying an object that uses the property of light where rays 'Bend Through' and pass through two media, which mathematical relationship should you apply?
124
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Which property of light is characterized by the action of 'Bouncing Off' a surface and is commonly demonstrated by mirrors?
125
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What happens to light when it undergoes refraction while passing from air into water?
126
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In a hydroelectric power plant, what type of energy is stored in the water while it is behind a dam at a high elevation?
127
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What happens to the energy of water in a hydroelectric system as it flows downward from a high elevation?
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Which of the following describes why hydroelectric power is considered a renewable source of energy?
129
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Which component of a hydroelectric power plant is directly responsible for converting the kinetic energy of flowing water into mechanical energy?
130
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Which of the following best describes the energy transformation that occurs as water flows through a hydroelectric dam to produce electricity?
131
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If the height of a dam is increased, what happens to the gravitational potential energy of the stored water?
132
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Which of the following is a primary environmental benefit of using hydroelectric power compared to burning fossil fuels?
133
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Which of the following describes the relationship between the speed of the flowing water and the kinetic energy produced in a hydroelectric plant?
134
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In the context of hydroelectric power, what is the specific role of the generator?
135
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Which of the following determines the amount of gravitational potential energy available in a hydroelectric reservoir?
136
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In a Philippine hydroelectric facility like the Magat Dam in Isabela, what is the correct sequence of energy transformations that occurs to produce electricity?
137
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Which specific component in hydroelectric power plants, such as the San Roque Hydroelectric Power Plant, is directly responsible for the transformation of kinetic energy from falling water into mechanical energy?
138
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The Angat Hydroelectric Power Plant uses a generator to produce power. What specific energy transformation occurs within this generator?
139
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The San Roque Hydroelectric Power Plant and the Magat Dam in Isabela both store massive amounts of water behind a dam. What form of energy is possessed by the stationary water held at a high elevation before it is released?
140
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Which of the following describes the energy transformation that takes place specifically when water flows down from the Magat Dam to turn the blades of a turbine?
141
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In the context of Philippine hydroelectric plants like the Angat or San Roque dams, which stage represents the transformation from Kinetic Energy to Mechanical Energy?
142
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Which of the following describes the energy transformation that occurs as water moves from the reservoir to the spinning turbine in a hydroelectric plant like the Angat Dam?
143
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In the operation of the San Roque Hydroelectric Power Plant, what specific state of water represents the transformation into Kinetic Energy?
144
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Which part of a hydroelectric power plant is responsible for converting the mechanical energy of moving water into electricity?
145
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In a hydroelectric power plant, what is the name of the pipe or channel that carries high-pressure water from the reservoir down to the turbine?
146
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Which component of a hydroelectric power plant is directly responsible for rotating when it is hit by the force of moving water?
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Which component of a hydroelectric power plant is used to hold back a large body of water and regulate its release into the system?
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Which part of the hydroelectric power plant is used to carry the generated electricity over long distances to reach homes and businesses?
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What is the primary function of the reservoir in a hydroelectric power plant?
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Which of the following correctly describes the sequence of energy flow through the parts of a hydroelectric power plant?
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If a hydroelectric power plant needs to increase its electricity production by releasing stored water, which part of the system is adjusted to control this release?
152
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Which of the following parts is correctly matched with its function in a hydroelectric power plant?
153
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Which of the following describes the energy transformation that occurs specifically inside the Generator of a hydroelectric power plant?
154
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Which part of a dam is specifically designed as an internal room with drainage holes, used by engineers to monitor the structural operations of the dam?
155
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An engineer needs to identify the bottom part of the dam that directly touches the ground and faces the water reservoir. Which part is this?
156
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What is the name of the structure on a dam that acts as a safety valve by allowing excess water to flow safely downriver during a flood?
157
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The height difference between the normal water level in the reservoir and the maximum possible water level at the top of the dam is known as the:
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Which part of the dam refers to the very top surface that can be used as a walkway or a road for vehicles?
159
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If you are standing at the bottom of a dam on the side facing away from the reservoir (downstream), which specific part of the dam's base are you near?
160
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Which of the following describes the difference between the 'Toe' and the 'Heel' of a dam?
161
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Imagine a heavy rainstorm has caused the reservoir to reach its maximum capacity. Which structure is responsible for ensuring the excess water does not overflow the dam's top but instead reaches the downriver area safely?
162
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If a technician needs to conduct an internal inspection to check for leaks and use drainage holes to maintain the dam's stability, which part of the dam will they enter?
163
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Which of the following describes the 'Free Board' of a dam?
164
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While hydroelectric dams provide renewable energy, they can negatively impact the environment by trapping which of the following behind the dam wall?
165
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Which of the following is considered a primary economic and safety benefit of building a hydroelectric dam?
166
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Which of the following is a drawback of hydroelectric dams regarding their impact on aquatic ecosystems?
167
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Which statement best describes the environmental performance of hydroelectric dams compared to fossil fuel power plants?
168
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Which of these is a significant challenge for fish species, such as salmon, when a hydroelectric dam is constructed on a river?
169
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Hydroelectric dams are often praised for supporting economic development because they provide a constant source of power. Which type of energy category does this power belong to?
170
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Which of the following describes a dual benefit of hydroelectric dams that helps both local farmers and safety officials?
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Dams are effective at generating electricity while maintaining low air pollution. However, what is a major environmental consequence of a dam trapping nutrients and sediments in its reservoir?
172
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Which of these is a long-term benefit of hydroelectric dams regarding the global atmosphere?
173
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Hydropower is considered a 'sustainable' energy source primarily because it relies on which natural process?
174
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Which of the following best summarizes the challenge humans face when utilizing hydroelectric power generated from falling water?
175
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In a hydroelectric power system, how is the energy stored in a reservoir transformed into electricity?
176
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Which concept best describes the ethical responsibility of managing and protecting the natural resources used in hydroelectric power production?
177
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Which of the following describes the energy transformation that occurs when water is held behind a dam before it is released to generate power?
178
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Which of the following statements best illustrates the principle of stewardship as it relates to hydroelectric energy?
179
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When considering the impact of dams on the environment, what is the most important factor humans must manage to practice responsible stewardship of natural resources?
180
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Which statement best describes the fundamental trade-off involved in the use of hydroelectric dams?
181
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Which of the following scenarios best demonstrates the concept of 'potential energy' in a hydroelectric system?
182
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If a community decides to build a dam to provide clean electricity while also creating a protected fish ladder to help salmon migrate, which 'Key Takeaway' are they most directly practicing?
183
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Which of the following is a direct application of using natural resources responsibly in the context of hydroelectric power?
