High School Physics Exam Questions & Answers 2024, Exams of Nursing

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QUESTION & ANSWERS 2024

Where do you find nuclear forces? - Correct Answers ✅ in between nucleons Which of the following statements is false about strong and weak nuclear forces? - Correct Answers ✅ both promote beta decay The gravitational force on Earth due to the sun points from Earth's center toward the sun's center. The gravitational force on the sun due to Earth has ________ as the sun's gravitational force on Earth. - Correct Answers ✅ the same magnitude but opposite direction Suppose a uniform gravitational field contains a collection of masses. What happens to the center of mass and center of gravity if you double the mass of one of the objects in the field that is located at the center of mass? - Correct Answers ✅ Neither the center of mass nor the center of gravity moves. A friend claims that a standard way to create plasma is to cool a liquid mixture of atoms until they combine into larger clumps. What is wrong with this statement? - Correct Answers ✅ Plasmas can be created by heating gases until their atoms become ionized. A baseball falling from the top of a skyscraper accelerates downward at what rate? - Correct Answers ✅ 9.8m/s

QUESTION & ANSWERS 2024

Two billiard balls have a collision on a billiard table. Which of the following is NOT true about the forces they exert on each other? - Correct Answers ✅ The force each ball experiences during the collision is caused when the atoms of one ball come into physical contact with the atoms of the other ball. As the distance between two charged particles increases, the force between them ____________. - Correct Answers ✅ decreases If a positively charged object was brought near a negatively charged object, what would happen? - Correct Answers ✅ they would attract Common forces often known as "contact forces" (such as a person's hand pushing a chair) are actually not caused by contact but rather are primarily the result of _____________ acting at a distance. - Correct Answers ✅ the electric force An ideal satellite without a propulsion system orbits a perfectly spherical, uniformly dense planet at a constant altitude and speed. Neglecting friction, why does it never speed up or slow down? - Correct Answers ✅ gravity, the only force acting on it, acts perpendicular to its velocity Which could be a description of this vector? - Correct Answers ✅ an acceleration acting at 45°

QUESTION & ANSWERS 2024

Which of the following is a vector quantity? - Correct Answers ✅ a velocity of 2 m/s to the left A train travels at a constant speed of 72 km/h between two towns that are 120 miles apart. How long does it take the train to travel this distance? - Correct Answers ✅ 2.7 h A velocity's magnitude may be changed without changing its direction by - Correct Answers ✅ applying a force parallel to its direction When a cannonball is fired out of a cannon, the cannonball reaches much greater speeds than the cannon does as it recoils. Which of the following is an accurate explanation of this? - Correct Answers ✅ The explosion inside the cannon produced the same force on both objects, but the masses of the objects are different. A person drives for 1.00 h at 10.0 km/h and 2.00 h at 20.0 km/h. What is their average speed, in SI units? - Correct Answers ✅ 4.63 m/s A car moves at a constant velocity for 10 s, slows down for the next 5 s, and then again moves at a constant velocity for another 10 s. Which of the following must be true? (Assume the car does not change direction during these 25 s.) - Correct Answers ✅ At 20 seconds since the car is moving at a constant velocity again the instantaneous is the same as

QUESTION & ANSWERS 2024

the average velocity. So, at 20 seconds the average velocity is neither greater or less than 20. (none) Four students walk home from school. Tom walks for 25 min at a speed of 5.0 km/h. Juan walks for 22 min at at a speed of 4.2 km/h. Alicia walks for 32 min at a speed of 4.5 km/h. Petra walks for 40 min at a speed of 3.5 km/h. Which student walks the farthest? - Correct Answers ✅ Petra or alicia A car is traveling down the road. Some of the forces acting on the car are shown in the diagram below. Based on the directions of the forces, what force is missing from the diagram? - Correct Answers ✅ normal force Which of the following is an example of an object with a momentum of magnitude 42 kg m/s? - Correct Answers ✅ A 7.8 kg brick falling at 5. m/s. Coal and other fossil fuels are considered to be "nonrenewable" sources of energy. How does the use of nonrenewable fuels affect the total energy of the universe? - Correct Answers ✅ Although the total energy remains constant, nonrenewable fuels convert chemical energy into forms that are difficult or impossible to use again.

QUESTION & ANSWERS 2024

A student is replicating Joule's paddle wheel demonstration. After a successful test, she varies the experiment by increasing the mass of the masses. Assuming the apparatus continues to function well, how will the second experiment compare with the first? - Correct Answers ✅ The change in the water temperature will be greater. Two objects of equal mass undergo an elastic collision. Before the collision, One object is moving with speed ( - Correct Answers ✅ V A child throws a ball up into the air and then catches it when it comes down. What is the effect on the ball's potential energy? - Correct Answers ✅ Potential energy increases, then decreases to the original level. You connect two pieces of wire to the terminals of a battery and touch the other ends to a conducting piece of aluminum. Predict what happens to the current through the conductor. - Correct Answers ✅ some charges flow Two particles of equal charge move through a magnetic field at the same speed. One passes through the magnetic field at an angle of 45° with the field. The other passes through the magnetic field at an angle of 55° with the field. Which of the following statements is true? - Correct Answers ✅ The magnitude of the second particle's force will be greater than the magnitude of the first particle's force.

QUESTION & ANSWERS 2024

An ohmmeter is a common device for measuring resistance. Using an ohmmeter, you find that a certain material has a very high resistance. This material is most likely what? - Correct Answers ✅ insulator The conductivity of semiconductors is usually what compared to conductors and insulators? - Correct Answers ✅ in between Summarize the effect of a varying magnetic field on the electrons in a conductor. - Correct Answers ✅ electrons in the conductor feel a force A student is playing an online physics simulation game. The goal of the game is to create a combined electric field with a group of charged particles, such that a moving positive test charge is guided through the field to a certain location. Of the following, which is LEAST LIKELY to be an effective way to adjust the combined electric field to achieve the game's goal? - Correct Answers ✅ doubling the charge strengths of the test charge and guiding particles Which of the following is approximately equivalent in length to the wavelength of a microwave? - Correct Answers ✅ thickness of paper A person sitting on a bus traveling at a high speed with the windows down is holding a cell phone that is set to ring every second. If the bus passes a second person, standing still on the sidewalk, what will the

QUESTION & ANSWERS 2024

second person notice about the cell phone ringing as the bus passes? - Correct Answers ✅ The phone appears to ring less frequently. A music performance takes place in an enclosed arena. A person sitting a distance of 20.0 m from the speaker experiences a sound intensity of 0.32 W/m2. What is the power of the speaker? (Assume that the area over which the speaker transmits sound is given by - Correct Answers ✅ 1600W What is the main difference between a real and a virtual image? - Correct Answers ✅ A real image is formed with actual light rays, while a virtual image is not. A mass on a horizontal spring is displaced 6 cm to the left of its equilibrium position. In which direction does the acceleration vector point? - Correct Answers ✅ right A scientist is performing an experiment to observe the properties of light waves. She shines a light beam through a sealed chamber and observes the beam. Then, she pumps all the air out of a chamber to create a vacuum inside. She shines the light beam through the chamber again. What will she observe? - Correct Answers ✅ The light beam shines in the vacuum chamber just as it did through the chamber with air.

QUESTION & ANSWERS 2024

If the base units for joules are kg×m2/s2, what is an alternative unit for the latent heat of vaporization? - Correct Answers ✅ m2/s How much energy is required to raise 1 g of water from 298 to 311 K? - Correct Answers ✅ 13 cal In laser plastic welding, a laser beam shines down through a transparent plastic part to an opaque plastic part. The opaque plastic absorbs the energy and becomes hot, melting the two parts together. The process works best when the parts are clamped tightly together, so that the thermal energy can move between the parts by - Correct Answers ✅ conduction A certain theoretical process runs backward from its endpoint and returns to its starting point with no change in the system or its surroundings. The net change in entropy is - Correct Answers ✅ zero 5.21 calories is the equivalent to - Correct Answers ✅ 21.8 J of energy Decay rates are useful when dealing with large samples. Why would the decay rate of a particular isotope be difficult to use accurately for a very small sample? - Correct Answers ✅ The decay rate is an average rate that cannot predict exactly when atoms decay.

QUESTION & ANSWERS 2024

Crude oil contains a mix of different hydrocarbons. To separate the hydrocarbons, the crude oil is fed into a tall hollow column that is hotter toward the bottom and cooler toward the top. Most of the crude oil vaporizes at the bottom. As it rises, it cools. Each kind of hydrocarbon condenses at a different temperature level and is drawn off. Longer chain hydrocarbons such as fuel oil have higher boiling points than shorter chain hydrocarbons. Which hydrocarbon is most likely to be drawn from the upper levels of the column? - Correct Answers ✅ C2H What situation most causes an atom to be chemically inert? - Correct Answers ✅ having no incomplete electron shells Hydrogen atoms have only one electron to share, and have a filled valence shell with two. So, they often bond with carbon. According to this Lewis dot structure for methane (CH4), how many valence electrons does carbon have to contribute to forming the molecule? - Correct Answers ✅ 4 Potassium oxide (K2O) is held together by an ionic bond. To begin with, the oxygen atom is two electrons short of a stable electron configuration. In the ionic bond, what is the charge on each potassium ion? - Correct Answers ✅ + Two different substances, A and B, that are suspected to be catalysts are added to chemical reactions 1 and 2 and the reactions occur at room temperature. Reaction 1 takes 1 minute and Reaction 2 takes 2

QUESTION & ANSWERS 2024

minutes. The reactions are run again at 0°C without the substances this time. Reaction 1 takes 4 minutes and Reaction 2 still takes 2 minutes. Which of the following is true about substances A and B? - Correct Answers ✅ It cannot be determined whether either substance is a catalyst from this experiment. A particular chemical reaction completes in roughly 2 minutes and 20 seconds at a temperature of 30°C. If the same chemical reaction is run again at 20°C, the reaction takes 2 minutes and 50 seconds. If this trend is assumed to continue in a linear manner, estimate the time of the reaction at 15°C. - Correct Answers ✅ 3 minutes and 5 seconds The fact that catalysts are not consumed in a reaction has which of the following implications? - Correct Answers ✅ A small amount of catalyst can catalyze a large amount of the reactants.