Physics Homework Answers & Questions Page 49

• A 4 g air-rifle pellets is fired into a target block attached to a glider. The block and glider total mass is 0.5 kg. The target slides along the track a distance 1.455 m. The track is inclined 10 degree. Determine pellet velocity from air rifle?

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• How does length of a string affect its frequency? Thanks

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• Is a parallel circuit better than a series circuit?

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• Why is diffraction grating more accurate than double slits to measure the wavelength of light?

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• What are some examples of net forces?

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• What is the SI unit of electric field?

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• An astronaut has a mass of 100 kg and has a weight of 370 N on Mars. What is the gravitational strength on Mars?

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• What is the difference between speed and velocity and acceleration?

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• What is an example of an energy transformation from electrical to sound energy?

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• How do you draw a converging lens ray diagram?

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• How is the conservation of momentum related to Newton's third law?

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• What are the criteria for a total internal reflection to occur?

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• The resistence of a conductor 5 ohm-what does it means?

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• What is the mathematical expression of Newton's law of gravitation?

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• Why do falling objects reach a terminal velocity?

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• What is an advantage of using an electromagnet rather than a regular magnet?

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• How is the acceleration of a moving object determined?

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• What is the difference between gravitational force and weight?

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• How do sound waves transfer energy?

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• A satellite is placed in equatorial orbit above Mars, which has a radius of 3397km and a mass M=6.4x10^23 kg. The mission of the satellite is to observe the Martian climate from an altitude of 488km. What is the orbital period of the satellite?

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• How do you express 12 km/L in miles/gal?

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• What does velocity mean in motions graphs?

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• Name two advantages of relative density over density in measurement?

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• If an object has a mass of 50 kg, what is its weight?

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• Suppose you connect a battery to a small light bulb with a single wire. What will happen?

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• Sheila can ride her bicycle 6000 meters in 15 minutes. How far can she ride her bicycle in 2 minutes?

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• How does current change for resistors in series?

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• Why is the Newton's second law called the equation law?

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• What was wrong with Rutherford's model of the atom?

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• How does acceleration affect tension?

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• What is diffraction of light?

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• How do i convert 1.2kg /m3 into g /cm3?

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• What is the difference between a Joule (J) and an electron volt (eV)?

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• If linear momentum is increased by 50% then how much will the kinetic energy increase by, and why?

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• The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 66 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon?

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• What is magnetism?

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• What is the acceleration due to gravity on the surface of a planet that has twice the mass of the Earth and half its radius?

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• What does it mean to say the Kepler's laws are empirical in nature?

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• The force exerted by the floor of an elevator on the foot of a person standing there ,is more than his weight if the elevator is: a-going up and speeding down b-going down and slowing down c-going up and speeding up d-both b and c?

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• Jason can travel 24##3/4## miles in ##1/2## an hour. What is his average speed in miles per hour?

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• How does nuclear decay affect the atomic number and mass number?

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• The index of refraction for water is 1.33 and for glass it is 1.52. What happens to the speed of light when light travels from water into glass?

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• A block with initial velocity of 3 m/s slides 9 m across a rough horizontal surface before coming to rest. What is the coefficient of kinetic friction?

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• How can physics help engineers?

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• What is the purpose of a capacitor?

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• Why are standardized units of measurement important?

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• How was Coulomb's law equation created?

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• Why does the nucleus of an atom have a positive charge?

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• What does it mean if a lever is at a mechanical disadvantage?

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• Is pressure a vector, scalar or tensor quantity. Why?

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