Physics Homework Answers & Questions Page 49

• 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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• What is a strait motion .. what is refrence point,origin,frame of refrence?

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• Find the length of an arc with a radius of 10.0 m swept across 100 degrees?

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• How can i calculate orbital angular momentum of an electron?

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• What is the difference between constructive and destructive interference?

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• What is the relationship between Balanced Force and Net Force?

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• What does the first law of reflection state?

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• An object is traveling around a circle with a radius of 2 meters. If in 20 seconds the object travels 5 meters, what is its angular speed? What is its linear speed?

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• What is the frequency in hertz of blue light having a wavelength of 425 nm?

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• Why is the force = mass * acceleration rather than mass * velocity? Isn't the force exerted at a given moment rather than over a period of time, which is expressed through acceleration?

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• Which of the following is a correct statement of the Second Law of Thermodynamics?

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• What is a divergent mirror?

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• What is Stefan Boltzmann law used for?

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• What is emf?

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• A motorboat accelerates uniformly from a velocity of ##6.5## ##m####/####s## to the west to a velocity of ##1.5## ##m####/####s## to the west. If its acceleration was ##2.7## ##m####/####s^2## to the east, how far did it travel during the acceleration?

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• What simple machines are in a bicycle?

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• Define the term specific heat capacity of a substance and give its SI units ?

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• How does air resistance affect the motion of an object?

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• What is impedance power?

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• What does v=dx/dt means?

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• Why do falling objects make a whistle sound?

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• Can a scalar product of two vectors be zero even when neither of them is a zero vector?

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• What is an example Kepler's Second Law practice problem?

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• The top speed of a coyote is 43 miles per hour. What is the approximate speed in kilometers per minute?

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• What is inertia?

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• A copper wire of cross-sectional area 2.0 ##mm^2## carries a current of 10 A. How many electrons pass through a given cross-section of the wire in one second ?

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• What is force?

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• What does the law of conservation of momentum mean?

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• Why does a sharp knife cut better than a blunt one?

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• Why does electric potential increase with distance?

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• Why is magnetic force a non contact force?

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• What are longitudinal waves?

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• How do you find moment of inertia of two point masses?

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• How can we calculate the work done in an elastic collision?

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• How do planets orbiting the sun and skaters conserve angular momentum?

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