Physics Homework Answers & Questions Page 44

• How can an object have a negative acceleration while speeding up and a positive acceleration while slowing down? Please explain using easy terms, I do not understand the way my textbook explains it.

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• What are some examples of an elastic collision?

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• Does charging by induction or conduction occur during a thunderstorm?

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• How many miles per hour is 25.4 feet per second?

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• What is electron affinity?

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• A steel wire in a piano has a length of 0.7 m and a mass of 0.0043 kg. To what tension must this wire be stretched so that the fundamental vibration with frequency of 261.6 Hz?

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• What medium does sound travel through best?

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• A train comes to a stop in 3 minutes. if the train had a uniform acceleration of -3.5 m/s/s what was initial velocity of the the train?

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• What is a wedge?

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• Is capacitance inversely proportional to distance?

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• Why is acceleration inversely proportional to mass?

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• What is the Bernoulli's principle?

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• Why does the coefficient of friction has no units?

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• What is a period in physical science?

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• How does the first law of thermodynamics apply to photosynthesis?

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• What is an example of potential energy in nature?

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• What are some examples of relative motion?

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• Explain vector and rectangular components of a vector?

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• What is the main difference between an inelastic and a perfectly inelastic collision?

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• How do you calculate the mechanical advantage of a compound pulley?

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• A cheetah can run at a speed of 75 miles per hour and can sustain that speed for about 1,500 feet. Approximately how fast is the cheetah running in feet per second?

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• What is buoyancy?

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• What is rotational motion?

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• How is impulse related to momentum?

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• Among red and violet color which has higher speed?

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• A clock with an iron pendulum keeps correct time at 20C.How much will it lose or gain per day if temperature changes to 40C?Coefficient of cubical expansion of iron =36x10-6C-1

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• What is radioactivity?

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• What is torque?

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• Why is horizontal velocity constant in projectile motion?

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• A right circular cylinder with a radius of 2.3cm and a height of 1.4cm has a total surface area of? a) ##5.3*10^-3## b) ##7.4*10^-3##

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• Why gravitational acceleration is zero at the centre of the Earth maximum at the poles and minimum at the equator?

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• What is free fall and how does it relate to gravity?

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• Derive the formula for centripetal acceleration?

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• Why can you safely handle a 1.5-V battery without being electrocuted?

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• How is buoyant force related to weight?

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• What properties of light are used in a periscope?

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• What does advent mean?

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• How do you convert gallons to liters?

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• How does gravity causes erosion?

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• What does a transformer do to AC voltage?

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• How does energy flow through an ecosystem?

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• If a 60 kg person on a 15 kg sled is pushed with a force of 300 N, what will be a person's acceleration?

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• How can I calculate the densities of a hydrogen nucleus and a hydrogen atom?

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• How is buoyant force related to floating and sinking?

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• How does heat differ from thermal energy?

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• How are electromagnetic waves different from sound waves?

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• What is the magnitude and direction of the gravitational force that acts on a woman who weighs 500 N at the surface of Earth?

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• How do you calculate specific heat capacity of an unknown metal?

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• What kind of simple machine is a pliers?

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• How would you add two vectors that aren't perpendicular or parallel?

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