Master Physics with Fun Quizzes & Brain Teasers!

Which best describes a difference between laser light and regular light?Laser light is less concentrated.Laser light has a beam that spreads out.O Laser light is made of one specific color.O Laser light pumps out light particles one at a time.
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List 2 examples of physical properties that don'tchange if the sample size changes.
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2.9030 cm has 4 significant digits.TRUE OR FALSE
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MULTIPLE CHOICE QUESTIONWhat is the acceleration of the object?(Remember a = Fnet/m and acceleration needs adirection)8 m/s/s0.125 m/s/s to the right8 m/s/s to the left8 m/s/s to the right
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Which atmospheric layer gets warmer as altitude increases and contains the ozone layer?
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2.9030 has 4 significant digits.TRUE OR FALSE
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This waterbottle has a mass of .5 kg. If the net force acting on the bottle is five and to the right what is the bottles acceleration (hint: use formula a=f/m
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A boat is headed with a velocity of 18 meters/second toward the west with respect to the water in a river. If the river is flowing with a velocity of 2.5 meters/second in the same direction as the boat. What would be the magnitude of the boats velocity? A. 16.5 meters/second B. 20.5 meters/second C. 18 meters/second D. 2 meters/second E. 45 meters/second
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Joe follows the procedure below to make a compass. 1. Move a magnet from the top of a needle to its point fifty times. 2. Lay the needle on a cork that is floating in a bowl of water. 3. Observe the direction that the needle points. What is the purpose of step 1? to give the needle an electric charge to make the needle sharper to magnetize the needle to flatten the side of the needle
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Which describes elements in the first group of the periodic table?
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Which particle is used as a beam to treat cancer? electron neutron proton
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Light and sound waves both share what characteristic?A: they both exhibit the doppler effectB: light and sound are both transverse wavesC: they both move fastest in waterD: light and sound both require medium in which to travel
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how does 'g' at a point vary with the distance from the centre of earth?
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What statements accurately describe sunspots? Check all that apply.Sunspots are storms on the Sun's surface.Sunspots are marked by intense magnetic activity.Sunspots produce solar flares and hot gassy ejections.Sunspots can affect Earth's climate.Sunspots are cool areas where the Sun is covered by clouds.
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Which statement describes all solids?
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Two persons A and B are walking with the speed of 5km/h and 6km/h respectively in the same direction. Find how far will B be from A after 2 hours??
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The reverse of the process of sublimation is calleda freezing.b vaporization.c deposition.d condensation.Science
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a horse was at rest.what was the final velocity of the horse if it covered 200 meters in 16 seconds?
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1. If all other things remain equal, which of the following changes to a closed circuit would result in increased resistance to the flow of electric current?Correct Answer: A) Reducing the thickness of the conductorB) Replacing the conductor with a more conductive materialIncorrect Response: C) Reducing the length of the conductorD) Reducing the temperature of the conductor 2. What term refers to producing magnetism by placing a body within a magnetic field?A) PolarizationB) Natural magnetismC) Incorrect Response: Artificial magnetismD) Correct Answer: Induced magnetism3. What two things must exist for an electric current to be produced?A) A negatively charged electrode and a positively charged electrodeB) Incorrect Response: A pair of highly conductive materials and a conducting path between themC) Correct Answer: An electric potential between two bodies and a conducting path joining the bodiesD) A source of voltage and an open circuit4. If all other things remain equal, which of the following changes to a closed circuit would result in increased resistance to the flow of electric current?A) Correct Answer: Reducing the thickness of the conductorB) Replacing the conductor with a more conductive materialC) Incorrect Response: Reducing the length of the conductorD) Reducing the temperature of the conductor5. Three components in a parallel circuit have individual resistances of r1, r2, and r3. What formula can you use to determine the total resistance of the circuit?A) 1/R= r1 + r2 + r3B) Incorrect Response: R= 1/r1 + 1/r2 + 1/r3C) Correct Answer: 1/R= 1/r1 + 1/r2 + 1/r3D) R= r1 + r2 + r36. Which of the following materials commonly used in electronic devices is classified as a semiconductor?A) Correct Answer: SiliconB) Incorrect Response: CopperC) GlassD) Plastic7. Which of the following explains why your hair stands on end when you rub it with a balloon?A) The balloon creates friction, which sticks your hair to it.B) Correct Answer: Electrons from your hair jump to the balloon, causing it to become negatively charged on one side.C) Incorrect Response: Protons from your hair jump to the balloon, causing it to become negatively charged on one side.D) Protons from the balloon jump to your hair, causing it to become negatively charged.
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Pregunta 2George took his puppy to a dog park and unleashed her once they entered the gate. The puppy accelerated Northward, from rest, to 15 meters per second in 10seconds. What was China's displacement in this time interval?
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from readong these two paragraph only the best description of Austin is that he is a ___ character
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You are in a car moving at 50 mph to the right, from the reference frame of the ground. A truck is next to you moving at 30 mph to the right, also from the reference frame of the ground. Which is true from your reference frame of the car?a. The truck would appear to stand still.This answer is incorrect.b. The truck would appear to be moving forward.c. The truck would appear to be moving backward.
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To describe a position in more than onedimension, you must use more than one______
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An airplane flying at 119 m/s is accelerated uniformly at the rate of 0.5 m/s2 for 10seconds. What is its final speed?
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