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A sound wave traveling at STP has a period of .0023 seconds. The wavelength of this sound is closest to 1)1.4E52)6.9E-63)0.76m4)76m
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A drive is driving a car at 36 km per hour. When he applies brake they cause a deceleration of 3 ms-2. If he takes 1s to apply the brakes ______is the distance travelled by the car during this period A)16.67mB)16mC)21.75mD)15
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Which force causes tectonic plates to change at plate boundaries
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D= 50 m S= 40 m/s T= ?
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Which statement about electromagnetic waves is true?A. Electromagnetic waves require a medium to travel.B. Electromagnetic waves don't require a medium to travel.C. The particles of the medium through which electromagnetic waves travel vibrate perpendicularly to the direction of the wave.D. The particles of the medium through which electromagnetic waves travel vibrate parallel to the direction of the wave.
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Select the correct answer.Which is a transverse wave that requires a medium to move?A. ocean waveB. sound waveC. light waveD. microwave
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What acceleration is produced by a force of2000 N acting on a person of mass 80 kg?
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What is the net force required to give an automobile with a mass of 1,600 kg an acceleration of 4.5 m/s2
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Which best explains why making a pancake from batter is an example of a chemical change? -The pancake that forms is a different state of matter. -The change from batter to pancake can be reversed.-A new substance forms when the batter is cooked. -The batter changes shape when it is cooked.
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Gold in its pure form is too soft to be used for most jewelry. Therefore, the gold is mixed with other metals to produce an alloy. The composition of gold alloys are always calculated by mass, using the karat (kt) as a unit of measure. A karat represents a proportion by mass of one part in twenty-four. The higher the karat value, the higher the proportion of gold in relation to the total metal content. Pure gold is therefore 24 karat, while an 18-karat gold alloy contains (at least) 18 parts (by mass) of gold out of 24 parts total.In a sample of 18-karat gold, 75 percent of the total mass is pure gold, while the rest is typically 16 percent silver and 9 percent copper. If the density of pure gold is rhogold = 19.3 g/cm^3, while the densitites of silver and copper are respectively rhosilver = 10.5 g/cm^3 and rhocopper = 8.90 g/cm^3. a) What is the overall density rho18kt of this alloy of 18-karat gold?Express your answer in grams per cubic centimeter to three significant figures.
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The periodic table is often referred to as the chemists'______.
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How far would a baseball travel in 0.5 s if it is thrown at a speed of 20 m/s?40 s10 mO 10s40m
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How much time will it take for a bug to travel 5 meters across the floor if it istraveling at 1 m/s?5 m5 m/s6 m/s55
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Which term best describes the phrase "something that happens"?A. ExperimentB. ObservationC. HypothesisD. Phenomenon
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when two strands of dna line up adenine pairs up with
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1. How far can your little brother get if he can travel at 2.5 m/s and in 5 secondsyou will discover that his squirt gun has run out of paint?12.5 m/s12.5 m0252 m
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A ____ is another name for a group of elements with similar propertieson the periodic table of elements.
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What must you do if you plan to exercise everyday
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A 3.1 kg ball is thrown straight upward with a speed of 18.2 m/s. Use conservation of energy to calculate the maximum height the ball can reach.
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You are assigned the design of a cylindrical, pressurized water tank for a future colony on Mars, where the acceleration due to gravity is 3.71 m/s^2. The pressure at the surface of the water will be 150 kPa , and the depth of the water will be 13.6 m . The pressure of the air outside the tank, which is elevated above the ground, will be 93.0 kPa .A) Find the net downward force on the tank's flat bottom, of area 2.15 m^2 , exerted by the water and air inside the tank and the air outside the tank.
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What is the velocity of light as it moves from air to diamond.
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What is the index for a type of oil if light has a velocity of 2.5 x 10^(8) m/s in thissubstance?
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3How does and charged object become positive?loses electrons60O gains electrons39loses protonsO gains protons
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