Master Physics with Fun Quizzes & Brain Teasers!

A tow rope, parallel to the water, pulls a water skier directly behind the boat with constant velocity for a distance of 72 m before the skier falls. The tension on the rope is 140 N. a) Is the work done on the boat by the rope positive, negative, or zero? Explain. b) Calculate the work done by the rope on the boat.
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(1 point) find the total mass of the triangular region shown below. all lengths are in centimeters, and the density of the region is (x)=4 x grams/cm2.
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a 8.01x10-14 j (kinetic energy) proton enters a 0.20-t field, in a plane perpendicular to the field. what is the radius of its path?
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Marina walked 2km in half an hour, what was her average speed during her walk?
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If an atom of oxygen has an atomic number of eight that means...E. there are 8 protonsF. there are 8 neutronsG. it weighs 8 amuH. it is in group 8
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Which of these foods has the most protein?BroccoliStrawberriesChickenBrown Rice
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What does ionic bond mean
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A diode for which the forward voltage drop is 0.7 V at 1.0 mA is operated at 0.5 V. What is the value of the current
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ANSWER QUICK 30 POINTSWhat force controls the movement of the planets around the sun, holds together stars grouped in galaxies, and galaxies grouped in clusters? Thoroughly explain your answer, making sure to include an example and describe how this force keeps planets in orbit. Make sure to write at least 3-5 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words (pls dont just take my points :( )
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ANSWER QUICK 30 POINTSWhat force controls the movement of the planets around the sun, holds together stars grouped in galaxies, and galaxies grouped in clusters? Thoroughly explain your answer, making sure to include an example and describe how this force keeps planets in orbit. Make sure to write at least 3-5 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words (pls dont just take my points :( )
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Consider a simple pendulum consisting of a massive bob suspended from a fixed point by a string. Let T denote the time (the period of the pendulum) that it takes the bob to complete one cycle of oscillation (the time it takes for the pendulum to swing back and forth one time). How does the period of the swing of the simple pendulum depend on the quantities that define the pendulum and the quantities that determine the motion
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Which of these objects are constantly in motion? Select all that apply.A.EarthB.PlanesC.TrainsD.BloodE.SunF.Cars
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ANSWER QUICK 30 POINTSWhat force controls the movement of the planets around the sun, holds together stars grouped in galaxies, and galaxies grouped in clusters? Thoroughly explain your answer, making sure to include an example and describe how this force keeps planets in orbit. Make sure to write at least 3-5 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words
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Rosa wants to determine how long it will take her to drive from her house to her grandmothers house 20km away. Her average speed is 10km/hr. What formula do you use? A. S=D/T B. D=SxT C. T=D/S D. T=S/D
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If the population runs out of food after 6 hours, what would most likely happen to the graph line between 8 and 10 hours?It would level off.It would decline.It would continue to increase.
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what is the result of seafloor spreading?
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_____________________health is how you feel and how you react to situations bases on how you feel.Group of answer choicesMentalPhysicalEmotionalSocial
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Of the charge Q initially on a tiny sphere, a portion q is to be transferred to a second, nearby sphere. Both spheres can be treated as particles. For what value of q/Q>0.5 will the electrostatic force between the two parts have 1/3 of the maximum possible value?
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A honeybee leaves the hive, flies in a straight line to a flower 6 km away in 15 min, and then takes 15 minutes to return (also in a straight line). a.) Please find the distance travelled and displacement for the entire trip: distance travelled: 1 12 km displacement: 2 0 km b.) Please find the average speed and average velocity for the entire trip: average speed: 3 0.4 km/min average velocity: 4 0.4 km/min c.) If the bee had not flown in a straight line-- but instead with an unknown motion-- to the flower and back, which could not be determined: the average speed or average velocity
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A device for acclimating military pilots to the high accelerations they must experience consists of a horizontal beam that rotates horizontally about one end while the pilot is seated at the other end. In order to achieve a radial acceleration of 32.7 m/s2 with a beam of length 5.29 m , what rotation frequency is required
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The earth rotates through one complete revolution every 1,440 minutes. Since the axis of rotation is perpendicular to the equator, you can think of a person standing on the equator as standing on the edge of a disc that is rotating through one complete revolution every 1440 minutes. Find the angular velocity of a person standing on the equator.
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I NEED HELPP!!! Calculating the Value of an Unknown Resistor
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PLEASE HELPPLook at the picture
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Which of the following is NOT a criteria for a celestial object to be a planet?-The object has cleared the neighborhood around its orbit of smaller objects.-The object is in orbit around the Sun.-The object has a nearly spherical shape.-The object must be massive enough have a gravitational pull on the sun.
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