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Jim is rearranging his apartment and needs to move his entertainment center. If the gravity exerts 15 N and there is 10 N of friction, how much force will Jim need to exert to move it?
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A student pushes a book with a force of 5N to the east. which statement decribes the reaction force?
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The period of a sound wave coming from an instrument is 0.002 seconds. What is the frequency of the sound?
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David starts at a position of x=0 meters at the left side of the front of the classroom. Over the course of the class he walks back and forth in front of the class 15 times, 6 meters to the right, and
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It takes Delta U=402.3 J to raise the temperature of an amount of water by a certain temperature. How fast must a 0.42 kg ball trabel in order for it kinetic energy to equal this internal energy?
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A 10 gram sample of butter will melt at a temperature that is the melting point of 5 gram sample of butter
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If the worst fit line gradient is 9 and the best fit line gradient is 8, find the accepted gradient and uncertainty
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Which action do researchers take to make advances in science? They guard their findings against the scrutiny of outside sources. They share their experimental results with other researchers. They redu
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What is the cell cycle? A. repeating series of stages a dividing cell got through. B. the time a cell spends actively dividing. C. process of duplication of genetic material. D. repeating process of D
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A linear circuit is shown below. Figure 4-1 The elements in this circuit have the following values: R1=200Ω, R2=200Ω, R3=200Ω, V1=3V, I1=2A and I2=2A Determine the potentials at nodes A and B, assu
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Which of Shakina's statements regarding acceleration and velocity is false? "When the acceleration and velocity are in opposite directions, the particle slows down." "When the acceleration and velocit
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The block in the illustration is floating in water. Water has a density of 1.0 g/cm 3 and about 30 percent of the block is below water. What is a good estimate of the density of the block? A) 0.90g/cm
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In a thundercloud there may be an electric charge of 50 C near the top of the cloud and −50 C near the bottom of the cloud. If these charges are separated by about 3 km, what is the magnitude of the
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What animal dies in a desert area with the help of scavengers and bacteria it decomposes completely in the hot sun is second animal dies while drinking in a stream the body is covered in sediment befo
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Find the vertical displacement D(t) between the raised hands of the two players for the time period after Boris has jumped (t>tR) but before Arabella has landed.Find the vertical displacement D(t) bet
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What is an example of a hypothesis leading to a new experiment? Upon seeing bacteria under the microscope, scientists theorized that they could be the cause of illness. Galileo dropped different balls
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Select all that apply. Choose the statement(s) that best describe Earth's hydrologic, rock, and tectonic cycles. They continuously recycle Earth's materials. They contribute to a balance or equilibriu
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What is the magnitude of the gravitational force acting on a 4.0kg object which is 1.0m from 1.0kg object
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What is the magnitude of the gravitational know for checking a 4.0 kg object which is 1.0m from a 1.0 kg object
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Resultant of two equal forces may have the magnitude equal to 1 of the forces .At what angle the equal forces this is possible?Justify
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A car is traveling at 16m/s when the brakes are applied. The brakes decelerate the car at the rate of 5.0m/s^2. How long will it take to stop the car?
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A runner moves 2.38 a second North accelerates at .310 m/sssquared at a -62 degree angle how many seconds later is she running directly east
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In the 1887 experiment by Michelson and Morley, the length of each arm was 11m. The experimental limit for the ring shift was 0.005 fringes. If sodium light was used with the interferometer (λ = 589
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You drive a bumper car into another bumper car whose driver has a much larger body mass that you do. Who experiences more of a jolt, you or the other driver? Explain your answer.
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Is it possible for several scientists who have never met each other to contribute to the same scientific knowledge, theory, or law? Explain your answer.
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While researching life during colonial times, Carson learns that people would extract potassium hydroxide from wood ashes and mix it with animal fat. What were the colonists doing? generating hydrogen
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A pure solid such as naphthalene is heated until it all melts and the temperature of the liquid is then 90 degreesC. When the liquid cools, its temperature falls to about 800 C and then it remains con
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If you have a string of lights and one light goes out but others stay lit, which type of circuit do you have A) broken B) short C) series D) parallel
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What is electricity A) the movement of molecules B) the movement of atoms C) the movement of circuits D) the movement of electrons
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The city council is going to decide on whether or not to spray a certain insecticide for mosquito control. Many other towns already use this insecticide but your town wants to research the topic befor
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What kind of information doea the nutrition facts label give about requirements for essential nutrients
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A seat on a Ferris wheel moves at a constant tangential speed around the wheel. If the seat is 7 m from the center of the wheel and has a tangential speed of 0.5 m/s, what centripetal acceleration doe
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Every year the Earth travels about 109km as it orbits the Sun. What is Earth's average speed in km/h?
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For saving lives, what is the most important safely feature on a car a. air bag b. safely belt c. anti-lock brakes
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This diagram shows a skier moving down a hill. Which statement best describes the skier? The skier has potential and kinetic energy.The skier has only potential energy. The skier has only kinetic ene
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Natural gas is very abundant in the United States. Compared to other fossil fuels, which describes the waste products of the combustion of natural gas? A) Natural gas has no waste products. B) Natural
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A train travels 94 kilometers in 5 hours, and then 84 kilometers in 3 hours. What is its average speed?
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Two children are pulling and pushing a 30.0 kg sled. The child pulling the sled is exerting a force of 12.0 N at a 45o angle. The child pushing the sled is exerting a horizontal a force of 8.00 N. The
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Explain the effect of using controlled rectifiers in AC circuitsUsing waveform diagrams, explain the output characteristic of a controlled rectifier
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The electric fan shown has the following specifications: The entire unit weighs W = 15 lb with the center of gravity shown. The fan produces a maximum thrust of T = 6 lb. The height h can be adjusted
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A 480 kilogram airboat at rest applies a force of 800 Newtons for 12 seconds what is the final velocity of the Airboat
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Based on the definition of specific heat and the information provide below, if the same amount of heat is added to 1 kg of all these substances, which substance will raise in temperature to the highes
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Lead has a density of 11.3 g/cm^3. If you have 1.0 kg of lead, what is the volume in cubic centimeters (cm^3?)
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A circular test track for cars has a circumference of 3.5 km . A car travels around the track from the southernmost point to the northernmost point. what distance does the car travel?
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Maslow's hierarchy of needs assumes individuals are generally misinformed and need guidance from therapists individuals are generally good and committed to improving themselves individuals are general
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A teacher pushed a 10kg desk across a floor for a distance of 5m. she exerted a horizontal force of 20n. how much work was done?
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. When a police officer uses radar for speed control, the officer is using what kind of electromagnetic waves? X-rays gamma rays radio waves ultraviolet rays
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If the same force is applied to each of the balls shown below,which one will move the slowest? A. m=7.3kg B. m=1.0 C. m=0.75kg D. M=0.5kg
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A ball is dropped from a place above the girl in the figure. She is watching the path of the ball.Why does the ball continue moving in the same direction A. A balanced force is acting on the ball B. G
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Our Sun is one of many stars in the Milky Way Galaxy. Which term BEST describes our Sun? A) red giant B) protostar C) white dwarf D) medium sized star
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