Master Physics with Fun Quizzes & Brain Teasers!

How can you use ohms law in the form of y=mx+c to calculate the average resistance of an ohmic conductor
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A marble is thrown norizontally from a tarble top with a velocity of 1. 50m/s. The marble falls 0. 70m away from te table'ede. How high is the lab table? what is the marble's velocity just before it hits the floor
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In ancient times, many people believed that our lives were somehow influenced by the patterns of the stars in the sky. Modern science has not found any evidence to support this belief, but instead has found that we have a connection to the stars on a much deeper level: We are "star stuff. "Do you think these connections have any philosophical implications in terms of how we view our lives and our civilization?
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Questions 1 Describe how radio telescopes are used to explore space. 2. How are radio waves used on Earth? 3. Why do radio telescopes convert radio waves (analog signals) to electrical (digital) signals for analysis? (Hint: What did the article say about the advantages of digital signals?)
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Base your answer to the following question on theinformation below.A 2.00 106-hertz radio signal is sent a distance of7.30 1010meters from Earth to a spaceshiporbiting Mars.Approximately how much time does it take the radiosignal to travel from Earth to the spaceship?
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What is the angle of incidence for this ray?
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Determine the forces in all the members and state if these members are in tension or compression,use table to arrange your calculations (show the results on the truss)
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You do 25 J of work in pushing a crate up a ramp. If the output work from theinclined plane is 10 J, then what is the efficiency of the inclined plane?
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Tritium (hydrogen-3) undergoes radioactive decay to produce helium-3. whichparticle needs to be added to this equation to show that the total numbers ofneutrons and protons are not changed by the reaction? marking brainliest! points
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26.0 g of mercury is heated from 28c to 175c, and absorbs 545 joules of heat in the process. calculate the specific heat capacity of mercury.
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Explain why knowing a combination of grappling and striking martial arts is advantageous during a street self defense scenario. Explain how both are beneficial
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A plane flying horizontally at an altitude of 1 mi and a speed of 510 mi/h passes directly over a radar station. find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station.
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Mr. wang works in a recycling center. recyclable materials arrive at the center mixed together. workers use magnets to separate steel cans from other items. which two statements are true about the force between a steel can and a magnet? *1 pointthe attraction between the can and the magnet is a pull.gravity pushes the can toward the magnet.the force between the can and the magnet is a noncontact force.the attraction between the can and the magnet is a push.
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The radium isotope 223Ra, an alpha emitter, has a half-life of 11. 43 days. You happen to have a 1. 0 g cube of 223Ra, so you decide to use it to boil water for tea. You fill a well-insulated container with 460 mL of water at 16 and drop in the cube of radium. How long will it take the water to boil?Express your answer with the appropriate units
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Two ropes support a load of 478 kg. The two ropes are perpendicular to each other, and the tension in the first rope is 2. 2 times that of the second rope. Find the tension in the second rope. The acceleration of gravity is 9. 8 m/s 2. Answer in units of N
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Calculate the pressure exerted by a girl on the ground if her mass is 50 kg and the areaof her shoes in contact with the ground is (a) 150 cm2 (high heels); (b) 400 cm2 (flatsoles). (take gravitational field strength g= 10 n kg)
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I will mark you brainlist!what do you think would happen if this froest ecosystem experienced an extreme drought that cut the popluation of primary producers in half?
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Activity 3:Direction: Read the sample weather bulletin. Weather Bulletin: Tropical Cyclone Typhoon Rolly (GONI)Sunday, 1 November, 2020 at 4:00 PM (DOST PAG-ASA 2020)Location of Center50 km South Southwest of Tayabas, QuezonCoordinates13. 6N, 121. 40 EStrength of the WindsMaximum sustained winds of 165 km/h nearthe center and gustiness of up to 230 km/h. MovernentMoving westward at 25 km/hForecast positions(24 hours) Afternoon of November 2: 300 kmWest of Iba, Zambales15. 1 N, 117. 20 E(48 hours) Afternoon of November 3: 665 kmWest of Iba, ZambalesOutside PAR (15 N, 113. 8E)(72 hours) Afternoon of November 4: 935 kmWest of Central LuzonOutside PAR (14. 79 N, 111. 6 E)Questions:3. What is the speed of the typhoon winds?What is the velocity of the typhoon?How does speed differ from velocity?How important is knowing the velocity in determining the weatherforecast for the next hours?4Let Us Reflect
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Laboratory worksheetin this activity you will use the virtual laboratory to create an electromagnet to pick up paperclips. notice that there are many variables to test in this lab. there is a power supply, a core for the wire to wrap around, different types of wire, and different gauges or thicknesses of wire. the voltage can also be adjusted. for each trial, choose one variable to change. pre-lab questions:explain what it means when we say a substance is magnetic. discuss the relationship between electric and magnetic fields. what type of metals are known as ferromagnetic metals?open the lab interactive and run a few trials changing the variables each time. decide which variable you want to change in order to make a strong electromagnet, and record it here. this will be your independent variable. hypothesisrecord your hypothesis as an "if, then" statement. (if the independent variable does this, then the dependent variable will do that. )variableslist the independent (test variable), dependent (outcome variable), and controlled variables. be sure to change just one variable for each trial. procedureuse the virtual laboratory to create an electromagnet, changing only your independent variable. record the data and what each variable was set at for each trial. record the number of paper clips the electromagnet picked up for each trial (this is the dependent variable and reflects the strength of the electromagnet). repeat your trial three times. you should vary only the independent variable you chose. datarecord your data for each trial. be sure to change just one variable at time. this will allow you to see which variables will affect the number of paper clips collected. trial size of wire gauge material of wire voltage number of winds resulting paper clips picked uptrial 1 trial 2 trial 3 post-lab questionsreview your data. did your experiment support your hypothesis? explain your answer. what role does voltage play in the formation or use of an electromagnet?if you were able to keep the electromagnet that you created in your laboratory activity, what would be two possible uses for the electromagnet?what is an advantage of using an electromagnet rather than a regular magnet?
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A typical color television draws about 2. 5 Awhen connected to an 89 V source. What is the effective resistance of the T. V. set?Answer in units of
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A roller coaster has a cart with a mass of 150 kg and a track that spans 75 meters. what is the average velocity of the cart if it took 3 minutes to complete the track?
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A 1. 0-kg wheel in the form of a solid disk rolls along a horizontal surface with a speed of 6. 0 m/s. What is the total kinetic energy of the wheel
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Bart has rubbed a balloon with wool to give it a charge of -1.0 x 10-6 c. he then acquires a plastic golf tube with a charge of +4.0 x 10-6 c localized at a given position. determine the distance between the golf tube and the balloon if the electrical force between the two is -1.0 x 10-5 n.
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Vocabulary: electron volt, frequency, photoelectric effect, photon, photon flux, voltage, wavelength, work function Prior Knowledge Questions (Do these BEFORE using the Gizmo. ) 1. Suppose you went bowling, but instead of a bowling ball you rolled a ping pong ball down the alley. What do you think would happen? 2. Suppose you rolled a lot of ping pong balls at the bowling pins. Do you think that would change the results of your experiment? Explain. Gizmo Warm-up The photoelectric effect occurs when tiny packets of light, called photons, knock electrons away from a metal surface. Only photons with enough energy are able to dislodge electrons. In the Photoelectric Effect Gizmo, check that the Wavelength is 500 nm, the Photon flux is 5 /ms, the Voltage is 0. 0 volts, and Potassium is selected. Click Flash the light to send photons of light (green arrows) toward a metal plate encased in a vacuum tube. 1. The blue dots on the metal plate are electrons. What happens when the photons hit the electrons? 2. What happens when the electrons reach the light bulb? _________________________________________________________________________ When electrons reach the light bulb they complete a circuit, causing the bulb to glow briefly
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