Master Physics with Fun Quizzes & Brain Teasers!

Space questionsPlease help
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2200 kg semi truck driving down the highway has lost control. The truck rolls across the median and into oncoming traffic. The truck collides with a 2000 kg car that is traveling north at 45 m/s. The two vehicles stick together creating a single wreck that travels south at 15 m/s. what was the initial speed and direction of the semi truck?
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discuss how devastating a 7.7 - magnitude earthquake is.
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it serves as the fuctional unit of the nervous system
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a spring stretches from an initial height of 5 cm to a final stretch of 10 cm. the spring constant is 800 n/m.How much work was done on the spring?what is the final force on the spring when it is at its 10 cm stretch?explain why it is not appropriate to use the equation w=f//d when considering springs.
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Our Suns mass is 1.0 and our Earths mass is 2.0. The distance is standard as given on the simulation. Describe the path of the Earth.
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Why do we charge a capacitor under a DC voltage source only?
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In the diagram shown above, the circles represent small balls that haveelectric charges. Ball 1 has a negative charge, and ball 2 is repelled by ball 1Next, you see that ball 2 repels ball 3 and that ball 3 attracts ball 4. What isthe electric charge on ball 4?Ball 4 may have either a positive or negative charge,Ball 4 has a negative charge.Ball 4 has a positive charge.
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this is a voice recording of the text of a book that you listen rather than read.
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I really need your help, please help me. How do I solve for ke without even having mass
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These three bulbs are powered by the battery. What will happen if the middle light burns out? A. The two other bulbs will go out. B. The two other bulbs will stay on. C. Just the bulb closest to the battery will stay on. D. Just the bulb farthest from the battery will stay on.
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What is common between transverse waves and longitudinal waves?Both include an amplitude, crest, and rarefactionsBoth move faster at higher temperaturesBoth move slower through densely packed moleculesBoth include a wavelength from compression to compression
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What is the formula for Charles Law?
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i believe Newton's 1st law is
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The answer to a multiplication problem is called the?
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This problem, a squid at rest suddenly sees a predator coming toward it and needs to escape. Assume the following:______. (i) Including the water in its internal cavity, the squid has a total mass of 6.50 kg. (ii) The mass of the water in its cavity is 1.75 kg. (iii) In order to escape its predators, the squid needs to achieve an escape speed of 2.5 m/s.
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To understand and apply the formula =I to rigid objects rotating about a fixed axis. To find the acceleration a of a particle of mass m, we use Newton's second law: F net=ma , where F net is the net force acting on the particle.To find the angular acceleration of a rigid object rotating about a fixed axis, we can use a similar formula: net=I, where net= is the net torque acting on the object and I is its moment of inertia.Part A:Assume that the mass of the swing bar, is negligible. Find the magnitude of the angular acceleration of the seesaw.Express your answer in terms of some or all of the quantities m1, m2, l, as well as the acceleration due to gravity g.Part B:Now consider a similar situation, except that now the swing bar itself has mass mbar.Find the magnitude of the angular acceleration of the seesaw.Express your answer in terms of some or all of the quantities m1, m2, mbar, l, as well as the acceleration due to gravity g.
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Two 13.0-cm-diameter electrodes 0.59 cm apart form a parallel-plate capacitor. The electrodes are attached by metal wires to the terminals of a 14 V battery. What is the charge on each electrode after insulating handles are used to pull the electrodes away from each other until they are 1.7 cm apart? The electrodes remain connected to the battery during this process. What is the electric field strength inside the capacitor after insulating handles are used to pull the electrodes away from each other until they are 1.7 cm apart? The electrodes remain connected to the battery during this process. What is the potential difference between the electrodes after insulating handles are used to pull the electrodes away from each other until they are 1.7 cm apart? The electrodes remain connected to the battery during this process.
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What is the gravitational force between two students, John and Mike, if John has a mass of 81.0 kg, Mike has a mass of 93.0 kg, and their centers are separated by a distance of .620 m?
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When you use an array to implement the ADT list, retrieving an entry at a given position is slow.a) trueb) false When you use an array to implement the ADT list, adding an entry at a the end of the list is fast.a) trueb) false When you use a vector to implement the ADT list, retrieving an entry at a given position is slow.a) trueb) false When you use a vector to implement the ADT list, adding an entry at a the end of the list is fast.a) trueb) false
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You perform nine (identical) measurements of the acceleration of gravity (units of m/s2): 10.1,9.87, 9.76, 9.91, 9.75, 9.88, 9.69, 9.83, and 9.90. The true value is 9.81. Calculate the standard error of your results to ONE significant digit.
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You have now seen examples during lecture on how to calculate the electric field for a line of charge and a ring of charge - both uniformly distributed. This activity will ask you to solve for the electric field, on-axis, of a uniformly-charged disk sitting in the yz plane. Below is a picture of the situation of interest. Note: Treat it as a totally flat disk and ignore its thickness in the x direction. Also, let x be the distance between the center of the disc and point P.
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Please answer the following question (in image).
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A plane's average speed between two cities is 750 km/hr. If the trip takes2.5 hrs. how far does the plane fly?
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