Physics quiz. Since we have three resistors, let's apply a different equation to each as an exercise. What is the maximum height reached by the stone? We now have two overarching theories to explain just about every physical phenomenon: Einstein’s theory of gravity (general relativity) and quantum mechanics. An antiproton is just like a proton, for example, but with a negative charge. Collisions and Newton’s Laws of Motion – How to relate these? (The current divides and divides again in an effort to follow the path of least resistance.) Draw the other three forces acting on the brick. These pairs form two parallel circuits, one on the left and one on the right. Physicists have created antimatter in the laboratory. How to deviate light rays by 90 degrees with a prism? The idea is highly speculative. “The Standard Model doesn’t explain everything,” says Dr. Don Lincoln, a particle physicist at Fermi National Accelerator Laboratory (Fermilab) near Chicago. A downward force F1 = 50 N is also applied to the brick. Now that we have the effective resistance of the entire circuit, let's determine the current from the power supply using Ohm's law. I am going to have to paraphrase as it was 30 odd years ago. Each appliance will also get the same regulated voltage, which simplifies the design of electrical devices. (Answer: 250 m/s 2) Problem # 3 The particle in problem # 2 begins to slow down with an angular acceleration of -1 rad/s 2. “It’s very counterintuitive,” she says. Electrostatic Problems with Solutions and Explanations. ... Return to Real World Physics Problems home page. So a better understanding of this “gray zone” might have important practical applications. A 15 A circuit operating at 120 V consumes 1,800 W of total power. A brick with a mass of 15 kg is pushed to the right by a force F2 = 100 N so that it slides along a horizontal tabletop. These numerical problems and questions are distributed among 7 sets of Questions for you. How to use the viewer?-Just scroll or flip with the tools given -There is a full screen option (at top mid)and then solve the challenges. This means that the impact is the same as hitting a solid wall at 100 km/h. No part of this problem is difficult by itself, but since the circuit is so complex we'll be quite busy for a little while. Let's begin the process by combining resistors. Why is there more matter than antimatter? One possibility — speculative at this point — is that in addition to the three dimensions of space that we notice every day, there are hidden extra dimensions, perhaps “curled up” in a way that makes them impossible to detect. Then life took hold, and it has thrived ever since. In Whiteson’s view, entropy isn't the whole story. What would a quantum theory of curved space-time look like? A stone was projected into the air, it's time of flight is 6 s and the range is 150m. This hub looks at questions asked of me in a year of teaching physics - the questions have come from young and old alike, so there should be something of interest for you here. A brick with a mass of 15 kg is pushed to the right by a force F2 = 100 N so that it slides along a horizontal tabletop. A kitchen in North America has three appliances connected to a 120 V circuit with a 15 A circuit breaker: an 850 W coffee maker, a 1200 W microwave oven, and a 900 W toaster. Once life took root on our planet, some four billion years ago, it spread everywhere. “What are the crucial parameters to avoid clogging?” Weirdly, an obstruction in the flow of traffic can, under certain conditions, actually reduce traffic jams. In this case we'll start by finding the effective resistance of the entire circuit and the current from the battery.