Category: Physics

Is Climbing stairs good for knees? Stair climbing benefits Both of these large muscle groups get a workout when you climb stairs. Your own weight is enough to make stair climbing a challenge. Stair climbing also benefits the knees indirectly by helping to manage your weight. By walking up steps for just five minutes, you […]

Why are pendulums not SHM? Any pendulum undergoes simple harmonic motion when the amplitude of oscillation is small. The pendulum still oscillates, but the motion is no longer simple harmonic motion because the angular acceleration is not proportional to the negative of the angular displacement. What is the maximum displacement of a body in simple […]

How do you find the speed of light in cooking oil? c – speed of light in vacuum; n2 – refractive index for the oil. Thus the total value of the speed of light penetrated through the glass and the oil, can be calculated according to the formula below: v3 = c/(n1*n2) = 299792/(1.5*1.33) = […]

What will replace the space shuttle? Orion is NASA’s new spacecraft, built to take humans farther into space than they’ve ever gone before. It will carry the crew to space, provide emergency abort capability, sustain the crew and provide a safe return to Earth. Does NASA use SpaceX? NASA’s support of companies like SpaceX has […]

What is the most powerful force in the world? Armed Forces The United States in comparison, has significantly less – 1.4 million – but when assessing the overall power of the world’s military forces, the U.S. comes out on top, ahead of Russia and China in second and third, respectively. Which country has no army? […]

Where is kinetic energy the greatest on a hill? As you begin to descend, your potential energy decreases until it’s all gone at the bottom of the hill.” “At the bottom of the first hill, your kinetic energy is at its highest point. How is kinetic energy affected by his speed? It turns out that […]

How fast is the volume of a sphere increases as the radius increases? Since time just increases, and the radius increases as a function of time, and the volume increases as a function of a constant times the radius cubed, the volume increases faster than the radius increases, so we can’t just say the two […]

What is the efficiency of the cycle? THe total thermal energy transferred out of the gas in one cycle is 1300J. Determine the efficiency of the cycle. The area within the cycle is equivalent to the work done by the gas, which is 610J. My first guess was just the ratio of the useful work […]

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Is powdered chocolate a solute? The solution of hot chocolate becomes one mixture rather than powder and water. The substance that is being dissolved in another substance is called the solute. In this example, the hot chocolate powder is the solute. Is chocolate powder dissolve in hot water easily? Explanation: Hot water has more energy […]