What is the output of a flashlight? The light output of an incandescent lamp in a flashlight varies widely depending on the type of lamp. A miniature keychain lamp produces one or two lumens. A two D-cell flashlight using a common prefocus-style miniature lamp will produce on the order of 15 to 20 lumens of […]
What are the three means of exchange?
What are the three means of exchange? It consists of : 1) currency (coins, paper money), 2) checkable deposits, ( total of checking account balances in financial institutions convertible to currency “on demand” by writing a check without advance notice), and 3) traveler’s checks. This type of money is the most liquid. Which of the […]
What are sedentary activities?
What are sedentary activities? Examples of sedentary behaviour include: Sitting or lying down while watching television or playing electronic games. Sitting while driving a vehicle, or while travelling. Sitting or lying down to read, study, write, or work at a desk or computer. How do you know if you are sedentary? Unless you do at […]
What are the 3 stages of a cool down?
What are the 3 stages of a cool down? There are three primary phases in the cool down period: 1: Immediate Phase. The immediate phase occurs right after the run, when the heart rate is still elevated and muscles are fatigued. 2: Intermediate Phase. 3: Late Phase. How do you feel after cooling down? Stopping […]
Are work and impulse the same?
Are work and impulse the same? Impulse is a vector, so a negative impulse means the net force is in the negative direction. Likewise, a positive impulse means the net force is in the positive direction….Common mistakes and misconceptions. Impulse Work Changes an object’s momentum energy Quantity type vector scalar What does kW mean in […]
What is the difference between yellow and white road lines?
What is the difference between yellow and white road lines? Broken or “dotted” white lines are used to show the center line between lanes. Yellow lines show you where traffic is going in different directions. Stay on your side of the yellow line and you’ll avoid nasty head-on collisions with folks coming the opposite way. […]
What does determine the chemical Behaviour of atom?
What does determine the chemical Behaviour of atom? The atomic number indicates the number of protons within the core of an atom. When an atom is generally electrically neutral, the atomic number will equal the number of electrons in the atom, which can be found around the core. These electrons mainly determine the chemical behaviour […]
Is the sun hotter than lightning?
Is the sun hotter than lightning? Lightning is four times hotter than the sun. The surface of the sun is around 11,000 degrees F. Scientists determined that temperature more than 20 years ago by examining the light given off by a bolt of lightning. How common is ball lightning? 1AD25), ball lightning has been seen […]
How far is the core from the crust?
How far is the core from the crust? The ball-shaped core lies beneath the cool, brittle crust and the mostly-solid mantle. The core is found about 2,900 kilometers (1,802 miles) below Earth’s surface, and has a radius of about 3,485 kilometers (2,165 miles). Do you need planning permission to dig out a basement? Excavating to […]
What is the vertical component of the velocity just before the ball hits the ground?
What is the vertical component of the velocity just before the ball hits the ground? When a projectile reaches maximum height, the vertical component of its velocity is momentarily zero (vy = 0 m/s). Is horizontal velocity constant? The horizontal velocity of a projectile is constant (a never changing in value), There is a vertical […]