Category: Physics

Does a bullet touch the barrel? Bullets touch the inside of the gun’s barrel during normal operation. There’s rifling inside the barrel that’s supposed to impart spin on the bullet. So the barrel rubs grooves in the bullet (this is how CSI can match a bullet to a gun) but the softer bullet does little […]

At what distance does gravity end? Near the surface of the Earth (sea level), gravity decreases with height such that linear extrapolation would give zero gravity at a height of one half of the Earth’s radius – (9.8 m·s−2 per 3,200 km.) What is SI unit of weight? The SI unit of mass is the […]

What is the correct format for recording data? The correct format to record this data is (9.23 ± 0.21) s or (9.23 ± 0.21) s, where 0.21 s is the uncertainty measured by starting and stopping the stopwatch as quickly as possible. How do you write significant digits? Rules for Numbers WITHOUT a Decimal Point […]

Are broken Christmas lights a fire hazard? Tip 1: Replace Old Or Damaged Christmas Lights Check for cracked or frayed cords, wires poking through the insulation and sockets without bulbs. It might seem tedious, but damage to the cord or light bulb could cause an electric shock when plugged in or, worse, an electric fire. […]

Why are the first 3 years of life so important? Recent research confirms that the first five years are particularly important for the development of the child’s brain, and the first three years are the most critical in shaping the child’s brain architecture. They have a direct impact on how children develop learning skills as […]

What are the equations of motion in circular path? An object executing uniform circular motion can be described with equations of motion. The position vector of the object is →r(t)=Acosωt^i+Asinωt^j, r → ( t ) = A cos ω t i ^ + A sin ω t j ^ , where A is the magnitude […]

How can you improve your physical fitness? They keep your heart, lungs, and circulatory system healthy and improve your overall fitness. Examples include brisk walking, jogging, swimming, and biking. Strength, or resistance training, exercises make your muscles stronger. Some examples are lifting weights and using a resistance band. Which exercise will help to cure diabetes? […]

What is the truck speed limit in California? 55 miles per hour How fast can trucks stop? At 55 MPH on dry pavement with good brakes, it can take a heavy vehicle about 390 feet to stop. It takes about 4 seconds. total stopping distance: At 55 MPH it will take about 6 seconds to […]

Is MRSA hard to get rid of? MRSA is resistant to many antibiotics so it can be difficult to treat. However, there are antibiotics that can treat MRSA and make the infection go away. Your doctor may culture your infection and have the lab test the bacteria to find out which antibiotic is best for […]

Is it safe to drink deuterium? The breakthrough involves the use of heavy water as a chemical tracer. Made by swapping water’s hydrogen atoms with their heavier relative, deuterium, heavy water looks and tastes like regular water and in small doses (no more than five tablespoons for humans) is safe to drink. How much of […]