Category: Physics

Is a phobia a conditioned emotional response? The process of classical conditioning can explain how we acquire phobias. After an association has formed, the dog (now a conditioned stimulus) causes a response of fear (conditioned response) and consequently, we develop a phobia. Can a conditioned response be unlearned? Meanwhile, a conditioned response is learned and […]

What is the magnetic field like inside a solenoid? Solenoids. A solenoid is a long coil of wire. When a direct electric current is passed through it, the shape of the magnetic field is very similar to the field of a bar magnet. The field inside a solenoid is strong and uniform. How many turns […]

What is unit vector and position vector? UNIT VECTOR- a vector which has a magnitude of one. NULL VECTOR- Null vector is a vector with a zero magnitude. POSITION VECTOR- Position vector, straight line having one end fixed to a body and the other end attached to a moving point and used to describe the […]

Why does a bicycle tire expand when filled with gas? You can observe a real-life application of Boyle’s Law when you fill your bike tires with air. When you pump air into a tire, the gas molecules inside the tire get compressed and packed closer together. This increases the pressure of the gas, and it […]

How is apparent brightness calculated? Apparent brightness is thus measured in watts per square meter. For instance, the apparent brightness of the Sun is b = 1370 watts/meter2. That is, if you had a perfectly efficient solar panel one meter on a side, if you held it perpendicular to the Sun’s rays, it would generate […]

What is spherical wave example? One common example of a spherical wave is a sound wave. When an object oscillates or vibrates in the presence of medium, a sound wave is produced and this wave propagates outward in all possible directions. As the wave travels outward, it carries energy. How do you make spherical waves? […]

How much does it cost to run a 60w bulb for 24 hours? Let’s say you have a 60-watt incandescent lightbulb and you are paying 12 cents per kWh of energy. Leaving the bulb on the whole day will therefore cost you: 0.06 (60 watts / 1000) kilowatts x 24 hours x 12 cents = […]

Can we make oxygen out of co2? The team found that if you shoot carbon dioxide at an inert surface like gold foil, the molecule can be split to form molecular oxygen and atomic carbon. That in turn could create molecular oxygen, and served as the inspiration for the Caltech reactor. How much oxygen is […]

How much weight will I lose if I eat 800 calories a day? According to founder Dr Michael Mosley, those who closely follow the Fast 800 plan could see themselves lose up to 11lb in two weeks by limiting their daily intake to 800 calories a day. It’s been praised, alongside the 16:8 diet, as […]

What does a negative angular acceleration indicate to you? Negative angular velocity(ω) means that the particle is revolving anticlockwise. Thus, negative angular acceleration(α) is a “push” in the anticlockwise direction. If α and ω have the same sign, the body will speed up, else slow down (and eventually go in reverse). Is clockwise positive or […]