Category: Physics

How can you determine the direction of the magnetic field of two parallel wires? If parallel wires are carrying electric current, magnitudes of the forces with which they are acting on each other are equal and the following relation can be applied: F=μo2πI1I2Rl. Direction of the current in the wire affects only the direction of […]

Does air get thinner in cold? You may have heard people say that the air is “thinner” at higher altitudes. What this means is that it is less dense. Generally, the less dense air is, the colder it is. So the air is densest closest to the surface of the Earth, then it gradually becomes […]

Why does it hurt when we fall? When we fall, our instinct is to catch ourselves and stop that fall. When we do this, we tense up other muscles and can potentially create other body pains with this tensing. This can continue for a while, until it is addressed, or the muscle settles into a […]

How many atoms of carbon are present? Each of these quantities contains 6.022×1023 atoms of that particular element. The units for molar mass are grams per mole or g/mol. 1.00mol of carbon-12 atoms has a mass of 12.0g and contains 6.022×1023 atoms. How many atoms are in a sugar cube? The white stuff we know […]

What causes a subtropical jet stream? Subtropical jet stream, a belt of strong upper-level winds lying above regions of subtropical high pressure. Unlike the polar front jet stream, it travels in lower latitudes and at slightly higher elevations, owing to the increase in height of the tropopause at lower latitudes. What are the 3 conditions […]

What happens when the air temperature and the dew point is the same? When the dew point temperature and air temperature are equal, the air is said to be saturated. Dew point temperature is NEVER GREATER than the air temperature. Therefore, if the air cools, moisture must be removed from the air and this is […]

What is the force action of hammer? The hammer strikes the nail exerting a force on the nail. Newtons third law states that if a force is exerted on an object, the object exerts a force back. So the nail exerts a force back on the hammer. What will happen if you hammer a piece […]

Which are not characteristics of laser? Which of the following is not a characteristic of LASERS? Explanation: The lasers are highly directional having almost no divergence. The output beam of laser has a well-defined wave front due to which it can be focused on a point. Lasers are highly intense compared to ordinary light. What […]

Can ice cream go bad if not frozen? Ice cream can last for two to three months beyond the date on the container. Sherbet lasts even longer: three to four months when unopened and two to three months after it has been opened. Ice cream can in fact spoil, although it usually does not sit […]

Does the pressure in a liquid decreases with depth? Pressure and depth have a directly proportional relationship. This is due to the greater column of water that pushes down on an object submersed. Conversely, as objects are lifted, and the depth decreases, pressure is reduced. How does pressure of a liquid depends on its depth? […]