Category: Physics

What is the difference between lift and drag force? Lift is the force that acts at a right angle to the direction of motion through the air. Lift is created by differences in air pressure. Drag is the force that acts opposite to the direction of motion. Drag is caused by friction and differences in […]

What happens if you cut the stem of a plant? When a flower’s stem is cut, it is abruptly severed from its support system–namely, the roots of the plant. This is a shock to the flower’s system. Once the stem is cut, there is no way for the plant to get minerals from the soil, […]

Does Mars have high radiation? Radiation on Mars Mars’s surface receives more radiation than the Earth’s but still blocks a considerable amount. Radiation exposure on the surface is 30 µSv per hour during solar minimum; during solar maximum, dosage equivalent of this exposure is reduced by the factor two (2). Do cell phones affect your […]

Why do veins carry blood at low pressure? The walls of veins have the same three layers as the arteries. Although all the layers are present, there is less smooth muscle and connective tissue. This makes the walls of veins thinner than those of arteries, which is related to the fact that blood in the […]

Why do plants grow best under blue light? Blue light produces more lush greenery. Blue light is necessary for plants to regulate plant growth, as it helps to create strong stems and also helps create the chlorophyll necessary for plant processes. In other words, the chlorophyll in the plant absorbs the red and blue light […]

Do blood transfusions affect immune system? Patients often develop antibodies to transfused red blood cells making it more difficult to find a match if future transfusions are needed. Transfused blood also has a suppressive effect on the immune system, which increases the risk of infections, including pneumonia and sepsis, he says. Can you get an […]

What happens when you cover a slit? When one of the slits is covered, the fringes disappear and there is uniform illumination on the screen. This shows clearly that the bands are due to interference. In such condition, the double slit experiment becomes single slit experiment. What happens if one slit is covered in YDSE? […]

Is a veterinary assistant a good job? The outlook is good for veterinary assistants, with a projected growth rate of 36 percent, or 28,500 new jobs, by 2018. Veterinary assistants have no formal educational requirements, and they usually receive training and experience on-the-job. What’s the difference between veterinary assistant and technician? Job Description However, vet […]

What is the formula for amplitude of a wave? To find the amplitude, wavelength, period, and frequency of a sinusoidal wave, write down the wave function in the form y(x,t)=Asin(kx−ωt+ϕ). The amplitude can be read straight from the equation and is equal to A. The period of the wave can be derived from the angular […]

What does it mean to say an organization is an open system? In management, an open system is one where a company functions while becoming increasingly mixed and complex due to its growing relationship with its environment. For an effective open system, an organization needs to manage the resources flowing into the company and out […]