Category: Physics

What type of movement is exhibited at the knee joint? The knee joint is a hinge type synovial joint, which mainly allows for flexion and extension (and a small degree of medial and lateral rotation). It is formed by articulations between the patella, femur and tibia. What are the 7 principles of biomechanics? Seven Principles […]

Are GMOs safe? The U.S. Food and Drug Administration (FDA), U.S. Environmental Protection Agency (EPA), and U.S. Department of Agriculture (USDA) ensure that GMOs are safe for human, plant, and animal health. Is GMO free the same as organic? The use of genetic engineering, or genetically modified organisms (GMOs), is prohibited in organic products. This […]

Where can we see reflections? What you see is a reflection of your face in the mirror. We also see reflections of other objects that are in front of the mirror. An image can be seen in the mirror because the light reflected from an object falls on the mirror and it is reflected. How […]

Is minutes a metric unit? Metric time is the measure of time intervals using the metric system. Other units of time: minute, hour, and day, are accepted for use with SI, but are not part of it. What if time were metric? A proper metric system for time would probably drop the use of hours, […]

How do we affect the atmosphere? There is substantial evidence that human activities, especially burning fossil fuels, are leading to increased levels of carbon dioxide and other greenhouse gases in the atmosphere, which in turn amplify the natural greenhouse effect, causing the temperature of the Earth’s atmosphere, ocean and land surface to increase … How […]

How do rocks play an important role in formation of soil? They help in the formation of soil through a process called weathering. The type of soil under your feet is dependent on the bedrock deep below the surface. As the bedrock breaks down, smaller pieces move to the surface and mix with the existing […]

What is the purpose of permanent magnet generator? A permanent magnet generator is a device that converts mechanical energy to electrical energy. In this device the rotor windings have been replaced with permanent magnets. These devices do not require a separate DC supply for the excitation circuit or do they have slip rings and contact […]

What happens to kinetic energy when mass is constant and speed is tripled? 1 Expert Answer a)So if the mass triples then the KE triples too. The relationship between Kinetic Energy and velocity is also directly proportional but with the square of the velocity. Hence, KE is 9 times greater. What will be the kinetic […]

Why do people love to be hated? People want a scapegoat A lot of people join hate groups because it allows them to funnel the blame for all of their problems into another group of people while being supported by a group of people who share their beliefs and make them feel like they belong. […]

Is it better to get a perm with clean or dirty hair? A: Actually, before any perm service you want to clean the hair thoroughly. Not washing the hair prior to a perm service can result in poor perm results. Oils and product build-up can prevent the waving lotion from penetrating the hair shaft and […]