Which best describes thermionic emission? Thermionic emission is the emission of electrons from a heated metal (cathode). As the temperature increases, the surface electrons gain energy. The energy acquired by the surface electrons allows them to move a short distance off the surface thus resulting in emission. Where is the focusing cup located? A focusing […]
What are the 10 components of physical fitness and their examples?
What are the 10 components of physical fitness and their examples? Knowledge is Power: 10 Physical Fitness Components Cardiovascular/Respiratory Endurance. Definition: The ability of body systems to gather, process, and deliver oxygen. Stamina. Definition: The ability of body systems to process, deliver, store, and utilize energy. Strength. Flexibility. Power. Speed. Coordination. Agility. Which fitness component […]
What can atoms do to achieve stability?
What can atoms do to achieve stability? To achieve greater stability, atoms will tend to completely fill their outer shells and will bond with other elements to accomplish this goal by sharing electrons, accepting electrons from another atom, or donating electrons to another atom. Why do atoms need 8 electrons to be stable? A complete […]
In what way can we reduce road accidents?
In what way can we reduce road accidents? Ten Ways to Avoid Car Accidents Pull into traffic slowly. Stop, Look, Listen. Watch for red light runners. Count to three before entering an intersection on a green light. Keep at least one hand on the steering wheel. Watch for kids. Perform engine maintenance regularly. Scan 12 […]
What is the process of a muscle contraction?
What is the process of a muscle contraction? Muscle contraction occurs when the thin actin and thick myosin filaments slide past each other. It is generally assumed that this process is driven by cross-bridges which extend from the myosin filaments and cyclically interact with the actin filaments as ATP is hydrolysed. What determines the strength […]
Which group is very unreactive?
Which group is very unreactive? noble gases Why does group 18 have no charge? Noble gases are relatively inert and nonreactive due to their full outer shell of electrons. Having a full valence shell of 8 electrons means that the atom is already in its most stable state, and thus, there is no need for […]
What is the #1 cancer killer?
What is the #1 cancer killer? According to the American Cancer Society, lung cancer — and lung cancer caused by asbestos — is the number one killer, with 142,670 estimated deaths in 2019 alone, making it three times deadlier than breast cancer. What’s the most curable cancer? What are the most curable cancers? Breast cancer. […]
What is a quantized value?
What is a quantized value? Quantized: In quantum mechanics, the concept that a system cannot have any possible energy value but instead is limited to certain specific energy values (states). The states depend on the specific system in question. How is a piano An example of a quantized system? When you play a piano, you […]
What will be my mass if my weight is 50 kg?
What will be my mass if my weight is 50 kg? However, WEIGHT does vary given the gravitational well. A mass of 50⋅kg has a WEIGHT of 50⋅kg×9.81⋅N⋅kg−1=490.5⋅N on the earth, but a weight of 50⋅kg×1.622⋅N⋅kg−1=81.1⋅N on the moon…… What is a healthy weight for a 4 11 female? Height and Weight Chart Height Weight […]
Why does temperature increase as pressure increases?
Why does temperature increase as pressure increases? The temperature of the gas is proportional to the average kinetic energy of its molecules. Faster moving particles will collide with the container walls more frequently and with greater force. This causes the force on the walls of the container to increase and so the pressure increases. What […]