What is a magnetic field how can the direction? the magnetic fields are the imaginary line which moves from south to north. this lines do not overlap each other. we can find the direction of the magnetic field lines by keeping a compass near to it. Why do 2 magnets repel or attract each other? […]
What are the 8 lab safety rules?
What are the 8 lab safety rules? General Laboratory Safety Rules Know locations of laboratory safety showers, eyewashstations, and fire extinguishers. Know emergency exit routes. Avoid skin and eye contact with all chemicals. Minimize all chemical exposures. No horseplay will be tolerated. Assume that all chemicals of unknown toxicity are highly toxic. What are the […]
What is light quality?
What is light quality? Light quality is the wavelength (in nanometers, nm) within the electromagnetic spectrum; i.e. blue light is 450 nm and red light is 650 nm. Each wavelength has a different packet of radiation or energy (in J mol-1) called photons. What type of light causes damage to plants? UV-B radiation has been […]
How accurate are dial calipers?
How accurate are dial calipers? Quality dial, Vernier or digital calipers can all return an accuracy of about 0.001 inch over 6 inches if correctly used, although the accuracy is likely to diminish over longer spans. What are the 3 ways a dial caliper can be used to measure? There are 4 measurements you can […]
What is homeostasis in cells?
What is homeostasis in cells? In biology, homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). What is homeostatic imbalance […]
What will happen when a force is applied on a moving object against the direction of motion?
What keeps the moon moving in a circular motion?
What keeps the moon moving in a circular motion? Gravitational attraction provides the centripetal force needed to keep planets in orbit around the Sun and all types of satellite in orbit around the Earth. The Earth’s gravity keeps the Moon orbiting us. It keeps changing the direction of the Moon’s velocity. What changes continuously in […]
What is another word for centi?
What is another word for centi? a combining form meaning “hundredth” or “hundred,” used in the formation of compound words: centiliter; centimeter; centipede. What does centi mean in Latin? Centi (symbol c) is a unit prefix in the metric system denoting a factor of one hundredth. Proposed in 1793, and adopted in 1795, the prefix […]
Do sponges have a heart?
Do sponges have a heart? In summary, sponges – or poriferans – do not have a true circulatory system as most animals do. There is no heart, there are no veins or arteries, and sponges do not have blood. Water is pulled into the sponge via internal choanocyte cells, which take in water through the […]
Which of the following is the weakest bond?
Which of the following is the weakest bond? (a) H-bond is only an interaction between electronegative element and hydrogen therefore, it is the weakest bond among all. Why is Bond making exothermic? Bond forming is an exothermic process, because it releases energy. In reaction profile diagram, the energy change in a reaction, is the difference […]