What are the classes of dangerous goods? What are dangerous goods? Class 1: Explosives. Class 2: Gases. Class 3: Flammable liquids. Class 4: Flammable solids; substances liable to spontaneous combustion; substances which, on contact with water, emit flammable gases. Class 5: Oxidizing substances and organic peroxides. Class 6: Toxic and infectious substances. Class 7: Radioactive […]
What does the radial velocity method measure?
What does the radial velocity method measure? The radial velocity technique is able to detect planets around low-mass stars, such as M-type (red dwarf) stars. This allows astronomers to determine the inclination of the planet’s orbit, which enables the measurement of the planet’s actual mass. Why is the radial velocity method biased towards high mass […]
What is killing the coral reefs?
What is killing the coral reefs? Despite their importance, warming waters, pollution, ocean acidification, overfishing, and physical destruction are killing coral reefs around the world. Genetics is also becoming a larger area of coral research, giving scientists hope they might one day restore reefs with more heat tolerant coral. How are humans killing coral reefs? […]
How do I put negative ions in my house?
How do I put negative ions in my house? Along with spending more time in nature, here are some other creative activities you can do to generate negative ions right in your home or office environment: Use a negative ion generator. Operate a Himalayan salt lamp wherever you spend a good deal of time in […]
What are positive and negative coping skills?
What are positive and negative coping skills? Positive coping mechanisms include seeking help from supportive people, such as a counselor or friend. Other positive ways to cope include meditation, journaling, and exercising. A negative coping mechanism includes stress in which a person attacks others and makes them uncomfortable. What are some good coping skills? Good […]
What are the 3 types of genetic variation?
What are the 3 types of genetic variation? For a given population, there are three sources of variation: mutation, recombination, and immigration of genes. What would happen if there was no genetic variation? Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk […]
Can a body have zero velocity and still acceleration give example?
Can a body have zero velocity and still acceleration give example? Yes, a body with a velocity 0 can still accelerate. The simplest example is a body which is thrown up. At the peak point its velocity becomes 0 but still accelerates due to gravity. How can you have acceleration but no velocity? Since acceleration […]
How do you reduce standing waves?
How do you reduce standing waves? Low end sounds create standing waves when the reflected sound between walls is directly opposite in phase. By cutting the frequency, you can eliminate the problem. What are the effects of harmonics? Effects of harmonics in the power system Increase in installation and utility costs. Downtime and loss of […]
Can a vector have a negative direction?
Can a vector have a negative direction? Vectors having the same length as a particular vector but in the opposite direction are called negative vectors. The magnitude, or length, of a vector, cannot be negative; it can be either be zero or positive. The negative sign is used here to indicate that the vector has […]
What is it called when the server misses the serve in tennis?
What is it called when the server misses the serve in tennis? Singles – a tennis game played by two players. Second Service – the second serve that the server is allowed after missing the first serve. This serve must be successful or the server will lose the point (called a double fault). What is […]