Why is poverty a threat? The indignity and sufferings of people living in poverty is a humanitarian tragedy. It is a challenge putting pressure on all societies. Poverty is the root cause of many problems, posing a severe and distinct threat to food security, climate change resilience, insecurity, democracy, human rights amongst others. What poverty […]
Which of the following best describes a difference between artificial and natural selection?
Which of the following best describes a difference between artificial and natural selection? The following statement best describes the difference between artificial and natural selection: Natural selection acts without the input of humans: artificial selection requires human input. only via natural selection, genetic drift, migration, or mutation. Which best describes the role of mutations in […]
What is the highest sea level in history?
What is the highest sea level in history? The current sea level is about 130 metres higher than the historical minimum. Historically low levels were reached during the Last Glacial Maximum (LGM), about 20,000 years ago. The last time the sea level was higher than today was during the Eemian, about 130,000 years ago. Will […]
Does spring constant depend on gravity?
Does spring constant depend on gravity? Gravity has nothing to do with the spring constant. It can only effect the net force on the spring depending on the orientation of the spring. If the spring is oriented horizontally, gravity has no effect. Does spring constant change with compression? The proportional constant k is called the […]
When carbon reacts with a small amount of oxygen?
When carbon reacts with a small amount of oxygen? When carbon is oxidized in a small amount of oxygen, the principle product formed is carbon monoxide (CO), when the oxidation occurs in a higher concentration of oxygen, the principle product formed is carbon dioxide (CO2). What happens when carbon reacts with excess of oxygen? Carbon […]
How does frequency affect interference?
How does frequency affect interference? A higher frequency corresponds to a shorter wavelength. Waves of shorter wavelength spread out (diffract) less after passing through the slits, and the short wavelength leads to a smaller angle at which constructive interference (one wavelength path difference between the two waves) will occur. What is interference effect? Interference, in […]
What are disadvantages of modeling?
What are disadvantages of modeling? Disadvantages of modelling and simulation Mistakes may be made in the programming or rules of the simulation or model. The cost of a simulation model can be high. The cost of running several different simulations may be high. Time may be needed to make sense of the results. What are […]
How can I strengthen my heart?
How can I strengthen my heart? Top 10 healthy heart tips Give up smoking. If you’re a smoker, quit. Get active. Getting – and staying – active can reduce your risk of developing heart disease. Manage your weight. Being overweight can increase your risk of heart disease. Eat more fibre. Cut down on saturated fat. […]
When the concentration of solute inside and outside a cell is the same?
When the concentration of solute inside and outside a cell is the same? Tonicity and cells Tonicity of solution Solute concentration Water moves… Hypertonic Higher solute in solution than in cell Out of the cell Isotonic Equal amounts of solute in cell and solution Into and out of cell at the same time Hypotonic Lower […]