Is anyone lost in space? A total of 18 people have lost their lives either while in space or in preparation for a space mission, in four separate incidents. Given the risks involved in space flight, this number is surprisingly low. The two worst disasters both involved NASA’s space shuttle. What are the risks of […]
What are two main sources of the sediment that rivers and streams carry?
What are two main sources of the sediment that rivers and streams carry? The two main sources of the sediment carried by the streams and rivers are from the mass movement and runoff. What is the largest river on Earth? Nile River Which is the smallest river in the world? Roe River Which country has […]
What are the basic differences and similarities between a generator and an electric motor What are the basic differences and similarities between a generator and an electric motor?
What are the basic differences and similarities between a generator and an electric motor What are the basic differences and similarities between a generator and an electric motor? Both the motor and generator are similar in construction; they consist of a stator and rotor parts. However, in a motor, electrical energy is the input, while […]
How long do atoms live for?
What is flux in electric field?
What is flux in electric field? Electric flux, property of an electric field that may be thought of as the number of electric lines of force (or electric field lines) that intersect a given area. The negative flux just equals in magnitude the positive flux, so that the net, or total, electric flux is zero. […]
Do bulbs in series have the same brightness?
Do bulbs in series have the same brightness? Placing cells in series increases the voltage in the circuit by 1.5 V for each cell. Increasing the number of bulbs in a series circuit decreases the brightness of the bulbs. In a series circuit, the voltage is equally distributed among all of the bulbs. Bulbs in […]
What are the sources of error in this experiment?
What are the sources of error in this experiment? You are measuring against a standard, using an instrument that can never perfectly duplicate the standard, plus you’re human, so you might introduce errors based on your technique. The three main categories of errors are systematic errors, random errors, and personal errors. What is meant by […]
What is the purpose of a spectrograph?
What is the purpose of a spectrograph? A spectrograph is an instrument that separates incoming light by its wavelength or frequency and records the resulting spectrum in some kind of multichannel detector, like a photographic plate. Many astronomical observations use telescopes as, essentially, spectrographs. What are spectral features of an image? Spectral features of images, […]
What are the negative effects of the atmosphere?
What are the negative effects of the atmosphere? Acid rain, climate change and smog all damage the Earth surface. Contaminated water and gases seep into the earth, changing the composition of soils. That directly affects agriculture, changing crop cycles and the composition of the food we all eat. How do humans affect the atmosphere? Humans […]
What happens to the electrons in the anode?
What happens to the electrons in the anode? In electrochemistry, the anode is where oxidation occurs and is the positive polarity contact in an electrolytic cell. At the anode, anions (negative ions) are forced by the electrical potential to react chemically and give off electrons (oxidation) which then flow up and into the driving circuit. […]