Category: Physics

What are the main points of the cell theory? The generally accepted parts of modern cell theory include: All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms. How does […]

What minerals are in a sedimentary rock? Thus, of the eight common igneous minerals, only quartz, K-feldspar, and muscovite are commonly seen in sedimentary rocks. These minerals are joined in sedimentary rocks by clay minerals, calcite, dolomite, gypsum, and halite. The clay minerals form during mineral weathering. What kind of rock is granite? igneous rock […]

How do you get rid of cobwebs permanently? Sweep the cobwebs away: This is a simple tip that will help you quickly get rid of cobwebs. With your broom simply sweep away the webs and your home will be spider free. Spray them down with a water hose: If you have spider webs hanging on […]

What tools are required to detect gamma rays? Silicon detectors are most heavily used in charged-particle spectroscopy and are also used for Compton- recoil spectroscopy of high-energy gamma rays. Other solid-state detection media besides germanium and silicon have been applied to gamma-ray spectroscopy. Where do gamma rays come from? Gamma rays originate from the settling […]

What is the 7 minutes of terror? Unpredictable weather events, especially dust storms, are one reason landing accuracy has suffered in previous missions. NASA engineers call the entry, descent and landing phase (EDL) of Mars entry missions the “seven minutes of terror”. In just seven minutes there are myriad ways entry can fail. How do […]

Do any animals use electricity? They pick up tiny electric pulses from the active muscles of fish. Other fish, such as electric eels, have special cells in their body that produce strong electric discharges. Electric eels can use these discharges to electrocute other fish, and to give humans a nasty jolt. What fish can shock […]

Do I need a resistor to charge a capacitor? Step 3) To begin charging the capacitor you need either a test light or a resistor. Often times these are included with the purchase of a capacitor but can be purchased separately if necessary. A) Using a Test Light: A test light is the simplest way […]

What factors affect the power of the river to cause erosion? The power of a river to cause erosion and carry sediment depends on several factors. A rivers slope, volume of flow, and the shape of its stream bed all affect how fast the river flows and how much sediment it can erode. A fast-flowing […]

Why is it called a morning star? Why is this called a morning star? Because the orb thing looks like a planet? That is a flail, not a morning star. Morning stars are more mace like with a solid body and no chain, flails such as the one pictured were most likely not real weapons […]

Which neurotransmitters are classified as monoamines? Monoamines refer to the particular neurotransmitters dopamine, noradrenaline and serotonin. Dopamine and noradrenaline are sometimes also referred to as catecholamines. Is Serotonin an excitatory or inhibitory neurotransmitter? Serotonin. Serotonin is an inhibitory neurotransmitter that is involved in emotion and mood, balancing excessive excitatory neurotransmitter effects in your brain. Serotonin […]