Category: Physics

Which motor can rotate in both directions? DC motors How can the direction of DC motor be changed? We can change the direction of DC motor 1) by changing the polarity of applied field voltage. 2) by changing the polarity of the applied voltage to the armature winding. 3) if we change both of the […]

What force twists a material by turning the ends in opposite directions? Torsion forces twist a material by turning the ends in opposite directions. What is internal and external force? • Internal Forces: Forces which act on one part of an object. by another part of the same object. • External Forces: Forces which act […]

Is nickel a Semimetal? Five common metals are copper, lead, tin, nickel, and zinc. Four common nonmetals are sulfur nitrogen, selenium, and bromine. The seven metalloids are boron, silicon, germanium, arsenic, antimony, tellurium, and polonium. The three types of elements occupy their own places in the Periodic Table. What is the meaning of ductile? : […]

What is line shape in laser? When a radiation is incident the strength of interaction of this energy state with radiation is a function of frequency. This function is called the line shape function. The line shape function is represented by g( ). This function is usually normalized according to the relation. What is the […]

Can water wick up hill? yes it can! In some ways anyway; water can travel upwards by a process called capillary action. Capillary action can be described as water climbing upwards due to weak forces created between the water molecules and the material the water moves up along, or through. Do wicking beds really work? […]

Is there undersea landslide? Underwater landslides are common features on steep continental margins. Underwater (also called submarine) landslides rapidly shape the seafloor environment by transferring large quantities of sediment and rock downslope from the continental shelf into the deep ocean. Has Texas ever had a tsunami? Today, 3 News sat down with a geologist at […]

What is risk allele frequency? risk allele: in the context of a disease, this is the allele that confers a risk of developing the disease. Most of the time, risk allele = minor allele, as most people will not carry the risk allele. How do you find the frequency of a dominant and recessive allele? […]

Is breathing completely involuntary? Breathing is a complex motor task that needs to be coordinated at all times while we eat, speak, exercise and even during sleep. The breathing muscles are controlled automatically from the brainstem during normal breathing but can also be controlled voluntarily from the motor cortex. What is the structure of a […]

What sound frequency travels the farthest? In general, low frequency waves travel further than high frequency waves because there is less energy transferred to the medium. Does bass travel up or down? In short, sound is omnidirectional, meaning that it can travel in all directions, including up and down. So, as you can see, while […]

What is the compression ratio for 93 octane? 9.5:1 What is the best compression ratio for a turbo engine? How much compression does a turbo add? Turbos typically add about 10 to 15 psi boost which is about 1 atmosphere pressure (1 atmosphere is 14.5 psi), so air enters the cylinders at a maximum pressure […]