Category: Physics

Can a body have zero velocity and finite acceleration? This acceleration is the gravitational acceleration. At that point the component of acceleration/gravitational acceleration works there. So, at the topmost point the velocity is zero but acceleration is not and has a finite value. Therefore, a body can have zero velocity and finite acceleration. Is it […]

What is a very abundant bird species of late 19th century is totally extinct? The last confirmed wild bird is thought to have been shot in 1901….Passenger pigeon. Passenger pigeon Temporal range: 5.333–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N Zanclean-Holocene Extinct (1914) (IUCN 3.1) Scientific classification Kingdom: Animalia […]

What is the phase difference between current and voltage in a capacitor? A capacitor is a device for storing charging. It turns out that there is a 90° phase difference between the current and voltage, with the current reaching its peak 90° (1/4 cycle) before the voltage reaches its peak. How does a capacitor shift […]

What does rotational inertia depend on? mass What happens when rotational inertia increases? Objects with mass require forces to make them speed up or slow down because they have inertia. An object with more rotational inertia is harder to accelerate. Any object with mass will have rotational inertia, and this makes it harder to speed […]

What are the negative effects of melatonin? Melatonin has been used safely for up to 2 years in some people. However, it can cause some side effects including headache, short-term feelings of depression, daytime sleepiness, dizziness, stomach cramps, and irritability. Do not drive or use machinery for four to five hours after taking melatonin. Does […]

Why do grasshoppers live in grass? Grass. Grasshoppers are drawn to patches of grass for several key reasons, chiefly because it is a main source of nutrition for them. They also lay their eggs in the soil under the grass, which is why your green carpet of lawn is an ideal spot for these winged […]

How do you calculate the effusion of a gas? From Graham’s law, we can use the molar mass of each gas: rate of effusion of hydrogenrate of effusion of oxygen=√32g mol−1 √2g mol−1 =√16√1=41 rate of effusion of hydrogen rate of effusion of oxygen = 32 g mol − 1 2 g mol − 1 […]

What hormones do males and females have in common? Generally, females and males have the same hormones (i.e., estrogens, progesterone, and testosterone), but their production sites, their blood concentrations, and their interactions with different organs, systems, and apparatus are different [29]. What hormone does both sexes produce? Testosterone is produced by the gonads (by the […]

Can an optometrist tell if you have cataracts? Eye cataracts can be diagnosed by an optometrist or an ophthalmologist by performing a series of tests, usually included in a comprehensive eye examination. Can an eye doctor tell if you do drugs? All of the major drugs of abuse, including cocaine, marijuana, amphetamine, phencyclidine, heroin, and […]

What is the most important action for all students to take to stay safe in a science lab? What is the most important action for all students to take to stay safe in a science lab? Follow all instructions that are given by the teacher. What is most likely to be observed by a physiologist? […]