Category: Physics

Which ice shape lasts longest? Rate of heat dissipation is proportional to surface area. A sphere has the smallest surface area to volume. A spherical ice “cube” would stay frozen the longest. Why is cubed ice better than crushed? Its only advantage is that it cools liquid more quickly. There’s more surface area, which means […]

What is the difference between a cast fossil and a mold fossil? Fossil molds and casts preserve a three-dimensional impression of remains buried in sediment. The mineralized impression of the organism left in the sediment is called a mold. The mineralized sediment that fills the mold recreates the shape of the remains. This is called […]

What happens in cell to cell communication? Cells transmit and receive signals acquired from fellow cells or by the environment surrounding the cell. The signals are transmitted across the cell membrane to prompt a response. The signal can cross the membrane itself, or it can interact with receptor proteins that contact both the interior and […]

Is it safer to hit a car or tree? Trees do not crumple, they do not give way. Hitting a large tree is far more likely to kill you than hitting a car at the same speed. If you have to choose between a oncoming car and a stationary object then choose the stationary object. […]

How do you know if someone is dissociating? Some common signs and symptoms of being in a dissociate state can be: spacing out. glazed, blank look/ staring. mind going blank. mind wandering. a sense of the world not being real. watching yourself from seemingly outside of your body. detachment from self or identity. out of […]

Can we run out of freshwater? While our planet as a whole may never run out of water, it’s important to remember that clean freshwater is not always available where and when humans need it. In fact, half of the world’s freshwater can be found in only six countries. More than a billion people live […]

What is error data? A condition in which data on a digital medium has been altered erroneously. The error can manifest as several incorrect bits or even a single bit that is 0 when it should be 1 or vice versa. See parity checking. How can we avoid data entry error? 10 Tips to Prevent […]

What kind of poem only has 3 lines? tercet What is a poem with 10 lines called? a decastich, a poem in 10 lines. What do you call a stanza with 7 lines? A seven-line stanza is known as a ‘septet. ‘ One specific type of septet which has been given a special name is […]

What is the safest imaging technique? Ultrasound is the safest known medical imaging modality and can be used by nearly every patient with little to no risk. Ultrasound is safe for even unborn fetuses and those who cannot use other modalities. What is a general imaging exam? A type of test that makes detailed pictures […]

What stage are seeds formed? Seeds are the product of the ripened ovule, after fertilization by pollen and some growth within the mother plant. The embryo is developed from the zygote and the seed coat from the integuments of the ovule. How fruits and seeds are formed Class 7? Fruits and Seed Formation After fertilisation, […]