In the olive, seed development plays an important role in fruit growth, the pattern of flower and fruit abscission, and the level of flowering the following year. It is not clear, however, whether the influence of the seed on those processes is due to the embryo or to other components of seed development.

why can the cord be sofely cut once the baby is born

I'm going to buy a baby corn, is it better to start with a small plastic tank rather that a large one partitioned off? and do most people provide a heat gradient with a light or mat? lastly does anyone bother providing timed lighting or use a thermostat...or do most just use a thermometer and alter the things accordingly!?... many questions there & many thanks in advance!

how is a baby corn

Baby corn is a cereal grain taken from specialized corn (maize) plants and harvested early, while the ears are very small and immature. Baby corn ears are hand-picked as soon as the corn silks emerge from the ear tips, or a few days after. Corn generally matures very quickly, so the harvest of baby corn must be timed carefully to avoid ending up with more mature corn ears.

what are contractions

I had a weird cramp last night and it got me thinking... I have no clue what a contraction will feel like. I know obviously that I'll know when I'm in labour, but, last night gave me nearly a bit of a fright, because it felt like what I expect a contraction to feel like.

when the baby is in the womb

During pregnancy, your future child will develop at an astonishing rate. This is an important time to make sure you are eating a healthy diet, taking your prenatal vitamins, and getting good prenatal care. These three steps can help reduce the chance of birth defects and set your baby on the right path to a healthy life.

Dont' let the heat escape!1. lista: a)4 ways in which heat can escape from a house b) 4 ways of prevening heat from escaping.2. Which methods of insulation use trapped air as an insulator?3. Why is aluminum foil fixed above ceilings?4. Explain how heat can escape throught an unused fireplace .5. How much did the black: a) pay for insulation b) save each year?6. a)the black only really began to save money after two years explain this b)how many years passed before the other families,began to save.7. If you had to insulate a house,wich two methods would you use firs,and wity?1/R:b)ways of preveing heat from escaping2/R:any material that conducts heat poorly or electricity and used to suppress the flow.3/R:4/R:the heat comes out through smoke stacks or windows5/R:the blacks put insulation in the loft. they laid shiny alumniun foil above the ceiling6/R:the blacks the browns the greens and the withes had two things in common they lived in he same type of house and had huge heating bills7/R:icopor fiberglass insulation and wood heat things produscan

dont let the heat escape

Dont' let the heat escape!1. lista: a)4 ways in which heat can escape from a house b) 4 ways of prevening heat from escaping.2. Which methods of insulation use trapped air as an insulator?3. Why is aluminum foil fixed above ceilings?4. Explain how heat can escape throught an unused fireplace .5. How much did the black: a) pay for insulation b) save each year?6. a)the black only really began to save money after two years explain this b)how many years passed before the other families,began to save.7. If you had to insulate a house,wich two methods would you use firs,and wity?1/R:b)ways of preveing heat from escaping2/R:any material that conducts heat poorly or electricity and used to suppress the flow.3/R:4/R:the heat comes out through smoke stacks or windows5/R:the blacks put insulation in the loft. they laid shiny alumniun foil above the ceiling6/R:the blacks the browns the greens and the withes had two things in common they lived in he same type of house and had huge heating bills7/R:icopor fiberglass insulation and wood heat things produscan

speed of sound

Speed of sound

U.S. Navy F/A-18 breaking the sound barrier. The white halo is formed by condensed water droplets which are thought to result from a drop in air pressure around the aircraft (see Prandtl-Glauert Singularity).^[3][4]

Main article: Speed of sound

The speed of sound depends on the medium through which the waves are passing, and is often quoted as a fundamental property of the material. In general, the speed of sound is proportional to the square root of the ratio of the elastic modulus (stiffness) of the medium to its density. Those physical properties and the speed of sound change with ambient conditions. For example, the speed of sound in gases depends on temperature. In 20 °C (68 °F) air at the sea level, the speed of sound is approximately 343 m/s (1,230 km/h; 767 mph) using the formula "v = (331 + 0.6T) m/s". In fresh water, also at 20 °C, the speed of sound is approximately 1,482 m/s (5,335 km/h; 3,315 mph). In steel, the speed of sound is about 5,960 m/s (21,460 km/h; 13,330 mph).^[5] The speed of sound is also slightly sensitive (a second-order anharmonic effect) to the sound amplitude, which means that there are nonlinear propagation effects, such as the production of harmonics and mixed tones not present in the original sound (see parametric array).

sound wave properties and characteristics

Sound wave properties and characteristics

Sound waves are characterized by the generic properties of waves, which are frequency, wavelength, period, amplitude, intensity, speed, and direction (sometimes speed and direction are combined as a velocity vector, or wavelength and direction are combined as a wave vector).

Transverse waves, also known as shear waves, have an additional property of polarization.

Sound characteristics can depend on the type of sound waves (longitudinal versus transverse) as well as on the physical properties of the transmission medium^{[citation needed]}.

Whenever the pitch of the sound wave is affected by some kind of change, the distance between the sound wave maxima also changes, resulting in a change of frequency. When the loudness of a sound wave changes, so does the amount of compression in air of the wave that is traveling through it, which in turn can be defined as amplitude.

longitudinal and tranverse waves

Longitudinal and transverse waves

Sinusoidal waves of various frequencies; the bottom waves have higher frequencies than those above. The horizontal axis represents time.

Sound is transmitted through gases, plasma, and liquids as longitudinal waves, also called compression waves. Through solids, however, it can be transmitted as both longitudinal and transverse waves. Longitudinal sound waves are waves of alternating pressure deviations from the equilibrium pressure, causing local regions of compression and rarefaction, while transverse waves in solids, are waves of alternating shear stress.

Matter in the medium is periodically displaced by a sound wave, and thus oscillates. The energy carried by the sound wave converts back and forth between the potential energy of the extra compression (in case of longitudinal waves) or lateral displacement strain (in case of transverse waves) of the matter and the kinetic energy of the oscillations of the medium.

physics of sond

Physics of sound

The mechanical vibrations that can be interpreted as sound are able to travel through all forms of matter: gases, liquids, solids, and plasmas. The matter that supports the sound is called the medium. Sound cannot travel through vacuum.

ligth and sound experiment

Instructions1. Print the picture shown or make your own on paper.2. Glue the picture on some cardboard and allow to dry.3. Piece the middle of the disc with a nail.4. Insert the pencil through the whole and spin the disc.5. What colour do you see?
Back to light and sound experiments
You will need:- Coloured pens, or a colour printer, plus paper.- 1 Nail, pencil, cardboard and glue.
White light is comprised of all the colours of the visible spectrum.More on light by Museum Victoria.i.e. red, orange, yellow, green, blue, indigo and violet... as well as the shades in between.Spinning the disc mixed all the different wavelengths of coloured light together, creating white light. The faster you move the disc, the more white light you see. This process is call colour addition.Colour subtraction occurs when substances that absorb light, such as paint, are mixed together. Mixing coloured paint eventually produces black paint, whereby all visible ligh

energia nuclear