Explain what is a positron?
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Why are glaciers formed ?
Why does heated air expand?
Order the following from the worst electrical conductor to the best electrical conductor? Glass, rubber, iron, dry wood
hmmm by using of our saliva we can produce current?
How d o the radio-waves pass through walls ?
How does a sound wave travel in air?
What is the ray of light?
For two objects separated by a distance d, if the mass of one of the objects is doubled, what will happen to the gravitational attraction between them?
What is pascal s principle?
Why does and electric bulb make a bang or loud noise, when it is broken ?
What is the difference between Centigrade thermometer and a Reaumer thermometer ?
Giraffe in Arabic means "the highest of all." The height of a giraffe is an average of 5 m, its mass is about 800 kg and hooves is an area of approximately 625 cm2. Using a straw from a material nedeformabil a giraffe trying to drink water from a lake, not to condescend. What is the ratio of the minimum pressure to be applied giraffe, mouth, at the end paiului to drink water and pressure of giraffe on the ground. The density of water. g = 10 m/s2