Briefly explain why you might expect neoplastic cells in a
primary tumor to be more heterogeneous to each other (especially in
terms of mutations) as compared to the neoplastic cells in a
metastasis.
1.explain why it is more efficient to make several
extraction using small portions rather than one extraction.
2.defined drying agent intensity
3.defined drying agent capacity
4.what is the upper layer in each mixed solvents
a-water and benzene
b-water and ether
c-water and carbon tetrachloride
5.write an equation for this reaction of benzoic acid with aqueous
sodium bicarbonate
Thermal Storage Solar heating of a house is
much more efficient if there is a way to store the thermal energy
collected during the day to warm the house at night. Suppose one
solar-heated home utilizes a concrete slab of area 14 m2 and 21 cm
thick.
A) If the density of concrete is 2400 kg/m3, what is the mass of
the slab?
Express your answer to two significant figures and include
appropriate units.
b)
The slab is exposed to...
Thermal Storage Solar heating of a house is much more efficient
if there is a way to store the thermal energy collected during the
day to warm the house at night. Suppose one solar-heated home
utilizes a concrete slab of area 13 m2 and 29 cm thick.
If the density of concrete is 2400 kg/m3, what is the mass of
the slab?
The slab is exposed to sunlight and absorbs energy at a rate of
1.4 ×107J/h for 10 h....
1. Silicon is the main ingredient of both glass and
semiconductor materials. Why are the physical properties of glass
different from those of semiconductors?
1. The silicon atoms in semiconductors are bonded with oxygen
atoms to form a crystal; in semiconductors the silicon is pure and
thus forms the amorphous structure.
2. Silicon has no effect on the properties of glass and
semiconductors.
3. The silicon atoms in semiconductors form a crystal; in glass
they are bonded with oxygen atoms...