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Assume that Earth and Mars are perfect spheres with radii of 6,371 km and 3,390 km, respectively. a. Calculate the surface area of Earth. b. Calculate the surface area of Mars. c. If 0.72 (72 percent) of Earth's surface is covered with water, compare the amount of Earth's land area to the total surface area of Mars.
a. Surface area of Earth: We'll use the formula $( A = 4 $pi r^2 $) where $( r = 6371 $) km: $[ A_{$text{Earth}} = 4 $times 3.14159 $times (6371)^2 $,...
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A diver goes into a somersault during a dive by tucking her limbs. If her rotational kinetic energy is 100 J and her moment of inertia in the tuck is 9.0 kg·m^2, what is her rotational rate during the somersault?
Rotational Rate During a Somersault Dive To find the rotational rate \( \omega \) during the somersault, we use the formula for rotational kinetic energy: \[ K = \frac{1}{2} I \omega^2 \] Where:...
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it is noticed that major sequence alignments differ in approach computational complexity and accuracy. Do you agree with this? Explain it with examples
There are many algorithms and software programs implemented for the inference of multiple sequence alignments of protein and DNA sequences. Alignment databases provide a source of accurate alignments to gauge...
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Before Gregor Mendel's work with garden peas, he had to ensure what about the plants?
Before Mendel started his experiments, he had to ensure the plants were purebred. He breed a species several times with its own kind to breed out any (or most) foreign...
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in living things,one of this statement is correct
a)waste must be accumulated
b)waste must be recircled
c)waste must be removed
d)waste must be doubled
In all living organisms, wastes should be removed. Other variants do not suit because: Accumulation of wastes may lead to toxic effects and kill the organism. Only some organisms can...
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why do some seeds while it while others don't after they are sold in water in for sometime
The ability of seeds to grow after being put into water also depends on their age. This is because with time the probability of seed germination decreases. Apart of that...
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Mary is in her last month of pregnancy and suffering from lower back pains. since she is carrying her excess load in front of her, she wonders why her back hurts. what would you tell her?
One of the major causes of back pain in pregnant women is the increased production of the hormone relaxin. The hormone stimulates the relaxation of ligaments in the pelvic area...
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Briefly describe what happens once the eudicot seed has accumulated moisture in fertile soil.
Accumulation of water leads to swelling and a softening of a seed’s coat. The processes activate cell respiration, protein synthesis and metabolism of food stores. Next, cell division and elongation occur,...
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why are some barium and calcium salts insoluble while some are soluble??
solubility depends on the substance, some substances can dissolve others not
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Sandra has 500g of water boiling at 99 celsius (C), her recipe calls for water to be at 78C, ice is at 0C, how much ice must she add to cool down the water?
C1 for water =4200 J/kg*K C2 for ice =2100 m1=500 t1=99 t2=0 L=335 kJ/kg m1*c1*(t-t1)=m2*L+m2*c1*(t-t2) m2=66.5
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