4,347 Answered Questions for the topic Science

03/15/21

cell biology course
Why does it take up to a full cell cycle to observe the effects of a temperature-sensitive mutation? This is regarding to yeast strains (cdc13-1) in the CDC13 gene have temperature sensitive... more
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03/15/21

Pessimism is an attitude that looks at the difficult reality in silver lining. True or False?
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03/15/21

A 53kg skateboarder pushes on the ground with -351N of force to set himself moving. How fast will the skateboarder accelerate?
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Science Physics Homework

03/15/21

Calculate the horizontal component of the net force, in newtons, on the charge which lies at the lower left corner of the rectangle.

Four point charges of equal magnitude Q = 55 nC are placed on the corners of a rectangle of sides D1 = 21 cm and D2 = 11 cm. The charges on the left side of the rectangle are positive while the... more
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Science Chemistry

03/15/21

Calorimeter question
A mixture of ammonia, NH3(g), and methane, CH4(g), is burned in an excess of oxygen in a bomb calorimeter. The heat released during this combustion reaction is 1377.65 kJ. If the calorimeter has a... more
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03/14/21

Find the amplitude and frequency of the following waves:
Find the amplitude and frequency of the following waves:20 sin 377t12 sin 2π 120t106 sin 10000t-8 sin 10058t
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Science Physics

03/14/21

Calculate the x-component of the electric field at point P due to charge Q1. Write your answer in units of N/C.

A positive charge of magnitude Q1 = 0.45 nC is located at the origin. A negative charge Q2 = -9.5 nC is located on the positive x-axis at x = 6.5 cm from the origin. The point P is... more
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Science Physics

03/14/21

Calculate the horizontal component of the net force, in newtons, on the charge which lies at the lower left corner of the rectangle.

Four point charges of equal magnitude Q = 55 nC are placed on the corners of a rectangle of sides D1 = 21 cm and D2 = 11 cm. The charges on the left side of the rectangle are positive while the... more
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03/14/21

cell biology course
Propose how you would experimentally determine which X, Y, and Z yeast strains correspond with which UCC strains (names and genotypes given at the bottom end) if you had access to the... more
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03/14/21

Physics question
A cardboard package of mass 2.2 kg is kicked with an initial speed of 5.5 m/s. It slides along a rough horizontal surface and then stops, after travelling 4.2 m. Calculate the frictional force... more
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Science Chemistry

03/14/21

Can someone please help me with this question?
The Kinetic Theory of Matter explains why____A. the atoms in a gas are always in motionB. the atoms in a liquid are always in motionC. the atoms in a solid are always in motionD. All of the aboveE.... more
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03/13/21

SOS! Please help with rate law problem!
Step 1 : A + B → C + E (slow) Step 2 : B + E → D (fast)Predict the rate law if step 1 is slow.
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03/13/21

Find the voltage induced across a coil of 22mH if the rate of change of current through the coil is...
Find the voltage induced across a coil of 22mH if the rate of change of current through the coil is...a.) 1 A/sb.) 1 mA / msc.) 2 mA / 10 μs
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Science Geology

03/13/21

pls help (read desc)
In the Galapagos Islands, finches on different islands have beaks of different shapes, so they can gather the food that grows on the island where they live. Their beaks are examples of which of the... more
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Science Chemistry

03/12/21

Ionic Molecules (PLS HELP)

Give the formula for the Ionic compound that would form from combining the following atoms. 1.) Mg, O 2.) B, Te3.) K,C4.) C,P5.) Al, O 6.) Li, F7.) Ca, B8.) Sr, I 9.) Ga, S 10.) Na, Po
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03/12/21

4. Plants heterozygous for a characteristic that determines petal colour were crossed (AB × AB)
The A allele represents a red phenotype, and the B allele represents a white phenotype. Work out the genotypic numbers if:a. This is an F1 cross. The results will be one AA to two AB to one BB. b.... more
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03/10/21

Order (from most kinetic energy to the least) justify your answer

A 5 kg cat is sitting still on a countertop, watching a fish in a fish tank. The 0.5 kg fish is slowly swimming at 0.1 m/s in the tank. The owner of the pets sees the cat watching and fish and... more
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03/10/21

What is the value of the equilibrium constant, Kc, at this constant temperature?
When 1.50 mol of CO2 and an excess of solid carbon are heated in a 20.0 L container to a high constant temperature, the equilibrium concentration of CO is 0.0776 M.C(s) + CO2(g)  ⇆ 2 CO(g)What is... more
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Science Math Physics

03/10/21

Three resistors (10, 15, and 20 ohms) are connected in parallel to a 24 V source.
Three resistors (10, 15, and 20 ohms) are connected in parallel to a 24 V source. Show all work for credit.What is the voltage drop across each resistor?What is the current through each... more
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Science Math Physics

03/10/21

Three resistors (5, 10, and 15 ohms) are connected in series to a 12 V source.
Three resistors (5, 10, and 15 ohms) are connected in series to a 12 V source. All work must be shown.What is the equivalent resistance of the circuit?What is the current through the battery?What... more
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Science Chemistry

03/09/21

Half-Lives and Radioactivity
50.0mg of potassium-45 was isolated in pure form. After one hour, only 3.125mg of the radioactive material was left. What is the half-life of potassium-45?
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03/08/21

. If you know a fluid balance chart is accurate, would it concern you if a patient appeared to be 1L positive each day. Give the reason for your answer
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03/08/21

How much water do we lose per day?
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03/08/21

State the 3 ways by which we acquire water
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03/08/21

1. Explain why some substances are secreted from the blood into the filtrate as it passes along the tubule and why does this vary.
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