4,374 Answered Questions for the topic Science

Science Biology Genetics

12/15/20

Genetics Cross Chart Question
In cross between a tall pea plant and a short plant, 60 plants were produced, 28 of which were tall and 32 were short. What are the genotypes of the parent plants? T represents the allele for... more
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Science Math Chemistry

12/15/20

calculating fluids?
I have to do a math problem that requires to calculate fluid. I'm not sure what i did wrong or if i missed a step in this calculation.The doctor orders 6 mEq of potassium chloride (20 mEq/10 mL)... more
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12/14/20

I'm very confused about this please help! (Hess Law)
Using the equations 2 C₆H₆ (l) + 15 O₂ (g) → 12 CO₂ (g) + 6 H₂O (g)∆H° = -6271 kJ/mol 2 H₂ (g) + O₂ (g) → 2 H₂O (g) ∆H° = -483.6 kJ/mol C (s) + O₂ (g) → CO₂ (g) ∆H° = -393.5 kJ/mol Determine the... more
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Science Math Chemistry

12/14/20

2A + 3B → 4C At a certain point during the reaction shown above, the rate of appearance of C is measured to be 0.533 M/s. At this same point, what is the rate of the reaction?
2A + 3B → 4CAt a certain point during the reaction shown above, the rate of appearance of C is measured to be 0.533 M/s. At this same point, what is the rate of the reaction?
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12/12/20

Why does tension increase with decreasing period?
A student can’t use a yoyo very well, so they swing it around their head in a horizontal circle. They notice the faster they swing it, the more tension there is in the string. They hypothesize that... more
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Science Math Physics

12/11/20

5 Part Physics Question - Could somebody please help, please explain your answers to me, it would help me a lot
Caleb, an honor Chemistry student, went a ski trip with his friends to the Widham Ski Resort inNY. The careful Caleb chose one of blue routes to do downhill skiing, which is 30o slope, 100 mhigh,... more
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Science Math Physics

12/11/20

5 Part Physics Question - Could somebody please help, please explain your answers to me, it would help me a lot
Three blocks move on a surface with μs = 0.6 and μk = 0.4 as shown below. Jennifer, anotherhonor chemistry student, applied 34 N of force to move the system of three blocks, but shefailed. Assume... more
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Science

12/10/20

Is the observation "The plant has 7 strawberries on it" a quantitative or a qualitative observation?
Is the observation "The plant has 7 strawberries on it" a quantitative or a qualitative observation?quantitativequalitativebothneither
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12/10/20

Compute the frequency (in MHz) of an EM wave with a wavelength of 5.3 in. (0.1346 m).
Compute the frequency (in MHz) of an EM wave with a wavelength of 5.3 in. (0.1346 m).
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12/10/20

how many turns are there in the output coil?
The charger cord used to recharge a cell phone contains a transformer that reduces 120 V AC to 4 V AC. For each 1,225 turns in the input coil, how many turns are there in the output coil?
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12/10/20

What is the temperature inside the furnace?
The blackbody radiation emitted from a furnace peaks at a wavelength of 4.1  10-6 m (0.0000041 m). What is the temperature inside the furnace?
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12/10/20

how many turns must there be in the output coil?
The generator at a power plant produces AC at 19,000 V. A transformer steps this up to 355,000 V for transmission over power lines. If there are 1,850 turns of wire in the input coil of the... more
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12/10/20

How much energy does it use during 20 min of operation?
The resistance of an electric heater is 85 Ω when connected to 120 V. How much energy does it use during 20 min of operation?
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12/10/20

 What is the current?
A lightning stroke lasts 0.03 s and involves a flow of 106 C.A lightning stroke lasts 0.03 s What is the current?
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12/10/20

Physics Conservation of Momentum
A red ball with a mass of 5 kg sits at rest on the gym floor. YOU roll a blue ball, with a mass of 20 kg, into the red ball. This blue ball is moving at 2 m/s before the collision. After the... more
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Science Math Physics Maths

12/10/20

Could somebody please help, I don't even know where to start with this. Please explain your answers to me, it would help me a lot
Two masses (m1 = 2.0 kg, m2 = 4.0 kg) are each initially 2.0 m above the table, and the masslessfrictionless pulley is 6.0 m above the table.(a) What’s the acceleration of the mass 2?(b) What’s the... more
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12/09/20

How much energy does it use in 50 min?
An electric clothes dryer is rated at 2,900 W. How much energy does it use in 50 min?
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12/09/20

What is its power consumption when the current flowing through the train's motor is 1,970 A?
An electric train operates on 875 V. What is its power consumption when the current flowing through the train's motor is 1,970 A?
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12/09/20

What is the eel's power output?
An electric eel can generate a 463-V, 0.4-A shock for stunning its prey. What is the eel's power output?
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12/09/20

What is the heater's resistance?
A current of 25.5 A flows through an electric heater operating on 220 V. What is the heater's resistance?
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12/09/20

What is the current?
A lightning stroke lasts 0.03 s and involves a flow of 106 C. What is the current?
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12/09/20

speaker and microphone urgent help
. A speaker emits isotropic sound waves at a frequency of 3x103 Hz and a power of 25 Watts. A small microphone has an area of 0.72 cm2 and is located 4.12 meters from the point source. The speed of... more
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12/09/20

Which one is correct? I have two different answers to the question: Is the number of particles per mole dependent on the kind of atom/element? Why or why not?
No, because the number of particles per mole is measured by the Avogadro Number. This means that one mole of any substance is equal to 6.022 × 10²³. Although the number of particles per mole is not... more
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12/09/20

Name at least three targets molecules that get phosphorylated
Name at least three targets molecules that get phosphorylated by mitotic Cdk after its activation by the appropriate cyclin at the onset of mitosis (prophase)Then, describe the specific changes in... more
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12/09/20

What are the two major mechanisms through which cell signaling leads to a change in cell behavior?
What are the two major mechanisms through which cell signaling leads to a change in cell behavior?
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