4,347 Answered Questions for the topic Science

04/26/23

Algebra one, speed
The bicyclists were 300 miles apart at 3 p.m. and were headed toward each other. If they met at 9 p.m. and one was traveling 20 miles faster than the other, what was the speed of each bicyclist.
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04/25/23

static equilibrium
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 300 N and is 4.50 m long. What is the tension in each rope when the 600-N worker stands 1.30... more
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04/24/23

Finding numbers, word equation

Find three consecutive odd integers such that four times the sum of the first and second is 11 more than 3 times the third.
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04/21/23

algebra one, word equation
The number of girls in Mr. Taylors algebra class exceeded the number of boys by 5. If there were 39 pupils in the class, how many were girls.
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04/21/23

Algebra one, word equation
Jane and Sophia went to the corner store where packages of gum cost 85 cents each and candy bars cost 60 cents each. They spent $15 and bought 4 more packages of gum than candy bars. How many... more
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04/21/23

Algebra 1, round trip
Jed rode his scooter at 20 miles per hour and then jogged back at 8 miles per hour. If the round trip took him 7 hours, how far was it to school?
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04/19/23

Algebra 1, finding average

the sum of four numbers is 411.6. two of the numbers are 20.4 and 270.5. find the average of the four numbers.
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04/19/23

Algebra 1, probability

an urn contains 9 gray marbles and 10 purple marbles. ryan chooses one marble randomly and then another marble randomly. what is the probability that he picks two purple marbles, if he replaces the... more
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04/15/23

Explain in detail how the endocrine system is reacting during these given situations to bring the body back to homeostasis or may be causing adverse physiological effects.
2) Anthony lives in Western Washington and has been experience muscle weakness, fatigue, weight loss, depression, and decreased appetite. Anthony recently moved here from California one year ago.... more
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04/15/23

Explain in detail how the endocrine system is reacting during these given situations to bring the body back to homeostasis or may be causing adverse physiological effects.
2) Anthony lives in Western Washington and has been experience muscle weakness, fatigue, weight loss, depression, and decreased appetite. Anthony recently moved here from California one year ago.... more
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Science Physics

04/10/23

A uniform disk with a radius of 0.8 m and mass of 58.3 kg rotates at 5.4 rad/s. What is the rotational kinetic energy of the disk?
Please send an answer and explanation ASAP I'm overcomplicating this question.
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04/09/23

Name two advantages that induced pluripotent stem cells seem to have relative to embryonic stem cell.
Name two advantages that induced pluripotent stem cells seem to have relative to embryonic stem cell.
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04/09/23

Why did Dolly the sheep end up looking like the sheep that "donated" the udder cell rather than the sheep that donated the egg?
Why did Dolly the sheep end up looking like the sheep that "donated" the udder cell rather than the sheep that donated the egg?
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04/07/23

Chemistry: half reaction problem
How much of H2SO4 will be produced after oxydizing 2 kg of pyrite FeS2, which has mass part of iron sulfide of 95.2%.Subsequently, how many litres of 5 mol/l KOH do we need to neutralize the... more
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04/07/23

Chemical reaction problem
A piece of CaCO3 is put into a 1 litre (l) of 1.1 mol/l HCl solution. After whole CaCO3 dissolved, 10 ml of the resulting solution was being titrated with 1.08 mol/l NaOH solution. 1.69 ml of NaOH... more
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Science Math Chemistry

03/29/23

Given the following enthalpies of formation, calculate the standard enthalpy change for the incomplete combustion of ethance (C2H6)
Reactants/Products ▲H fC2H6 -84.68 kJ/molO2 ... more
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Science Reading Mcat

03/23/23

How do I improve my CARS score?
This is one of the most frequently asked questions for the MCAT. Whether you have a month left to study or you're just getting started it really important to have these three things in... more
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03/20/23

Question about Li2CO3
How do you get Li2CO3 from an ore containing LiCl. What are the exact ways to extract Li2CO3 in this way? And secondly, after you extract Li2CO3, how do you prove/make sure it is Li2CO3 (any... more
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03/19/23

Ideal gas law question
The pistons of two identical cylinders are rigidly connected to each other. The cylinders contain the same amount of the same heated gas. Suppose that one cylinder is heated and the other is... more
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Science Chemistry

03/18/23

need help with chem pH question please
A)Determine the pH and percent dissociation of a 0.183M propionic (CH3CH2COOH) acid solution. Begin by writing the balanced chemical equation. B) A portion of the above propionic acid solution was... more
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Science Chemistry

03/18/23

need help with calculating the pH of the following...
Determine the pH for the following solutions. Show your work to support your answer:a. 0.227M HCl     b. 0.186M NH3      c. 0.088M KHCO3
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03/17/23

Interesting physics problem about ice ball in Sun's orbit
An ice ball flew into the Sun's orbit and began to melt. Find the time it takes for this ball to melt if the distance from it to the Sun is d and the initial radius of the ball is R0. Ice density... more
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03/17/23

What thickness of ice will form on the surface of the lake
What thickness of ice will form on the surface of the lake in time t if the temperature of the enviroment is TA is constant and the surface temperature of the lake is equal to the temperature of... more
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03/17/23

Physics problem about a sphere in space
In open space, a sphere of radius R is filled with a liquid whose initialtemperature T0 (higher than its enviroment). Find the dependence of temperature of the liquid with time. The mass of the... more
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03/16/23

Thermodynamics: Thermal conductivity in a pipe
You have a pipe A (inner and outer radii are r0 and r1) made from material, whose thermal conductivity coefficient K1. What thickness should different pipe B have, which has the same flow rate and... more
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