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Tammy green
How much boiling water would it take to dissolve 50 g. In sucrose? If you cooled that wayer to 25 deg. C. How much sucrose would remain?
How would i solve this? Can i see steps please i really do want to learn
2 AnswersChemistry6 years ago
i dont know how to solve this problem can somebody please explain , i would actually like to learn. the image is below?
If the price falls from P2 to P1, consumer surplus increases by what area?
1 AnswerHomework Help6 years agoive tried a lot of methods but im wrong. even my tutor couldnt help me?
Identical point charges of +6.1 μC are fixed to diagonally opposite corners of a square. A third charge is then fixed at the center of the square, such that it causes the potentials at the empty corners to change signs without changing magnitudes. Find the sign and magnitude of the third charge.
1 AnswerPhysics6 years agono idea where to start, but i want to learn so steps would really help. thank you?
So identical point charges (q = +7.40 10-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.465 m. A test charge (q0 =-2.30 10-8 C), with a mass of 6.65 10-8 kg, is released from rest at one of the empty corners of the square. Determine the speed of the test charge when it reaches the center of the square
1 AnswerPhysics6 years agoive tried a lot of methods but im wrong. even my tutor couldnt help me?
Identical point charges of +6.1 μC are fixed to diagonally opposite corners of a square. A third charge is then fixed at the center of the square, such that it causes the potentials at the empty corners to change signs without changing magnitudes. Find the sign and magnitude of the third charge.
1 AnswerPhysics6 years ago
I said true, but don't feel confident about it. someone help me out ease. the image of the graph is below?
Given the equilibrium after a change in supply from S1 to S2 at the old price of $2.50, there will be pressure for the price to rise. True or False?
1 AnswerEconomics6 years agoI only need help in part b.I use (mgx)(.5kx^2)=.5mv^2 and my answter is wrong help me figure out where im wrong please.?
A 1.0-kg object is suspended from a vertical spring whose spring constant is 112 N/m.
(a) Find the amount by which the spring is stretched from its unstrained length.
.0875 m
(b) The object is pulled straight down by an additional distance of 0.18 m and released from rest. Find the speed with which the object passes through its original position on the way up.
1 AnswerPhysics6 years agoCan I see actual steps for this, not just an answer. I would actually like to learn. thank you!?
A spring is compressed by 0.0664 m and is used to launch an object horizontally with a speed of 1.64 m/s. If the object were attached to the spring, at what angular frequency (in rad/s) would it oscillate?
1 AnswerPhysics6 years ago
i am convinced i am doing this right, but the computer marks it wrong. my work is at the end of the question.?
Concrete sidewalks are always laid in sections, with gaps between each section. For example, the drawing shows three identical 2.4-m sections, the outer two of which are against immovable walls. The two identical gaps between the sections are provided so that thermal expansion will not create the thermal stress that could lead to cracks. What is the minimum gap width necessary to account for an increase in temperature of 38° C?
Change in L=(12e-6)(2.4m)(38°c)
=.0010944 m
(3/2)(.0010944m)=.0016416m
2 AnswersPhysics6 years agoI know i have to use m=q/c(change in temp.) and change in L=L initial*alpha*change in temp. but how do i find temp?
When 3850 J of heat are added to a 0.13-m-long silver bar, its length increases by 4.03 10-3 m. What is the mass of the bar
1 AnswerPhysics6 years agoI divided 2.42e6 j/kg by 55.49 moles if H2O and got 43608.4 and it was wrong where did i mess up?
When perspiration on the human body absorbs heat, some of the perspiration turns into water vapor. The latent heat of vaporization at body temperature (37° C) is 2.42 x10^6 J/kg. The heat absorbed is approximately equal to the average energy E given to a single water molecule (H2O) times the number of water molecules that are vaporized. What is E?
1 AnswerPhysics6 years agoi dont even know where to begin on this one. Can somebody show me steps to help me out please?
The ends of a thin bar are maintained at different temperatures. The temperature of the cooler end is 12° C, while the temperature at a point 0.14 m from the cooler end is 23° C and the temperature of the warmer end is 45° C. Assuming that heat flows only along the length of the bar (the sides are insulated), find the length of the bar.
1 AnswerPhysics6 years ago
my work is at the end of the ques. but i get the answer wrong?
Concrete sidewalks are always laid in sections, with gaps between each section. For example, the drawing shows three identical 2.4-m sections, the outer two of which are against immovable walls. The two identical gaps between the sections are provided so that thermal expansion will not create the thermal stress that could lead to cracks. What is the minimum gap width necessary to account for an increase in temperature of 38° C? (See Table 12.1 for appropriate constants
K=7.4e-13
L=7.4e-13x2.4x38°=.0010944
.0010944x(3/2)=.0016416m
3 AnswersPhysics6 years agoI get 1.44 as my answer but that is wrong. how do i solve this one?
How many days does it take for a perfect blackbody cube (0.012 m on a side, at 90.0° C) to radiate the same amount of energy that a 100 W lightbulb uses in one hour?
2 AnswersPhysics6 years agoonce i convert hp to watts i mult. by the .009 and divide that value by the watts buts i get it wring. how should i solve this?
Helium (He), a monatomic gas, fills a 0.009 m3 container. The pressure of the gas is 6.30 105 Pa. How long would a 0.25 hp engine have to run (1 hp = 746 W) to produce an amount of energy equal to the internal energy of this gas?
2 AnswersPhysics6 years agoi feel that i am making this harder than it is. Help me find my problem, i actually want to learn?
When 3850 J of heat are added to a 0.13-m-long silver bar, its length increases by 4.03 10-3 m. What is the mass of the bar?
1 AnswerPhysics6 years agoI cannot figure out what i am doing wrong! ive tried it many times and end up with the same answer,can i get an explanation?
How many days does it take for a perfect blackbody cube (0.012 m on a side, at 90.0° C) to radiate the same amount of energy that a 100 W lightbulb uses in one hour?
1 AnswerPhysics6 years agohelp please! how would i go about solving this problem?
When perspiration on the human body absorbs heat, some of the perspiration turns into water vapor. The latent heat of vaporization at body temperature (37° C) is 2.42 106 J/kg. The heat absorbed is approximately equal to the average energy
E
given to a single water molecule (H2O) times the number of water molecules that are vaporized. What is
E?
2 AnswersPhysics6 years ago
