# Posts by Jacob

Total # Posts: 896

Physics
Two forces parallel to the x axis do 17.2 J of work on a small tray while moving it 19.0 m in the x direction across a gym floor. One of the forces has a value of +3.93 N in the x direction. What is the other force?

Chemistry
if all the macro-molecules are made mainly of the elements CHO, how are they different?

Algebra
The length of a rectangle is 11 cm more than the width. The perimeter is 90 cm. Find the length and width of the rectangle.

math
2×2=4

statistics
59.9

Physics
12

Mathematics
The minute-hand of a clock is 6cm long. How far does the end of the hand travel in 35m?

physical science
A 0.200 kg ball sits on a shelf 2.00 meters from the floor and then falls to a point 1.00 meter from the floor ignoring any affects due to fiction at this position_______

Math
You should reduce 26/56 to 13/28 yeah lol I agree

6. If 4.0 × 1018 J of work done on a point charge changes its electric potential difference by 25.0 V, then what is the magnitude of the charge? (Points : 1) 1.6 × 101^9 C 4.0 × 101^9 C 1.6 × 101^8 C 4.0 × 101^8 C 7. Two parallel plates have an ...

Research studies indicate that the referral approach is effective because: A. customers seldom trust a salesperson, but do trust a third party. B. customers may be far more impressed with your good points if they are represented by a third party, rather than by you. C. ...

General Chemistry
It actually is 6 electrons when you plug it in Bob. You need 3 for each Au that is fully oxidized.

Probability
a) y/(1+mu) b) 1+mu c) (y+1)/(1+mu)

probability
2) Part a

Algebra
What is a quartic function with only the two real zeros given? x = -4 and x = -1 A. y = x^4 + 5x^3 + 5x^2 + 5x + 4 B. y = x^4 - 5x^3 - 5x^2 - 5x - 4 C. y = -x^4 + 5x^3 + 5x^2 + 5x + 4 D. y = x^4 + 5x^3 + 5x^2 + 5x - 5

Math
Im think E

Math
Each of the following is equivalent to 75% of 60 EXCEPT A. 0.75 × 60 B. 0.6 × 75 C. 60 × 15 20 D. 75 × 6 100 E. 60 × 3 4

Math
The velocity (feet per second) of an object is given by the equation v = 3(2t + 1)0.4. What is the equation for the acceleration of the object? What is the equation for the displacement of the object? The displacement is initially 25 feet. What are the values of the ...

Global studies
yeah smile more is right I just got 100%

Chemistry
What are the typical ppm values of hard water and an unknown water sample and how do their titrations compare?

math
The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?

math
the temperature has been dropping 3 degrees per hour. at midnight the temperature was 25 degrees. let y be the temperature after x hours

Math
Stacy Multiplied 5 * 9 and said the answer was 44. What 2 patterns could you use to show that her answer is not correct?

Physics
A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. If the ball leaves her club with a velocity of 46.0 m/s at an angle 0f 35.0º above the ground, find the time that the ball is in the air before it hits ...

English
Could someone explain whats the difference between these two questions? Why do you wish to study the program(s)? What influenced your decisions to apply to the program(s)?

Physics
) The energy of the first excited state of a hydrogen atom is -0.34 eV ± 0.0003 eV. What is the average lifetime of for this state?

math --- pls check my work!
these are righ!!!!!!!!!

History
1. D 2. C. 3. B 3/3 100

Health
Alright thank you

Health
Thank you so much, do you know how many milligrams would be good?

Health

geometry
Quad ABCD with diagonal DB. <adc=90, <c=91, <cbd=43. segment ad=segment dc=9. Which segment is longer ab or ad and why? steve, how are you solving for <abd, what are you assuming about <abc?

math
Thank you steve, but something must be wrong with this problem. We have not learned law of cosines or law of sines yet and the correct answer is ad?? Baffled at how to get this based on what we are studying, SAS and SSS inequality theorems.

math
How are you solving for <abd. Making assumptions?

math

Science
HOW DOES CROP ROTATION HELP PRESERVE SOIL

Science
Which aspect of Einstein's theory of special relativity was testable? the postulates only the postulates and the predictions the predictions only none of the aspects

Physics 221
What is the magnitude and direction of the electric field at a point 0.75 m away from a point charge of +2.0 pC?

MAA Global Science
A lump of ice falls from a jet plane as it tries to land at an airport. If the ice hits the ground with a vertical speed of 85m/s, what was the height of the plane when the ice fell off.

Trig
Sum and diffence formula Finding Exact value of Tan 105-Tan 10)-15)/1+ tan(105)Tan(-15)

Geometry
Find the missing numbers for the dimensions and measures of a rectangular prism... Length ? Width 7 m Height 5 m Surface Area 214 m to the second power Volume ? Please answer the one's with a ?. Thank you.

Geometry
Let's say a company is manufacturing juice boxes that are rectangular prisms with dimensions 4 inches by 3 inches by 4 inches. The company has a warehouse whose dimensions are 40 feet by 30 feet by 20 feet. If the company makes 200,000 juice boxes, will it be able to store...

math
How do you work this word problem? The team played 125 games and lost 15 more than they won.How many did they lose

A plane flies due north (90° from east) with a velocity of 100 km/h for 3 hours. During this time, a steady wind blows southeast at 30 km/h at an angle of 315° from due east. After 3 hours, where will the plane’s position be relative to its starting point? Show ...

science

math
How many formula units of the compound are present in 5.7g of Epson salt?

Health part 2
its not c

Math
So, one of my subjects midterm I got 71% (43 out of 60). The mid-term test was worth 25%. It is my first evaluation. How do I calculate my final mark so far? :|

Physics
A juggler throws a ball straight up into the air and it takes 2.80 seconds to reach its peak. How many seconds will it take after that to fall back into his hand? Assume he throws and catches the ball at the same height.

Math
Ginny has two quarters. For every week that Ginny does all of her chores, her mother increases the amount of money Ginny has exponentially. The equation y=0.5*3^x represents the amount of money that Ginny has after x weeks of doing all of her chores. What does the term 3^x ...

Algebra
Debbie finished her algebra test early so she decided to check each of her answers. After checking her answer to question #10, she realized she made a mistake in her solution. In which step does Debbie make her mistake? Original Equation: 2 + 3y = 5(y - 2) Step One: 2 + 3y = ...

History (chronological order of date)
11,000 b.c. 540 b.c. 0 894 a.d.

math
A certain ball is dropped from an altitude of 1 meter and rebounds one-half of it's previous altitude. What is the total distance the ball has traveled when it hits the floor the 40th time?

Geometry
(5d + 5) - (d +1)

Physics
A swimmer heads directly across a river, swimming at 1.9 m/s relative to the water. She arrives at a point 50 m downstream from the point directly across the river, which is 79 m wide. (a) What is the speed of the river current? m/s (b) What is the swimmer's speed relative...

What is smart estimation to determine an estimation range.

physics
A student runs through a field 100m(E) then 200m(S) and finally 50(45 degrees S of E find his final position relative to his starting point? please explain steps Answer is 272(60 degrees S of E)

Physics
Jim is 100m(S) of Paul. Paul begins to walk east at 2.0m/s the same time Jim begins to walk west at 3.0m/s. what is the displacement of Jim from Paul 20 seconds later? Please explain steps Answer is 141(SW)

physics
A jet starting from rest reaches a speed of 241km/h on 96.0m of runway. Determine the magnitude of the Jet's acceleration? Answer is 23.3m/s^2

Physics
I have no clue to this question which is why i needed the help :(

Physics
What value of voltage will be reached across the plates of a capacitor, after two time constants, if the maximum value of voltage when fully charged, reaches 200 volts?

Math help!
A bag contains 9 blue marbles and 1 green marble. What is the probability of drawing a blue marble followed by a green marble, without replacing the first marble before drawing the second marble? Is the answer 1/9?

Math
I forgot to mention the die has 6 sides.

Physics
Find the scalar product of the vectors ai+bj and bi-aj . Where a and b are arbitrary constants. What's the angle between the two vectors?

Physics
1/2mv^2(final)-1/2mv^2(initial) 2600J

Physics
1/2mv^2=1/2mv^2 v(subcompact)= 116.0762 km/h

Physics

Physics
.75 Joules

I don't care

math
2 51 45 58 41 44 37 38 40 44 45 40 59 45 44 34 44 43 48 32 38 1.Determine the mean of the data 2.Determine the standard deviation of the data

IIT-JEE
i have to prepare for my IIT-JEE examination. But i have no knowledge about the books for preparation. Please tell me some books for the preparation of objectives for IIT-JEE. Now i am in 10+2 class.

physics
v(b)=2m/s V(w)=1m/s Velocity of boat w.r.t water= V(bw)=v(b)-v(w) =(2-1)m/s =1m/s Time= 3min =180s Distance= v(bw)*time = 1m/s*180s = 180m.

Physics
its (c)-inertia

english
where did the story October sky take place

math
Using the method of completin the square solve x2-27x+50

English
what does he makes his life seems like "poor me" and he is elevated the process of suffering to a level that any martyr would admire means??

Applied Calculus
The world population at the beginning of 1990 was 5.3 billion. Assume that the population continues to grow at the rate of approximately 2%/year and find the function Q(t) that expresses the world population (in billions) as a function of time t (in years), with t = 0 ...

Applied Calculus
Thanks to both of you, I won't forget how to do this next time! It makes much more sense now, and will be even easier on basic functions versus logarithmic/exponential functions. I think it was the natural log that tripped me a little bit there, but thank you for the ...

Applied Calculus
I am sorry, the function is g(x)= x/(ln(x))

Applied Calculus
Find the absolute extrema of the function on the interval [2,3]. (Round your answers to the nearest hundredth.) Absolute Minimum ___ at x=___ Absolute Maximum ___ at x=___

Algebra(1st one was typo)
The function f(x)=x^3 +1/4 x −1^4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f^−1 (x) ?

Algebra
The function f(x)=x 3 +1 4 x−1 4 is a monotonically increasing function, hence it is injective (one-to-one), so its inverse function exists and is well defined. How many points of intersection are there, between the function f(x) and its inverse f −1 (x) ?

Geometry
Let ƒÆ=sin −1 7 25 . Consider the sequence of values defined by a n =sin(nƒÆ) . They satisfy the recurrence relation a n+2 =k 1 a n+1 +k 0 a n ,n¸N for some (fixed) real numbers k 1 ,k 0 . The sum k 1 +k 0 can be written as p q , where p...

Geometry
ABC is a triangle with circumcenter O , obtuse angle BAC and AB<AC . M and N are the midpoints of BC and AO respectively. Let D be the intersection of MN with AC . If AD=1 2 (AB+AC) , what is the measure (in degrees) of ÚBAC ?

Trig
Use trigonometric identities to solve tan(2θ)+tan(θ)=0 exactly for 0≤θ≤π. If there is more than one answer, enter your answers as a comma separated list

math
Yes thanks

math
Yes I don't know that pattern either

math

Geometry
ABCD is a parallelogram. If ÚABC=35 degrees , what is the measure (in degrees) of ÚADC ?

Geometry
Sorry made a mistake you are right

Geometry
Actually not because the problem is asking for 3 digits such as 100

Geometry
How many three digit numbers have three distinct digits?

Is it right?

Applied Calculus
For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius and height of a container if it has a capacity of 29 in.3 and is constructed using the least amount of metal. (Round your answers to two decimal ...

Calculus
Let N = \int \int \int_B xyz^2\ dV , where B is the cuboid bounded by the regions 0 \leq x \leq 1, -1 \leq y \leq 2 and 0 \leq z \leq 3. If N = \frac{a}{b}, where a and b are coprime positive integers. What is the value of a+b?

Applied Calc
That's interesting you say that, listed under my professor's list of things we need to study, he has that listed. Do you believe it to be a mistake? Should I email him perhaps? I see what you are saying here. Thank you Bob.

Applied Calc
What is the marginal average cost function?

Ms. Sue
Sun of a gun

Applied Calculus
I know how to solve it to get .21, but I need to write it using positive exponents only. I know this isn't technically Calculus, but it is what we are reviewing currently. I am a bit rusty with this one, can't quite remember how to do it. I am trying some different ...

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