Tuesday
February 9, 2016

Posts by Scott

Total # Posts: 706

Physics
you seem to have forgotten gravity add g to your acceleration number and you should be okay
September 25, 2012

physics
the acceleration is the change in velocity over time in this case __ (12.0 - 7) / 2.0
September 25, 2012

Math
Yoko's speed is 9/10 of Yolanda's in the time it takes Yolanda to run 110 yd, Yoko runs 99 yd so Yolanda wins the second race by a yard for a tie, the 100 yd that Yoko runs must be 9/10 of the distance that Yolanda runs .9 x = 100 __ x = 1000/9 Yoko runs 100 yd (900/9...
September 24, 2012

math 176
(x - 3y + 2z)(x - 3y - 2z)
September 24, 2012

MaTh
the area of the base is a factor of 42 with a perimeter of 18, the possible block arrangements are __ 8 X 1 __ area 8 7 X 2 __ area 14 6 X 3 __ area 18 5 X 4 __ area 20 14 is the only factor of 42, so the height must be 3
September 24, 2012

Pre-Ap Physics
the initial vertical velocity is __ (2650 m/s) * cos(41.9º) the time of flight is the initial vertical velocity divided by the gravitational acceleration __ 2 * [(2650 m/s) * sin(41.9º)] / (9.8 m/s^2) the horizontal velocity is __ (2.65 km/s) * cos(41.9º) the ...
September 24, 2012

Science chemistry
if n is the number of half-lives (1/2)^n * 1.000 = 0.121 (1/2)^n = 0.121/1.000 n [log(1/2)] = log(0.121) n = [log(0.121)] / [log(1/2)] half life = [1h17m] / n
September 24, 2012

chem
both compounds have one Cu, so the moles should be the same to find grams, multiply by the molar mass of CuO
September 24, 2012

chemistry
density is measured in g/cm^3 d = 19.07 / (3.1 * 1.9 * 4.6)
September 24, 2012

Physics(Please help, thank you)
the force that was needed to balance out F1 and F2 is equal in magnitude to the resultant, but opposite in direction so the resultant would be 280g at 77º since F1 and F2 have equal magnitudes and are 90º apart; the expected resultant would be 283g at 75º __ so ...
September 24, 2012

physics
momentum is conserved the mass of the clay, times its velocity; is equal to the mass of the clay+block, times its velocity 0.5 * v = (6 + 0.5) * 3
September 23, 2012

Physics
at 4s, the speed is 24 + 4g at 5s, the speed is 24 + 5g so the average speed over the interval (for one second) is 24 + 4.5g the distance is the speed times the time
September 23, 2012

Physics
h = .5 * g * t^2 34 = .5 * 9.8 * t^2
September 23, 2012

physics
constant velocity means no acceleration, which means zero net force so the third force is equal in magnitude to the resultant of the given forces; but opposite in direction the magnitude of the resultant of the given forces is __ sqrt(61.9^2 + 52.0^2) the tangent of the angle ...
September 23, 2012

physics
the work done on the car is reflected by the change in kinetic energy w = [.5 * 2000 * 20^2] - [.5 * 2000 * 10^2] the units are joules
September 21, 2012

Science
the kinetic energy at the bottom is the kinetic energy at the top plus the gravitational potential across the circle .5 m (Vb)^2 = [.5 m (Vt)^2] + [m g h] dividing by .5 m (Vb)^2 = (Vt)^2 + 2 g h v^2 = 3^2 + [2 * 9.8 * (2 * .8)]
September 21, 2012

precal help
n = d - 4 [(d - 4) / d] + [d / (d - 4)] = 5/2 multiplying by [2 * d * (d - 4)] [2 (d - 4)^2] + (2 d^2) = 5 d (d - 4) 2d^2 - 16d + 32 + 2d^2 = 5d^2 - 20d 0 = d^2 - 4d - 32 factoring __ 0 = (d - 8)(d + 4) 0 = d - 8 __ 8 = d
September 21, 2012

Physics
this is like a projectile problem turned sideways 0 = -(.5 * 3.7 * t^2) + (30 * t) solve the quadratic for t (you want the non-zero solution)
September 21, 2012

physics
the crate is sliding, so μk (the kinetic coefficient) is the relevant one the direction of the frictional force is OPPOSITE to the direction of motion the magnitude of the force is: the normal force of the crate on the ramp [m * g * cos(30º)]; multiplied by the ...
September 20, 2012

phsycis
the force diagram reflects the physical setup the walker is 15.0 m from either end; and is displacing the wire 1.0 m this means that the vertical component of the tension is one-fifteenth the tension in the wire (on BOTH sides) so the force exerted by the walker is 3675/15 * 2...
September 20, 2012

physics
because it starts from rest and accelerates uniformly, the average velocity is 1/2 the final velocity convert the km/h into m/s [multiply by 1000/3600] the distance is the average velocity, multiplied by the time (8.5 s)
September 20, 2012

Math
looks good
September 13, 2012

Physics
horizontal velocity (Vh) is the velocity (V) times the cosine of 20.0º vertical velocity (Vv) is V times the sine of 20.0º or __ Vv = Vh * tan(20.0º) = (104/4.60) * tan(20.0º) = 8.23 when the stone hits the ground, H = 0 0 = (-.5 * g * 4.60^2) + (8.23 * 4....
September 13, 2012

Physics
a) vertical __ H = (-.5 * g * 2.00^2) + 20.60 __ g is gravitational acceleration horizontal __ d = 19.0 * 2.00 b) H = 0 when the ball hits the ground 0 = (-.5 * g * t^2) + 20.60 solve for t to find the flight time
September 13, 2012

Physics
the k.e. is equal to the initial k.e. plus the potential energy from the drop k.e. = (.5 * .100 * 5.00^2) + (.100 * g * 10.0) g is gravitational acceleration
September 13, 2012

Math
a) 128 = (5 * 25) + (3 * 1) = (5 * 5^2) + (0 * 5^1) + (3 * 5^0) in base 5 __ 503 b)128 = 2^7 = (1 * 2^7) + (0 * 2^6) + (0 * 2^5) + (0 * 2^4) + (0 * 2^3) + (0 * 2^2) + (0 * 2^1) + (0 * 2^0) in base 2 __ 10000000 c) 128 = (10 * 12) + (8 * 1) = (10 * 12^1) + (8 * 12^0) in base 12...
September 13, 2012

Physics
the vertical component of the velocity (Vv)is __ 20.0 * sin(32.0º) the horizontal component (Vh) is __ 20.0 * cos(32.0º) the time (T) to max height is __ Vv / g a) Hmax = (-.5 g T^2) + (Vv * T) + 1.1 b) at Hmax, the ball has no vertical velocity; only horizontal (Vh)
September 13, 2012

PHYSICS
the time to accelerate to takeoff speed is __ 35 / 3.8 the average speed during acceleration is __ (0 + 35) / 2 the distance (length of runway) is speed times time
September 13, 2012

physics
0 = (-.5 * g * 5^2) + (10 * 5) + h g is gravitational acceleration
September 13, 2012

physics
Ha = -.5 g t^2 + 75 Hm = -.5 g t^2 + 30 t 75 = 30 t __ this is when substitute t into either equation to find where
September 13, 2012

Physics
a) [(2.25 m/s * 4.98 min) + (1.58 m/s * 2.18 min)] * 60 s/min b) (answer from a) / (4.98 min + 2.18 min) / (60 s/min)
September 13, 2012

physics
5.20 m/s * cos(51.5º)
September 12, 2012

PHYSICS
the final velocity of the ball must be zero at the edge of the table (after 1.32 m of travel) the average velocity is initial plus final,divided by two v = (2.1 cm/s + 0 cm/s) / 2 = 1.05 cm/s the time to stop the ball is the distance divided by the velocity t = 132 cm / 1.05 ...
September 12, 2012

Physics
after 1st stage: final velocity __ Vf1 = 26.4 * 3.92 final height __ Hf1 = .5 * 26.4 * 3.92^2 after 2nd stage: final velocity __ Vf2 = (12.3 * 4.48) + Vf1 final height __ Hf2 = (.5 * 12.3 * 4.48^2) + (Vf1 * 4.48) + Hf1 free-fall time is __ 21.2 s - 3.92 s - 4.48 s , or 12.8 H...
September 12, 2012

science
the angular momentum of the system is constant, so the velocity is inversely proportional the the radius of the orbit Va = Vp * (Rp / Ra)
September 12, 2012

physics
f = m a __ the force (weight) is directly proportional to the acceleration (g) weight = 685 * (9.8 / 12)
September 12, 2012

physics
f = m a __ acceleration is inversely proportional to the mass a = 2.9 m/s^2 * (2.7 / 14.9)
September 12, 2012

physics
time up equals time down (still) initial vertical velocity is __ 1650 * sin(66.1º) flight time is __ 2 * 1650 * sin(66.1º) / 9.8
September 12, 2012

Physics
ignoring the height of contact time up equals time down h = .5 g t^2 = .5 * 9.8 * 2.1^2
September 12, 2012

math
1,000,000 = 10^6 = 2^6 * 5^6
September 12, 2012

physics
average velocity equals initial plus final, divided by two Va = (12 + 24) / 2 = 18 m/s distance equals velocity times time d = 18 * 6.5
September 12, 2012

Math
yes
September 12, 2012

science
y / x = tan(-47.5º) y = x * tan(-47.5º)
September 12, 2012

math
(0 * 2^0) + (1 * 2^1) + (0 * 2^2) + (1 * 2^3) + (0 * 2^4) + (1 * 2^5) 0 + 2 + 0 + 8 + 0 + 32 = 42 (2 * 12^0) + (1 * 12^1) + (9 * 12^2) 2 + 12 + 1296 = 1310
September 12, 2012

10th Grade Math-Algebra 2
5 * x^3 * 4 * x * y^2 20 x^4 y^2
September 12, 2012

physics
stone time (T) plus splash time (t) equals watch time minus reaction time T + t = 3.65 - .25 __ t = 3.4 - T d = .5 * g * T^2 __ g = 9.8 m/s^2 also, d = 340 * t __ d = 340(3.4 - T) 4.9 T^2 = 1156 - 340 T 4.9 T^2 + 340 T - 1156 = 0 use quadratic formula to find T, then plug in ...
September 12, 2012

Physics
average velocity is __ 40.0 m / 9.40 s average equals initial plus final, divided by two 40.0 / 9.40 = (i + 2.35) / 2 __ i = 6.16 acceleration equals final minus initial, divided by time a = (2.35 - 6.160 / 9.40
September 12, 2012

Physics
average velocity is __ 40.0 m / 9.40 s or __ 4.26
September 12, 2012

Physics
the height of a freely falling object is: H = .5g*t^2 + Vo*t + Ho Vo is the initial vertical velocity Ho is the initial height (height of building) the height is 0 when the brick hits the ground in 3.3 sec g is -9.8 m/s^2 H = .5gt^2 + [17 * sin(25º)]t + Ho 0 = -4.9(3.3^2...
September 12, 2012

College Physics
the potential energy at the top of the leap is equal to the (vertical) kinetic energy at the start m * g * h = .5 * m * [v * sin(45º)]^2 the m's cancel (2 * g * h) / [sin(45º)]^2 = v^2 g = 9.8 m/s^2 145 = v^2
September 12, 2012

physics
H = .5 g t^2 1.7x10^4 = .5 * 3.3 * t^2 1.03x10^4 = t^2 2) multiply the fall time (t) by the acceleration (3.3 m/s^2) to find the final velocity
September 12, 2012

writing equations
We did not find results for: Please help me do this problem: I need to write an expression for the cost of an ice cream cone and "t' number of toppings. The information is once scoop of ice cream for $3 and each topping is $1.
September 11, 2012

Math
A cone has a volume of 41 cubic meters. If cut the cone in half, what would be the volume of the cone?
May 17, 2012

algebra 2
factor 4a cubed+44a squared+120a
May 2, 2012

english
give me the passage its from or like write the paragraph its used in
May 1, 2012

english
what is the question?
May 1, 2012

algebra 2
find the product (2a+1) cubed
April 27, 2012

english
whats the question
April 26, 2012

english
i think the whole sentence is infinitive
April 26, 2012

english
:) By mistake I opened a package addressed to my sister. is the next one and would be infinitive phrase?
April 26, 2012

english
looking for unusual flowers
April 26, 2012

english
thank you and i have a few more to do the next one is:We walked along the mountain path looking for unusual flowers. so it would be nominative absolute?
April 26, 2012

english
yes, and i think if its the whole sentence then its just asking what is the structure of it
April 26, 2012

english
i think its about the whole thing or like the part that is,then what is the structure of it
April 26, 2012

english
What grammatical structure is the italicized portion of the sentence? My most valuable coin, one from Spain, is worth more than $100.00.
April 26, 2012

algebra 2
If a sum of money is deposited in a savings account that is paying x percent annual interest the this sum of money increases by a factor of(1+x) squared after 2 years. multiply this expression. evaluate the polnomial expression found in part A for an annual interest rate of 50...
April 25, 2012

algebra 2
Multiply (3a+1)cubed
April 25, 2012

Math
Is this the answer?? I know that the triangle formed is both right and isosceles because There will be a 90 degree angle and two 45 degree angles.
April 22, 2012

Math
How do I measure
April 22, 2012

Math
It's a right isosceles triangle
April 22, 2012

Math
Explain how you know that the triangle formed is BOTH right & isoceles?
April 22, 2012

math
Use a net to find the length and width of a single sheet of paper that could be used to wrap the entire gift box. l = 6 in w = 4 in h = 2 in
April 16, 2012

calculus
P2 has a mysterious inner product * for which {x+4, 3x-5} is an orthonormal basis. IS there enough information to tell what is the length of 1? If so, compute it. If not say why not.
April 13, 2012

Math
1. P5 is an innerproduct space with an inner product. We applied the Gram Schmidt process tot he basis {1,x,x^2,x^3,x^4} and obtained the following as the result {f1,f2,f3,f4,x^4+2}. a. What is the orthogonal complement of P3 in P5 with erspect to this inner product? b. What ...
April 13, 2012

calculus
P2 has a mysterious inner product * for which {x+4, 3x-5} is an orthonormal basis. IS there enough information to tell what is the length of 1? If so, compute it. If not say why not.
April 13, 2012

math
18 times 4 times 14
April 11, 2012

algebra
find volume of the figure. Type in exponential expression. 2 2x 4 3 4x 4x shape is a retangle
April 4, 2012

algebra
an investor invested a total of 1,600 in 2 mutual funds.One fund earned a 6% profit while the other earned a 2% profit. If the investors profit was $56, how much was invested in each mutual fund. amount invested in mutual fund that earned 6% was___ amount invested in fund that...
March 30, 2012

algebra
is the answer one solution
March 30, 2012

algebra
use elimination method to solve. A+6b=14 A+2b=2 does it have (a)one solution (b)Infin. many sol (c)no solution
March 30, 2012

algebra
not sure what you are saying
March 30, 2012

algebra
use method of substitution to solve the system of linear equations. 2x-y=3 9x-4y=14 is the solution an ordered pair(,)
March 30, 2012

algebra
tugboat goes 160 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current. speed of tugboat is speed of the current is
March 30, 2012

algebra
method of substitution the perimeter of some traffic sigh must be 126 inches. Also its length is 11 inches longer than its width. Find the dimensions
March 29, 2012

algebra
use method of substitution to solve the system of linear equation 3x+4y=3/2 y=2x-1
March 29, 2012

healthcare accounting
what is the entry when we get a gift of $100,000 for cancer research only with the investments earnings also limited to cancer research?
March 20, 2012

Thermo
Calculate the standard cahnge in enthalpy for the combusation of coal/ Show the balnaced reaction. How does one get the balanced reaction of coal? Coal has many substances that make up its compsistion
March 18, 2012

physics
you kind of just droped 1/di there. where did it go? I just dont get how you got to: 1/di - 1/2di and then you went from 1/di - 1/2di = 1/2di.....you just droped 1/di. That doesnt make any since.
March 17, 2012

math
area of triangle with base of 1 3/4 and height of 4/5
March 9, 2012

math
20 jars per case
March 5, 2012

Math
I Have to answer the game, "what's my rule" I've tried everything. I do not know if the teacher made a mistake in the problem. When x=1, y=3 x=2, y=6 x=3,y=12 x=4, y=24 I see that Y is doubling, but I need a rule to use with variable Thanks!
March 5, 2012

geometry
is it a rectangle? 8 meters
March 5, 2012

Algebra
30 pigs and 40 chickens
March 5, 2012

math
h=(q-10)*.5
March 5, 2012

trig
Name three values of theta that would result in y equal to cot times theta being undefined.
February 27, 2012

Math
In a triangle the two larger angles differ by 10 degree. The smaller angle is 50 degree less than the largest angle. Find the measure of each angle. Just searching help on how to set it up.
February 22, 2012

physics
What reaction would you get from francium and water in outer space and what if you added hydrogen to the experiment as far as being used for fuel for travel
January 17, 2012

Probability
Well if you divide 12 children into 5 groups you might find yourself in jail....I'm just saying
January 17, 2012

Math
What's a shame is that this question is a graded problem from a college, and that the problem is not a difficult one to solve, and yet there is someone who (rather than working it out!!) has gone looking for someone else to work it out!
December 25, 2011

College Math
True or false conclude the functions of F(x) + 2xsquared - 2x +7
December 12, 2011

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