# Posts by Donny

Total # Posts: 54

**Chemistry**

How much heat (in kilojoules) is released on reaction of 5.30 g of Al?

**physics**

A student tools along in his new Vette weaving in and out of slow traffic, overtaking little kids boarding the school bus, passing school zones without a second glance, cutting off ambulances and fire trucks, running yellow lights, red lights, yield signs, and stop signs ...

**physics**

An object travels 50 meters at 90° in 6 seconds and then travels 50 meters at 245° in 13 seconds. (a) What is the magnitude of the objects resultant displacement? (b) What is the direction of the objects resutlant displacement? (c) What is the magnitude of the objects ...

**math**

Two mechanical shafts are joined together at their ends. Together, their total length is 17 2/9 ft. If one shaft is 7 5/9 ft long. How long must the other shaft be?

**math**

a car traveled 91 miles in 3 1/4 hours. What is the cars average speed in miles per hour?

**arithmetic**

round .44857 to the nearest hundreths?

**physics**

The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground some distance away. The world ...

**Physics**

my 1 f) are as follows: -1.17e-7 4.72 -1.01e9 2.81e-7 1.567 -3.62e8 the answers you provided for Q6 a regarding wavelength are wrong in my case though. i have a value of k=1e2 and omega= 3e10 also Q3 completely wrong (formulas provided will be appreciated) and lastly Q8 a) , ...

**Physics**

FLu, these are the following: Q3 (all) Q5 b) Q6 Q7 Q8 i know its a lot :S

**Physics**

flu i am stuck on the rest of them :/ you have some answers?

**Physics**

and omega is 1.03e11

**Physics**

oh btw k is 501.27

**Physics**

you're welcome. i need help with the remaining questions if you don't mind

**Physics**

i think you meant b... did the rest of the answers work? the formula is c/v ; c=speed of light, v= speed of what you calculated in which it would be (1.03e11)/(5*100)

**Physics**

a)0.0126 b)1.63e10 c)1.46 , (E_0*n)/c d)... help

**Physics**

please do help on this one

**Physics**

i need help on the RL and RLC circuits :/

**Physics**

can u help me on the RL circuit question 1 and 2?

**Physics**

anyone can help me on the RL circuits?

**Physics**

need help on 2 RL circuits D:

**Physics**

magnetic loop is the only one i can't solve

**Physics**

the brackets... BRACKETS ((1.25663706*10^-6*(1*0.08*0.001))/2*pi*0.08)*ln(1+(0.08/0.22)) = 3.91822*10^-12 ((1.25663706e-6)*(1*0.08*0.001))/(2*pi*0.08)*ln(1+(0.08/0.22))= 6.2030986e-11

**Physics**

((1.256637061e-6)*(1*0.08*0.001))/(2*pi*0.08)*(ln(1+(0.08/0.22))

**Physics**

sorry its supposed to be 6.++e-11 if you have your fx-570MS calculator you should be able to find mu_0 there. don't bother expanding the values

**Physics**

I have only the Bx and By, I assume you have them? it is both 0 with mine. I could not figure Bz out yet but will let you know when I do.

**Physics**

Flu our values may vary so i am not certain. but the formulas are fine if you could assist me on Q5 Flu ?

**Physics**

now someone please help me with this question A current I=2.9 A flows around a continuous path that consists of portions of two concentric circles of radii a and a/2, respectively, where a=4 cm, and two straight radial segments. The point P is at the common center of the two ...

**Physics**

it has to be in meters I=J*w*s (w and s are in meters so change them) then B= (mu_0*(J*w*s))/(2*pi*w)*(ln(1+w/x)) all are in meters. should get something like a 6.++e-7

**Physics**

X10 do you know how to solve for the magnetic field of a loop? i've been cracking my head

**Marketing**

You are interested in opening a SNOW BIZ snow cone shack. The SNOW BIZ company who wants to franchise this business to you has provided the following general information: Cost to make each snow cone: $0.25 ice, $0.05 plastic cone holder, $0.03 plastic straw, $0.10 flavoring ...

**Marketing**

Many companies introduce products that compete not only with their competitors’ brands but with their own internal brands. A. Under what conditions would you introduce a new product that you are sure will cannibalize one of your existing products? B. Why would you ...

**Marketing**

A. Explain the concept of NET MARKETING CONTRIBTION. B. What fundamental marketing strategies can a business pursue to grow marketing profits? C. Use examples to illustrate these various strategies.

**vector calculus**

Show that the given line integral is independent of path.Then, evaluate the line integral I by finding a potential function f and applying the Fundamental Theorem of Line Integrals. I=ç_{(0,0)}^{(1,2)}(x+y)dx+(x-y)dy

**calculus**

2 forces F1 = 2i-3j and F2 = 3i + 12j are applied at a point. What force F must be applied at the point to counteract the resultant of these 2 forces?

**MATH GURU, PLEASE HELP**

Not sure what no difference means. I was thinking that it was D for the answer but reading your response makes me think it may be E? If you can explain more that would be helpful. Thanks

**MATH GURU, PLEASE HELP**

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B. Pinternet–Pstore <.10 ...

**Statistics/Math- Please Help**

How can you determine if you are using a two tailed test vs a one tailed test? For example, for the below, which test would I use? Based on this data, at α =.01, can we conclude that the proportion of democrats who favor “junk food" tax is more than 5% higher ...

**Physics**

A spaceship is launched from the Earth's surface with a speed v. The radius of the Earth is R. What will its speed be when it is very far from the Earth? (Use any variable or symbol stated above along with the following as necessary: G for the gravitational constant, m for...

**Hard Physics Problem**

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 131 kgand radius R = 80 cm.The engine rotates the wheel at 580 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad is applied at the ...

**Physics**

A disk with a mass of 13 kg, a diameter of 25 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force, F = 70 N,is applied ...

**Physics**

The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 114 kgand radius R = 80 cm.The engine rotates the wheel at 540 rpm. In an emergency, to bring the engine to a stop, the flywheel is disengaged from the engine and a brake pad is applied at the ...

**Physics**

A disk with a mass of 18 kg, a diameter of 50 cm, and a thickness of 8 cm is mounted on a rough horizontal axle as shown on the left in the figure. (There is a friction force between the axle and the disk.) The disk is initially at rest. A constant force, F = 70 N,is applied ...

**algebra**

two planes take off from an airport at the same time and head in opposite directions at 260mph and 275mph respectively. in how many hours will they be 1605 miles apart?

**Physics**

Thank you.

**Physics**

A uniform solid sphere of mass M and radius R is rolling without sliding along a level plane with a speed v = 2.70 m/s when it encounters a ramp that is at an angle è = 20.4° above the horizontal. Find the maximum distance that the sphere travels up the ramp if the ...

**Physics/Calculus**

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.8 m, the bottom of the wheel is 1.8 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions 45° from each ...

**Physics/Calculus**

I tried to solve for the time using: 1.5=-1/2*(9.81)t^2 but I'm not getting the right answer.

**trig**

yes, (√3 + 2√2)/6 is the correct answer/form. thank you for your help!

**trig**

this is the wrong answer..

**trig**

can someone please help me with this problem. i'm doing my review right now and i'm stuck? Find cos(s + t) given that cos s = 1/3, with s in quadrant 1, and sin t = -1/2, with t in quadrant 4.

**Math**

Angle QRS is a straight angle, so a+b+c+d = 180. If a=2c, c=2b, and b=d/3, what are the values of a,b,c,and d?

**11th grade**

Angle QRS is a straight angle. If a=2c, c=2b, and b=d/3, what are the values of a,b,c,and d? a+b+c+d = 180

**INFO TECH**

I AM MAKING A GANTT CHART IN MS PROJECT.I CANNOT CHANGE THE START AND FINISHVDATE...IT IS SOMEHOW BLOCKED TO USE THE DROP DOWN MENU . THE TASK TYPE SAYS IT IS A "FIXED DURATION"...i CANNOT CHANGE THAT EITHER. PLEASE ADVISE!!

**chem**

can someone tell me which of the following elements are expected to be the most easily reduced: Ca, Sr, P, or Cl? thanks Reduction is the gain of electrons. In general, electrons are more easily gained by elements from left to right in the periodic table and from bottom to top...

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