Wednesday

April 23, 2014

April 23, 2014

Total # Posts: 126

**physics**

an aluminium of mass 2.1 kg rests on a steel platform. A horizontal force of 15N is applied to block(a) given the coefficient of limiting friction is 0.61 will the block move? (b)if it moves what will be its acceleration?

**Physics**

Problem 1- A 4 kg puck can slide with negligible friction over a horizontal surface, taken as the xy plane. ˆ The puck has a velocity of 3i m / s at one instant ti = 0 . Eight seconds later, its velocity is to be ˆˆ 8i + 10 j m / s . Find the magnitude and direc...

**Physics**

Problem 3- Blocks A, B, and C are connected by ropes and placed as in the figure. Both A and B weigh 22.6 N each, and the coefficient of kinetic friction between each block and the surface is 0.40. Block C descends with constant velocity. a) Draw free-body diagram of objects A...

**Physics**

A 4 kg puck can slide with negligible friction over a horizontal surface, taken as the xy plane. ˆ The puck has a velocity of 3i m / s at one instant ti = 0 . Eight seconds later, its velocity is to be ˆˆ 8i+10 j m / s . Find the magnitude and direction of the n...

**Physics **

The maximum possible value for the coefficient of static friction ?

**Physics**

An 100kg box is placed on the ramp. As one end on the ramp is raised the box begin to move down ward just as the angle of inclination reaches 15 degree . What the coeffenict of static friction between box and ramp .. ?

**Physics **

A500 man stands at the center of the rope such that each half of the ropes makes an angle of 10 with the horizentle . What is the tension of the rope ???

**Physics **

A15N crate rests on an ramp , the maximum angle just before it slips is 25 degree with the horizantle , what the coefficient of static friction between the crate and ramp surfaces ?

**Physics**

Thank you

**Physics **

Acceleration due to gravity on the moon's surface is 1/6th that on the earth . An object weight 900N on the earth . What does it weight on the moon ?

**Physics **

At t=0, a particle leaves the origin with a velocity 6m/s in the positive x direction and moves in the x-y plane with a constant acceleration (-2i-4j)m/s2 How far the particle from the origin at t=1 ?

**math**

two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.their lengths are 10cm and 24cm. what is the distance between the chords

**Physics **

Problem 2- 1. As a ship is approaching the dock at 45 cm/s, an important piece of landing equipment needs to be thrown to it before it can dock. This equipment is thrown at 15.0 m/s at 60∘ above the horizontal from the top of a tower at the edge of the water, 8.75 m abov...

**Physics**

Problem 2- A boat has a velocity of 0.54 m/s southeast relative to the earth. The boat is on a river that is flowing 0.60 m/s east relative to the earth

**Physics**

Help

**Physics**

Problem 1- A dog running in an open field has components of velocity vx = 2.2m/s and vy = -2.5m/s at time t1 = 12 s. For the time interval from t1 = 12 s to t2 = 24 s , the average acceleration of the dog has magnitude 0.55 m/s2 and direction 25.5∘ measured from the +x&#...

**Physics **

A students adds two vectors with magnitude of 200 and 40 , what is the resultant ?!

**Physics **

Ahmad throws a ball straight up. For which situation is the vertical velocity zero? [Note: Neglect the air resistance] Answer at the top on the way up none of the above on the way down

**Physics **

1)The speedometer on a car’s dashboard measure average speed average velocity instantaneous acceleration instantaneous speed 2)A car moving on a straight road increases its speed from 30 m/s to 50 m/s in a distance of 180 m. If the acceleration is constant, how ...

**Physics **

A rocket, initially at rest, is fired vertically with an upward acceleration of 10 m/s2. At an altitude of 500 m, find its velocity. 1000 m/s 500 m/s 100 m/s 10 m/s

**Physics **

Problem 4- Speedy car, driving at 30 m/s. The driver suddenly observes a slow-moving van 155 m ahead traveling at 5 m/s in the same direction. The driver of the car immediately applies the brakes causing a constant acceleration of 2 m/s2 in a direction opposite to the cars vel...

**Physics**

Can I solve it in the equation of motion in one dimension ????

**Physics **

Problem 3- If a bug can jump straight up to a height of 0.5 m. a) what is its initial speed as it leaves the ground? b) How long is it in the air?

**Physics**

Thank you

**Physics **

Problem 2- A car is stopped at a traffic light. It then travels along a straight road so that its position from the light is given by x(t) 2.5t - 0.13t^2 in meters. c. What is the position of the particle when it reverses its motion?

**Physics plz **

Do any teacher here have an email plz becouse I want to send some pictures for question ,,, physics plz or how can I attach picture here ????

**Grammar**

1)answer : alternative and solution

**Grammar**

Solution-dependence-alternative (find) Answer:alternative and dependence Resources-technology-stocks(deplete) Answer:Resources and stocks Now is it correct ??

**Grammar**

Development-environment-figures. (Recent) Answer:development and environment Now ?

**Grammar **

Development-environment-figures. (Recent) Answer:environment and figures Situation-quantity-interest. (Sufficient ) Answer:quantity and interest Now is it correct ??

**Grammar**

Thanks a lot sir

**Grammar**

1)better 2)important 3)distinct (Advantages) Important and distinct Last choice

**Grammar**

Hhhhh yes becouse I don't know the rule

**Grammar**

1)affordable 2)rising 3)rapid. (Prices) Rising and affordable 1)better 2)important 3)distinct (Advantages) Better and distinct Now ?

**Grammar **

1)upward 2)growing 3)recent (Problem) Recent and growing 1)steady 2)severe 3)reliable. (Supply) Steady and reliable 1)available 2)increasing 3)public. (Concern) Public and increasing 1)immediate 2)effective 3)sufficient. (Solution) Immediate and effective 1)affordable 2)risin...

**Grammar**

1)upward 2)growing 3)recent (Problem) Recent and growing 1)steady 2)severe 3)reliable. (Supply) Steady and reliable 1)available 2)increasing 3)public. (Concern) Public and increasing 1)immediate 2)effective 3)sufficient. (Solution) Immediate and effective 1)affordable 2)risin...

**Grammar**

Can you tell me what's correct ?

**Grammar**

Circle the adjectives that can be used with the nouns on the right . 1)upward 2)growing 3)recent (Problem) Upward and growing 1)steady 2)severe 3)reliable. (Supply) Sever and reliable 1)available 2)increasing 3)public. (Concern) Available and increasing 1)immediate 2)effective...

**Grammar**

Development-environment-figures. (Recent) Answer:environment and figures Situation-quantity-interest. (Sufficient ) Answer:quantity and interest Now is it correct ??

**Grammar**

Circle the nouns that can be used with the adjectives on the right , Development-environment-figures. (Recent) Answer:development and environment Crisis-supply-estimates. (Reliable) Answer:supply and estimates Awareness-theory-concern. (Public) Answer:Awareness and concern Reg...

**Grammar**

Solution-dependence-alternative (find) Answer:alternative and dependence Resources-technology-stocks(deplete) Answer:Resources and stocks Now is it correct ??

**Grammar**

Thank you

**Grammar **

Circle the nouns that can be used with the verbs on the right . Engine-consumption-dependence (reduce) Answer : consumption and dependence Solution-dependence-alternative (find) Answer:solution and dependence Resources-technology-stocks(deplete) Answer:Resources and technology...

**Calculus**

(c) theline x=2 (d) the line y = −2

**Calculus **

5. Find the volume of the solid generated by revolving the region bounded by y = x2, y = 0 and x = 1 about (a) the x-axis (b) the y-axis

**Calculus **

4. Find the volume of a pyramid of height 160 feet that has a square base of side 300 feet

**Calculus **

3. Find the volume of the solid with cross-sectional area A(x) = 10 e^0.01x, 0 ≤ x ≤ 10.

**Calculus**

Any answer

**Calculus**

(c) y=x2,y=2−x,and the vertical linex=2

**Calculus **

Find the integral of sin(x) cos(x)/sin^2(x)-4 dx

**Calculus**

(c) find the integral of 1/squrt (x^2+2x+10) dx

**Calculus**

(c) find the integral of e^x/ e^3x + e^x dx

**calculus**

(c) find the integral of e3x + ex dx

**English**

How ?

**English**

Circle the nouns that can be used with the adjectives on the right , Development-environment-figures. (Recent) Crisis-supply-estimates. (Reliable) Awareness-theory-concern. (Public) Region-prices-solution. (Affordable) Protection-needs-sanitation. (Adequate ) Situation-quantit...

**Grammar**

Circle the nouns that can be used with the verbs on the right . Engine-consumption-dependence (reduce) Solution-dependence-alternative (find) Resources-technology-stocks(deplete) Quantity-problems-question(solve) Energy-crisis-shortage (face) Possibility-problems-century(exami...

**Grammar**

Circle the nouns that can be used with the adjectives on the right , Development-environment-figures. (Recent) Crisis-supply-estimates. (Reliable) Awareness-theory-concern. (Public) Region-prices-solution. (Affordable) Protection-needs-sanitation. (Adequate ) Situation-quantit...

**Grammar**

From we're ?

**Grammar **

Circle the adjectives that can be used with the nouns on the right . 1)upward 2)growing 3)recent (Problem) 1)steady 2)severe 3)reliable. (Supply) 1)available 2)increasing 3)public. (Concern) 1)immediate 2)effective 3)sufficient. (Solution) 1)affordable 2)rising 3)rapid. (Price...

**Physics**

2-A 10.0 Kg block is released from point A in the figure below. The block travels along a smooth frictionless track except for the rough 1 m long portion between points B and C. It makes a collision with stationary 10 kg ball after passing point C. The ball moves forward with ...

**Physics**

1- A 5.0 kg block moving east with speed of 6 m/s collides head on with another 8.0 kg block moving west with speed of 4 m/s. After the collision the 5.0 kg block was moving west with speed of 5 m/s while the 8.0 kg block was moving east. a) What is the speed of the 8.0 kg blo...

**Calculus **

1. Evaluate the following integrals (a) 4x2 +6x−12 / x3 − 4x dx

**Physics**

3- A 5.0 Kg block is released from point A in the figure below. It travels along the smooth surface A E except for the part B C where the surface is rough. Point A is 3 m above the lowest point C. The block continues in its motion up the surface until reaches...

**Physics**

Please I need the answer

**Physics**

3- A 5.0 Kg block is released from point A in the figure below. It travels along the smooth surface A E except for the part B C where the surface is rough. Point A is 3 m above the lowest point C. The block continues in its motion up the surface until reaches...

**Physics **

2-A 10.0 Kg block is released from point A in the figure below. The block travels along a smooth frictionless track except for the rough 1 m long portion between points B and C. At the end of the track, the 10 kg block hits a spring of force constant (k) = 2000 N/m, and compre...

**Physics**

1- A mass m is pushed against a spring of spring constant k = 12000 N/m. The mass slides on a horizontal smooth surface except for a rough one meter long section, and then it encounters a loop of radius R as shown in the figure. The mass just barely makes it around the loop wi...

**Physics**

A long wire carries a current of 20 A along the directed axis of a long solenoid. The field due to the solenoid is 4 mT. Find the field at a point 3 mm from the solenoid axis.

**Physics**

A long wire carries a current of 20 A along the directed axis of a long solenoid. The field due to the solenoid is 4 mT. Find the field at a point 3 mm from the solenoid axis.

**The Age Of Jefferson To The American Expansion**

which one of the answers aren't right?tell me so I can know and maybe help you!!

**chemistry**

HELPPPP!!!! This is a lab, and i need help with the equations please!! Thank you !! Heat of fusion data table : Mass of foam cup = 3.57g Mass of foam cup + warm water = 104.58g Mass of foam cup + warm water + melted ice = 129.1g Temperature of warm water = 37 degrees celcius. ...

**Geometry**

Write a two column proof proving figure ABCD is a rhombus. Given - diagonal BC.

**Chemistry**

A 35.0 g block of copper at 350.0 degrees celcius is added to a beaker containing 525 g of water at 35.0 degrees celcius. What is the final temperature of water?

**Chemistry**

A 335g block of copper cools from 95.0 degrees celcius to 27.2 degrees celcius when it is put in a beaker containing water at 22.4 degrees celcius. What is the mass of the water in the beaker?

**Chemistry**

7750 J of energy is added to a 325g stone at 24.0 degrees celcius. The temperature increases by 75.0 degrees celcius. What is the specific heat of the stone?

**Chemistry**

How much heat is required to raise the temperature of a 35.0g block of aluminium from 125 degrees celcius to 322 degrees celcius?

**Chemistry**

How much heat is required to raise the temperature of a 125g block of iron from 17.5 degrees celcius to 82.3 degrees celcius?

**Chemistry**

A 25.0 g block of copper at 350.0 degrees celcius has 857J of heat added to it. What is the final temperature of the block of copper?

**chemistry**

how much heat is required to raise the temperature of a 35 gm block of aluminum from 125 to 322 degrees?

**chemistry**

The molar enthalpy of vaporization for water is 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram. b. The molar enthalpy of fusion for water is 6.009 kJ/mol. Express this enthalpy of fusion in joules per gram.

**humanities s.s**

What are two pitfalls when examining opposing viewpoints

**chemistry**

What is the energy of an electron with a principle quantum number of n=2

**math**

Michel is twice as old as his sister sylvia. In four years three times Micheal's age is equvialent to five times of sylvia's age. How old is Micheal now

**Chemistry**

What is the possible ionic equation of TrisEDTA solution? REDOX reaction.

**Physics**

A block of aluminum that has dimensions 2.07 cm by 2.55 cm by 5.00 cm is suspended from a spring scale. The density of aluminum is 2702 kg/m^3. (a) What is the weight of the block? 0.699 N (b) What is the scale reading when the block is submerged in oil with a density of 817 k...

**physics**

Part (a) should be convex. Part (b)You have to put the height of your image over the height of your object, like a ratio. Once you do that, multiply that answer by the "20cm." Your answer should be a negative. Part (c) Use the equation: 1/do+1/di=1/f Part (d) Multipl...

**reading**

Thank You Very Much

**reading**

What steps you would take in order to be a writer when you grow up? PLEASE HELP I DON'T KNOW WHO TO ANSWER THIS QUESTION

**Algebra 2**

x(1/2) - 5 sqrt 3x(1/4) + 18 = 0

**Algebra 2**

x(1/2) - 5 sqrt 3x(1/4) + 18 = 0

**S.S (help please)**

thank you!

**S.S (help please)**

Which language is spoken by most people in Brazil because of that countrys colonial heritage? I think the answer is Spanish.. am i right?

**Math 9th grade**

x(1/2) - 5 sqrt 3x(1/4) + 18 = 0

**Math**

Monica has 8 more 3 times the number of marbles Regina has. If Regina has r marbles, how many does Monica have? __________ marbles If Regina has 12 marbles , how many dies Monica have? ________ marbles PLEASE HELP!

**Math**

I think the answer is t-3 and d/2 ? Am I Right Please Help!

**Math**

Trisha is t years old.If Kyle is 3 years younger than Trisha, then Kyle is ___________years old Damien has d DVDS. If Nadia has half as many as DVDS as Damien, then Nadia has _______ DVDS please help

**math 6th grade**

10^-6

**Math**

The base of a rectangle is twice the length of the height. If the height of the rectangle is h inches,what is the length of the base? ______________ inches If the height of the rectangle is 4 inches what is the length of the base? ________ inches PLEASE HELP!

**Math**

3^2*3^3=3^5 7*0.1=7/10 5^2*5^3=5^5 3*0.1=3/10 13^2*13^3=13^5 4*0.1=4/10 For each set of special cases, write a general pattern. HELP I DONT GET THIS!!

**writing**

about the diffrent between the life in past and in the nowaday life