Friday

February 27, 2015

February 27, 2015

Total # Posts: 60

**Physics**

The vector position of a 3.40 g particle moving in the xy plane varies in time according to the following equation. At the same time, the vector position of a 5.05 g particle varies according to the following equation. For each equation, t is in s and r is in cm. Solve the ...
*December 2, 2012*

**computer science **

x is a 16 bit register and x = 8395h. what is the result of the following operation in hexadecimal notation? a: shr(x) b: cil(X) c: ashl(x) d: dshr(x)
*November 6, 2012*

**computer science **

write RTL code for the following 1 bit transition and draw the corresponding logic circuit using D flip-flops: a) if a=1 then copy X to W; other wise copy X to Z b)if a =1 then copy Yto X; other wise copy Y' to X.
*November 6, 2012*

**physics**

derive the formula v0=sqrt((deltaX)squared)*g)/2*deltaY
*October 11, 2012*

**physics**

A steel ball is dropped onto a hard floor from a height of 2.15 m and rebounds to a height of 2.09 m. (Assume that the positive direction is upward.) (a) Calculate its velocity just before it strikes the floor. -6.49 m/s (b) Calculate its velocity just after it leaves the ...
*September 30, 2012*

**physics **

A student drives a moped along a straight road as described by the velocity versus time graph in the figure. The divisions along the horizontal axis represent 1.5 s and the divisions along the vertical axis represent 4.5 m/s. Sketch this graph in the middle of a sheet of graph...
*September 23, 2012*

**physics**

A plane flies from base camp to Lake A, 220 km away in the direction 20.0° north of east. After dropping off supplies it flies to Lake B, which is 150 km at 30.0° west of north from Lake A. Graphically determine the distance and direction from Lake B to the base camp.
*September 12, 2012*

**physics **

A force 1 of magnitude 5.40 units acts at the origin in a direction 45.0° above the positive x axis. A second force 2 of magnitude 5.00 units acts at the origin in the direction of the positive y axis. Graphically find the magnitude and direction of the resultant force 1 + 2.
*September 12, 2012*

**discrete math **

Consider the graph given above. Add an edge so the resulting graph has an Euler circuit (without repeating an existing edge). Now give an Euler circuit through the graph with this new edge by listing the vertices in the order visited. lrc.alasu.edu/webwork2_course_files/MAT256...
*May 6, 2012*

**calculus **

help!! please ...Find the volume of the solid obtained by rotating the region bounded by y=5x+25 y=0about the y-axis
*May 4, 2012*

**calculus **

Find the volume of the solid formed by rotating the region enclosed by y=e^(2x)+1, y=0, x=0,x=0.9 about the y-axis.
*May 4, 2012*

**calculus **

Use the shell method to set up and evaluate the integral that gives the volume of the solid generated by revolving the plane region about the x-axis: Y=sqrt(x+2), y=x,y=4
*May 2, 2012*

**calculus **

find the volume of the solid generated by revolving the region bounded by the graphs of the equations y=2sqrtx, y=o, x=3 about the x-axis.
*May 2, 2012*

**calculus**

Find the volume of the solid formed by rotating the region enclosed by y=e2x+1, y=0, x=0, x=0.9 about the y-axis.
*May 2, 2012*

**calculus**

Find the volume of the solid obtained by rotating the region bounded by y=4x^2,x=1,y=0 about the x-axis.
*April 29, 2012*

**calculus **

Find the volume of the solid formed by rotating the region enclosed by y=e2x+1y=0x=0x=09 about the y-axis.
*April 29, 2012*

**calculus**

Find the area enclosed between f(x)=05x2+3 and g(x)=x from x=−8 to x=3.
*April 29, 2012*

**calculus **

Find the area of the region enclosed by y=6x2 and y=x2+15
*April 29, 2012*

**Discreate Math**

Suppose that a department contains 13 men and 19 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men
*April 9, 2012*

**discrete math**

Suppose that a department contains 10 men and 17 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men?
*April 8, 2012*

**discrete math**

Find how many positive integers with exactly four decimal digits, that is, positive integers between 1000 and 9999 inclusive, have the following properties: (a) are divisible by 5 and by 7. (b) have distinct digits. (c) are not divisible by either 5 or 7.
*April 8, 2012*

**discrete math**

How many strings of five uppercase English letters are there (a) that start or end with the letters BO (in the order), if letters can be repeated? (inclusive or) (b) that start with an X, if letters can be repeated? (c) that start with the letters BO (in that order), if ...
*April 3, 2012*

**discrete math**

Suppose that a department contains 10 men and 17 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men?
*April 3, 2012*

**discrete math**

How many ways are there to select 9 countries in the United Nations to serve on a council if 1 is selected from a block of 60, 3 are selected from a block of 63 and 5 are selected from the remaining 66 countries?
*April 3, 2012*

**discrete math**

How many strings of four decimal digits (Note there are 10 possible digits and a string can be of the form 0014 etc., i.e., can start with zeros.) (a) have exactly three digits which are 9s?
*April 3, 2012*

**calculus**

Use Euler's method with step size 0.2 to estimate y(1), where y(x) is the solution of the initial-value problem. y' = 5x + y^2, y(0)=-1.
*March 14, 2012*

**cal**

Use Euler's method with step size0.4 to estimatey(2) , where y(x) is the solution of the initial-value problem y'=4x+y^2, y(0)=1. . y(2)=
*March 12, 2012*

**calculus**

ln[x^3(x+3)^2((x^2)+4))^7 find the derivative
*February 21, 2012*

**calculus**

find f'(x) -4x^2 lnx
*February 20, 2012*

**cal 2 **

find the derivative ln [x^3 +((x+3)^3)((x^2)+4)^7
*February 19, 2012*

**physics**

The vector position of a 3.75 g particle moving in the xy plane varies in time according to the following equation. At the same time, the vector position of a 5.20 g particle varies according to the following equation. For each equation, t is in s and r is in cm. Solve the ...
*November 27, 2011*

**physic**

A 0.500 kg sphere moving with a velocity (2.00 - 3.10 + 1.00) m/s strikes another sphere of mass 1.50 kg moving with a velocity (-1.00 + 2.00 - 3.30) m/s. (a) If the velocity of the 0.500 kg sphere after the collision is (-0.90 + 3.00 - 8.00) m/s, find the velocity of the 1.50...
*November 27, 2011*

**physics**

An energy-efficient lightbulb, taking in 25.0 W of power, can produce the same level of brightness as a conventional bulb operating at power 100 W. The lifetime of the energy-efficient bulb is 10,000 h and its purchase price is $17.00, whereas the conventional bulb has ...
*November 14, 2011*

**physics**

A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 300 N/m, as shown in the figure below. The spring is unstretched when the ...
*November 14, 2011*

**ph**

A 20.0 kg block is connected to a 30.0 kg block by a string that passes over a light, frictionless pulley. The 30.0 kg block is connected to a spring that has negligible mass and a force constant of 300 N/m, as shown in the figure below. The spring is unstretched when the ...
*November 14, 2011*

**physics**

A 10.0 kg block is released from point A in the figure below. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2300 N/m, and compresses the spring to 0.200 m...
*November 14, 2011*

**physics**

A 4.90 kg particle moves along the x axis. Its position varies with time according to x = t + 3.4t3, where x is in meters and t is in seconds. (a) Find the kinetic energy at any time t. (Accurately round any coefficient to exactly two decimal places. Use t as necessary.) K...
*November 14, 2011*

**physics**

A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. 139 . Your response is within 10% of the correct value. This may be due to ...
*October 25, 2011*

**physics**

A 3.60 kg object is attached to a vertical rod by two strings as in the figure below. The object rotates in a horizontal circle at constant speed 7.15 m/s. (a) Find the tension in the upper string. 139 . Your response is within 10% of the correct value. This may be due to ...
*October 25, 2011*

**physics**

One end of a cord is fixed and a small 0.300 kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.50 m as shown in the figure below. When è = 15.0°, the speed of the object is 6.20 m/s. At this instant, find each of ...
*October 25, 2011*

**physics**

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located at an angle of 35.0&...
*October 25, 2011*

**physics**

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located at an angle of 35.0&...
*October 25, 2011*

**physics**

whenever two Apollo astronauts were on the surface of the moon, a third astronaut orbited the moon, assume the orbit to be circular and 100 km above the surface of the moon, where the acceleration due to gravity is 1.52 m/s^2. the radius of the moon is 1.70* 10^6 m.(a) ...
*October 25, 2011*

**physics**

A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car completes the turn in 38.0 s. (a) What is the acceleration when the car is at B located at an angle of 35.0&...
*October 24, 2011*

**physics**

Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 720 km above the surface of the Moon, where the acceleration due to gravity is 0.839 m/s2. The radius of the Moon is 1.70 106 m. (a) ...
*October 24, 2011*

**physics**

Question Part Points Submissions Used 1 2 3 4 5 0/5 –/5 5/5 0/5 0/5 1/10 0/10 1/10 2/10 2/10 Total 5/25 A car initially traveling eastward turns north by traveling in a circular path at uniform speed as in the figure below. The length of the arc ABC is 210 m, and the car ...
*October 22, 2011*

**physics**

Whenever two Apollo astronauts were on the surface of the Moon, a third astronaut orbited the Moon. Assume the orbit to be circular and 720 km above the surface of the Moon, where the acceleration due to gravity is 0.839 m/s2. The radius of the Moon is 1.70 106 m. (a) ...
*October 22, 2011*

**physics**

Question Part Points Submissions Used 1 2 3 3/3 0/2 0/5 3/10 1/10 1/10 Total 3/10 Consider a conical pendulum with a 90.0 kg bob on a 10.0 m wire making an angle of θ = 3.00° with the vertical. (Consider + to be towards the center of the circular path.) (a) Determine ...
*October 22, 2011*

**physics**

Question Part Points Submissions Used 1 2 3 4 5 –/5 –/5 0/5 –/5 2/2 0/10 0/10 1/10 0/10 2/10 Total 2/22 A block of mass m = 2.00 kg is released from rest at h = 0.400 m from the surface of a table, at the top of a θ = 35.0° incline as shown below. The ...
*October 19, 2011*

**physics**

A 450 g block is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.670, and the coefficient of kinetic friction is 0.380. A force of magnitude P pushes the block forward and downward as shown in the figure below. Assume ...
*October 19, 2011*

**physics**

One end of a cord is fixed and a small 0.300 kg object is attached to the other end, where it swings in a section of a vertical circle of radius 2.50 m as shown in the figure below. When è = 15.0°, the speed of the object is 6.20 m/s. At this instant, find each of ...
*October 18, 2011*

**physics **

A block of mass m = 2.00 kg is released from rest at h = 0.400 m from the surface of a table, at the top of a θ = 35.0° incline as shown below. The frictionless incline is fixed on a table of height H = 2.00 m. (a) Determine the acceleration of the block as it slides ...
*October 17, 2011*

**physics**

In the Atwood machine shown below, m1 = 2.00 kg and m2 = 6.00 kg. The masses of the pulley and string are negligible by comparison. The pulley turns without friction and the string does not stretch. The lighter object is released with a sharp push that sets it into motion at ...
*October 17, 2011*

**physics**

An electron of mass 9.11 10-31 kg has an initial speed of 3.00 105 m/s. It travels in a straight line, and its speed increases to 8.00 105 m/s in a distance of 10.0 cm. (a) Assuming its acceleration is constant, determine the force exerted on the electron. N (in the direction ...
*October 17, 2011*

**physics**

A block is given an initial velocity of 2.00 m/s up a frictionless 23.0° incline. How far up the incline does the block slide before coming (momentarily) to rest?
*October 17, 2011*

**physics**

Question Part Points Submissions Used An aluminum block, m1 = 3.00 kg, and a copper block, m2 = 1.14 kg, are connected by a light string over a frictionless pulley. They sit on a steel surface as shown in the figure below, where θ = 45.0°. (See the table below for ...
*October 17, 2011*

**physics**

A 450 g block is at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.670, and the coefficient of kinetic friction is 0.380. A force of magnitude P pushes the block forward and downward as shown in the figure below. Assume ...
*October 17, 2011*

**5th grade math**

F (use the formula)with -10
*December 9, 2010*

**math**

what would be the ordered pairs for the linear equations 3x +4y = 18 and x + 3y =11
*January 4, 2010*

**social studies**

what are some duties of government that might affect the economy?
*February 25, 2009*

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