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A person needs to swim to shore from Point A and walk to Point B. They can swim at 2mph and walk at 4 mph. Write an expression
1. 1 answer
2. 570 views
If you are estimating a problem like 147 divided by 5, is five a 10?
1. 1 answer
2. 395 views
A fraction of a square mile is a field that is a 1/2 mile long and 1/4 mile wide. What is the fraction?
1. 1 answer
2. 578 views
An air-hockey puck of mass m floats across the table essentially frictionless on a cushion ofair. This puck bumps nearly head-on
1. 1 answer
2. 657 views
I need help with the following Lab due tonight, 7/30/12, as I feel completely lost and would appreciate the help. The lab goes
1. 0 answers
2. 699 views
If an engine produces a (mass flow rate) of100kg/s of thrust, what is the force in Newtons?
1. 0 answers
2. 436 views
A ball (mass m = 250 g) on the end of an ideal string is moving in a circular motion as a conical pendulum. The length L of the
1. 1 answer
2. 5,439 views
A ball (mass m = 250 g) on the end of an ideal string is moving in a circular motion as a conical pendulum. The length L of the
1. 3 answers
2. 816 views
Given y=2-4cos(3x-pi/4), find each of the following, giving the general representation of the location of all minimums. Also
1. 0 answers
2. 731 views
verify identity(sinx-cosx)^2=1-sin(2x)
1. 1 answer
2. 1,002 views
Min's fish are sick,and she wants to add medicine to the tank. The base of the fish tank measures 40 cm by 25 cm.The tank is
1. 1 answer
2. 464 views
Min's fish are sick,and she wants to add medicine to the tank. The base of the fish tank measures 40 cm by 25 cm.The tank is
1. 2 answers
2. 509 views
The density of a 5.0-m long rod can be described by the linear density function λ(x) = 145 g/m + 14.2x g/m2. One end of the rod
1. 2 answers
2. 797 views
Janet jumps off a high diving platform with a horizontal velocity of 1.73 m/s and lands in the water 1.8 s later.How high is the
1. 2 answers
2. 5,432 views
On a frictionless, horizontal air track, a glider oscillates at the end of an ideal spring of force constant 2.30 N/cm. The
1. 2 answers
2. 11,115 views
A mass is oscillating with amplitude A at the end of a spring.How far (in terms of A) is this mass from the equilibrium position
1. 2 answers
2. 5,219 views
A park has a circular swimming pool. The diameter of the pool is 18 ft. What is the distance traveled if you swim around the
1. 1 answer
2. 1,632 views
The distance around the equator of Saturn is about 378,675 km. What is the equatorial diameter of Saturn? Use pi = 3.14.A)
1. 3 answers
2. 598 views
Given that circle Q has a radius of 42, and radii line QR and line QS form an angle of 180, find the exact length of arc RS.
1. 0 answers
2. 462 views
Point A is 5 feet from the center of the circle and 11 feet from point B. Line AB is tangent to circle O at A. Find OB to the
1. 1 answer
2. 392 views
For the following data...1. Provide evidence as to whether this data set if Gaussian or non Gaussian. 2. Determine the normal
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2. 1,219 views
A satellite used in a cellular telephone network has a mass of 2160 kg and is in a circular orbit at a height of 670 km above
1. 1 answer
2. 4,823 views
Four identical masses of mass 900 kg each are placed at the corners of a square whose side lengths are 15.0 cm.What is the
1. 0 answers
2. 652 views
At what distance above the surface of the earth is the acceleration due to the earth's gravity 0.790 m/s^2 if the acceleration
1. 0 answers
2. 569 views
Brandon's bedroom floor is 12ft by 8ft. How many square feet of carpet are needed to replace his old carpet?
1. 1 answer
2. 574 views
June rides the 15 foot tall ferris wheel at the city fair. She enters the ride at the bottom. If the ride makes 8 complete
1. 1 answer
2. 390 views
A stiff uniform wire of mass M_0 and length L_0 is cut, bent, and the parts soldered together so that it forms a circular wheel
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2. 1,109 views
A 5.80 kg ball is dropped from a height of 14.5 m above one end of a uniform bar that pivots at its center. The bar has mass
1. 1 answer
2. 808 views
What is the density of nitrogen gas (molecular mass = 28 u) at a pressure of 1.2 atmospheres and a temperature of 284 K?
1. 1 answer
2. 447 views
A bowling ball rolls without slipping up a ramp that slopes upward at an angle (beta) to the horizontal. Treat the ball as a
1. 1 answer
2. 7,838 views
Use linear approximation, i.e. the tangent line, to approximate (1/0.504) as follows: Find the equation of the tangent line to
1. 1 answer
2. 1,980 views
A 12 foot ladder is leaning against a wall. If the top slips down the wall at a rate of 4 ft/s, how fast will the foot be moving
1. 2 answers
2. 718 views
Water is leaking out of an inverted right conical tank at a rate of 0.0115 m^3/min. At the same time water is being pumped into
1. 0 answers
2. 540 views
A water tank is shaped like an inverted right circular cone with a base radius of 14 feet and a height of 25 feet high. If water
1. 0 answers
2. 754 views
A boat is pulled into a dock by means of a rope attached to a pulley on the dock. The rope is attached to the front of the boat,
1. 0 answers
2. 927 views
A spherical snowball is melting so that its diameter is decreasing at rate of 0.1 cm/min. At what is the rate is the volume of
1. 1 answer
2. 706 views
A street light is at the top of a 19 foot tall pole. A 6 foot tall woman walks away from the pole with a speed of 7 ft/sec along
1. 1 answer
2. 4,367 views
When 0.03 moles of lead(II) nitrate are dissolved in enough water to make 266 milliliters of solution, what is the molar
1. 1 answer
2. 681 views
The heat of vaporization of water is 40.66 kJ/mol. Assuming sweat is 100% water, how much heat is removed from your body through
1. 2 answers
2. 616 views
the volume of a rectangular prism is 256 cubic centimeters. What is the volume of a similar rectangular prism that has edge
1. 1 answer
2. 1,348 views
A 1.1 kg hammer slams down on a nail at 5.0 m/s and bounces back at 1.0 m/s. If the impact lasts 1.0 ms, what average force is
1. 0 answers
2. 685 views
Transform the equation by completing the square:y^2 + 2x - 6y - 7 = 0
1. 1 answer
2. 823 views
Find a unit vector U such that the rate of change of f in the direction of U at the given point is maximum.point being (3,5,pi)
1. 2 answers
2. 901 views
A high-speed sander has a disk 8.00 cm in radius that rotates about its axis at a constant rate of 1100 revolutions per minute.
1. 2 answers
2. 1,294 views
A science museum has asked you to design a simple pendulum that will make 25.0 complete swings in 85.0 {\rm s}.How long should
1. 3 answers
2. 3,816 views
A 750.0 N man, carrying a 1.9 kg physics textbook, stands at the center of a frozen pond of radius 9.0 m. He is unable to get to
1. 1 answer
2. 945 views
A 750.0 N man, carrying a 1.9 kg physics textbook, stands at the center of a frozen pond of radius 9.0 m. He is unable to get to
1. 0 answers
2. 694 views
A child pushes a merry go-round from rest to a final angular speed of 0.78 rev/s with constant angular acceleration. In doing
1. 1 answer
2. 641 views
A 67.7 kg person jumps from rest off a 3.11 m-high tower straight down into the water. Neglect air resistance during the
1. 2 answers
2. 2,764 views
A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed,
1. 0 answers
2. 574 views
Suppose that the weights of airline passenger bags are normally distributed with a mean of 48.08 pounds and a standard deviation
1. 1 answer
2. 1,494 views
On a frozen pond, a 13.2 kg sled is given a kick that imparts to it an initial speed of v0 = 2.48 m/s. The coefficient of
1. 1 answer
2. 636 views
The ratio of cars to vans in a parking lot was 5 to 2. There were 28 cars and vans in the parking lot. How many cars were in the
1. 2 answers
2. 511 views
An airplane leaves the airport and flies due west 170 miles and then 240 miles in the direction 200°30'. Assuming the earth is
1. 0 answers
2. 1,543 views
A car travels at a constant speed around a circular track whose radius is 2.60 km. The car goes once around the track in 344 s.
1. 1 answer
2. 1,109 views
In an analog cellular structure, what is needed to establish a valid authentication?
1. 0 answers
2. 856 views
If a total mass of 11.1 kg falls 5.23 m andall of the mechanical energy is converted to internal energy, by how much will the
1. 0 answers
2. 480 views
OPQRS is a right pyramid whose base is a square of sides 12cm each. Given that the slant height of the pyramid is 15cm. Find the
1. 3 answers
2. 2,559 views
A rocket of mass 4.5 e5 kg is in flight. Its thrust is directed at an angle of 58.5° above the horizontal and has a magnitude
1. 1 answer
2. 442 views
The mass of Aravin to the mass of Bob is in the ratio 17 : 13. If the difference in their masses is 12 kg, find their combined
1. 2 answers
2. 1,020 views
Suppose that 1.78 x 10^3 kg of Fe are obtained from a 5.80 x 10^3 kg sample of Fe2O3. Assuming that the reaction goes to
1. 1 answer
2. 579 views
A classroom table is 1 m wide and 1.75 m long. How many 39 cm wide chairs can fit around the table?
1. 1 answer
2. 416 views
Our big black cat had some kittens, one was white one was black and one was tabby. How many cats lived in our house?
1. 1 answer
2. 390 views
Simplify 2x(x+3)Is it suppose to be 2x^2+6 or 2x^2+6x?
1. 1 answer
2. 284 views
Mean class scored 74 w/ standard deviation of 4.3. What is range of scores for 68% of class?
1. 1 answer
2. 404 views
An oxygen molecule consists of two oxygen atoms whose total mass is 5.3 x 10-26 kg and whose moment of inertia about an axis
1. 1 answer
2. 3,817 views
A wheel of diameter 28.0 cm is constrained to rotate in the xy plane, about the z axis, which passes through its center. A force
1. 130 answers
2. 4,097 views
find the value of the functionk(p/q)
1. 1 answer
2. 855 views
I need help with my test, I don't know if they are all right or not. I answered the questions to the best of my ability. My
1. 8 answers
2. 2,656 views
If 20% of the people in a community use the emergency room at a hospital in one year, find the probabilities for a sample of 10
1. 1 answer
2. 1,520 views
Hello, I'm not sure if my answers are correct. Can someone review my work to make sure its right. My answers are marked with an
1. 1 answer
2. 712 views
A solution of sodium hydroxide is 8.20M and has a density of 1.20g/mL. What is the mole fraction of sodium hydroxide in the
1. 1 answer
2. 440 views
What is the correct significant figures of14.2 • 8.5 Options: 121 120 100 120.7 also can you explain why the one you picked is
1. 1 answer
2. 467 views
At t = 0 s a flywheel is rotating at 30 rpm. A motor gives it a constant acceleration of 0.9 rad/s^2 until it reaches 70 rpm.
1. 1 answer
2. 1,230 views
Because of the Earth’s curvature, a person can see a limited distance to the horizon. The higher the location of the person,
1. 0 answers
2. 757 views
Find the variation constant in which y varies inversely as x, and the following condition exists.Y=30 when x=1/6 K=
1. 3 answers
2. 507 views
The electrical resistance of a wire is directly proportional to its length. If a 3-foot long wire has a resistance of 1 ohm(s),
1. 1 answer
2. 775 views
The maximum safe load of a rectangle beam varies jointly as its width and the square of its depth and inversely as the length of
1. 1 answer
2. 935 views
The kinetic energy of a moving body is directly proportional to its mass and the square of its speed. If the mass of a bullet is
1. 0 answers
2. 985 views
If y varies jointly as w and x, and y is 483 when x is 742 and w is 383, find y when x is 274 and w is 756.
1. 1 answer
2. 512 views
Let f(x)=3x^5+5x^3+15x+15.Use Rolle's Theorem to show that f(x) has exactly one root.
1. 1 answer
2. 1,166 views
A shipping company received an order of 1645 packages. The manager needs to determin the mean weight of the packages. (A) How
1. 0 answers
2. 624 views
Ticket sales for opening night of a movie have a mean of $2100 with a standard deviation of $450. Assume these ticket sales
1. 1 answer
2. 443 views
Why isn't the absolute value inequality (x^2-1)</=8 set up as -8<x^2-1<8 yielding -7<x^2<9 so +/-sqrt-7<x<+/-sqrt9 so
1. 0 answers
2. 424 views
Find the mystery number. Three less than the quotient of the number and five is negative fifty-two.
1. 1 answer
2. 368 views
In a population of 240 women,the heights of the women are normally distributed with a mean of 64.2 inches and a standard
1. 0 answers
2. 1,219 views
Absolute Value (x^2-1)<8, I keep coming up with +/- isqrt7< x < +/- 3 but its wrong.
1. 3 answers
2. 374 views
Two identical boats travel through still water at 3 m/s. They start from the same point, one travels parallel (and antiparallel)
1. 0 answers
2. 455 views
Trying to solve this rational inequality but can't figure how to factor the numerator. ((3x-2x^2)/(4-x^2))<((3+x)/(2-x))
1. 2 answers
2. 906 views
Which one of the following is not a project risk?a)Political Risk b) Department Risk c) Technical Risk d) Schedule Risk e)
1. 1 answer
2. 1,341 views
In a coffee cup calorimeter, 50.0 mL of 0.100 MAgNO3 and 50.0 mL of 0.100 M HCl are mixed to yield the following reaction: Ag+
1. 2 answers
2. 2,580 views
there is a massless rope that is pulled over a frictionless pulley that is suspended high above the ground one end of the rope
1. 0 answers
2. 598 views
A car starts from rest and accelerates unifomly at 3m/s^2. A second car starts from rest 6 seconds later at the same point and
1. 1 answer
2. 2,714 views
What mass of NaCl is needed to precipitate all the silver ions from 20.0 mL of 0.100 M AgNO3 solution?
1. 1 answer
2. 938 views
Mars has a mass of about 6.8 × 1023 kg,and its moon Phobos has a mass of about 9.5 × 1015 kg. If the magnitude of the
1. 1 answer
2. 730 views
If f(x)=[(x−1)/(1+5x)], there are two points on the graph ofy=f(x) at which the tangent lines are parallel to the line
1. 1 answer
2. 692 views
Tight junctions prevent the movement of the extracellular matrix between cells.A) True B) False Which one is it please :)
1. 0 answers
2. 388 views
Tight junctions prevent the movement of the extracellular matrix between cells.A) True B) False Which one is it please :)
1. 0 answers
2. 386 views
Piecewisef(x) = { (x^2, x<=2) (mx + b, x>2) I am not sure what the graph would look like for the 2nd function. Any tips on
1. 1 answer
2. 590 views
A foundry releases 6.0 tons of gas into the atmosphere every day. The gas mixture contains 2.5% sulfur dioxide (SO2) by wieght.
1. 1 answer
2. 509 views

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