# Posts by natasha

Total # Posts: 427

**math**

6 ⅚ – 17/18 Solve the following problem and convert to lowest terms (mixed number)

*October 26, 2013*

**reading skills**

(1) After my interview with these four young people, I reflected on the quiet sense of "difference" I sensed with many of these Upward Bound students. (2) As a college teacher who has also taught seventh-grade science, I have some experience with the faces and ...

*October 13, 2013*

**Mathematics**

If a 75 kg person pedals a Monarch leg ergometer at 50 rpm, how much resistance is needed to work at a level of 11 METs?

*October 6, 2013*

**Mathematics**

What stepping rate is needed if a person wants to work at a Vo2 of 45 mL/kg/min using a bench that is 34 cm high?

*October 6, 2013*

**Math**

If a 60 kg man is riding a Monarch ergometer at 50 rpm and the resistance is 2.0 kg, what is the power output?

*October 6, 2013*

**Math**

Who is working harder, Fred running a 10 min mile pace at a 10% grade or Pete who is 55 kg, cycling on a Monarch ergometer with a resistance of 2.5 kg and a pedal rate of 60 rpm?

*October 6, 2013*

**Math**

If an individual wants a work of 1300 kg m/min with a cycling speed of 300 m/min, how much resistance is needed?

*October 6, 2013*

**Math**

Determine the MET level for each activity for a 70 kg person. a.) 18 steps/min, 25 cm/step b.) 6 mph, 12% grade c.) 750 kg m/m on a Monarch ergometer d.) Arm cranking at 350 kg m/min on a Monarch ergometer

*October 6, 2013*

**Math**

What is the MET level of a person that is running on a level treadmill at 6 mph?

*October 6, 2013*

**Math**

What is the functional capacity in METs and Vo2 (mL/kg/min) of a 70 kg man who completed Stage V (3mph, 12.5% grade) of a Balke TM test?

*October 6, 2013*

**Math**

A patient must exercise a MET level of 8. What grade is needed if the speed is 3 mph?

*October 6, 2013*

**Chemistry**

How many grams of nitric acid (HNO3) must be dissolved in 740 mL of water to make a solution with a pOH = 8.3?

*May 12, 2013*

**Maths**

The second term in the expansion of (1-x)(1+2x)Λn is 19x. Find the value of n

*May 12, 2013*

**math**

The second term in the expansion of (1-x)(1+2x)Λ4 is 19x. Find the value of n

*May 10, 2013*

**math**

A rectangular plot is bounded at the back by a river. No fencing is needed along the river and there is to be an opening in front of about 24 meters. If the cost of fencing in front is $1500 per meter and the cost of fencing the sides is $1000 per meter, find the dimensions of...

*April 25, 2013*

**math**

A bag contains 5 red balls and 7 green balls . A ball is picked at random , its color is noted and it is given out . The bag is shaken and a second selection is made. A. Draw. Tree diagram to illustrate thr information. B. Calculate the probability that both balls are red

*April 24, 2013*

**Math**

A customer is buying a $100 drill and two $15 drill bit stes. The customer uses a $50 gift card for a portion of thier bill. How much cash will the customer pay (before taxes)?

*April 15, 2013*

**7th Grade Social Studies**

1.a 2.c 3.c 4.b 5.c 6.a 7.c 8.d 9.b 10.a 11.c 12.a 13.b 14.c 15.b 16.d 17.c these are the answers other peeps were wrong

*March 29, 2013*

**Algebra 2**

a.) the number of terms b.) the first term c.) the last term d.) evaluate the sum 5 E (3+n) n=1 8 E 2n/3 n=1 I don't know what the symbol is for the equation but it looks like an "E"

*February 26, 2013*

**physics**

A spherical surface completely surrounds a collection of charges. Find the electric flux (with its sign) through the surface if the collection consists of (a) a single +1.80 × 10-6 C charge, (b) a single -8.20 × 10-6 C charge, and (c) both of the charges in (a) and (b

*February 25, 2013*

**physics**

A small drop of water is suspended motionless in air by a uniform electric field that is directed upward and has a magnitude of 12300 N/C. The mass of the water drop is 4.71 × 10-9 kg. How many excess electrons or protons reside on the drop?

*February 25, 2013*

**physics**

A string has a linear density of 8.1 x 10-3 kg/m and is under a tension of 200 N. The string is 2.9 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c) frequency of the traveling ...

*February 11, 2013*

**physics**

A container holds 2.2 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 7.7x10-3 kg bullet with a speed of 650 m/s. What is the Kelvin temperature of the gas?

*January 28, 2013*

**physics**

The flywheel of an engine has a moment of inertia of 24 kg*m^2. a) if the radius of the wheel is 0.6m, what force is required to accelerate the wheel from rest to an angular velocity of 300 rpm in 6 seconds? b) how many turns does it make during this time?

*December 12, 2012*

**physics**

The flywheel of an engine has a moment of inertia of 24 kg*m^2. a) if the radius of the wheel is 0.6m, what force is required to accelerate the wheel from rest to an angular velocity of 300 rpm in 6 seconds? b) how many turns does it make during this time?

*December 12, 2012*

**psychology**

no recovery has been reported with schizophrenia,

*December 9, 2012*

**science/math**

width of a normal sheet of paper is 8.5inches. Convert this length to kilometers

*November 17, 2012*

**Science**

A mixture is prepared by adding 100 ml of 0.10M Na2CrO4 to 100.ml of ).10 N AgNO3. A precipitate forms in this mixture. The precipitate is separated from the mixture by filtration. Question: What quantity of solid product is produced?

*November 2, 2012*

**math**

Morgan Company received from Lee Company an invoice dated September 27. Terms were 2-10 EOM. List price on the invoice was $5000.00(freight not included). Morgan receives a 9/7 chain discount. Freight charges are Morgans resposibility but Lee agreed to prepay the $150. freight...

*October 22, 2012*

**algebra 2**

4p + 2q = 8 and q = 2p +1 solve by substitution

*October 18, 2012*

**chemistry**

an ionic equation has 2H+(AQ)on the left side and H2(g) on the right. Are these species spectators? explain.

*October 15, 2012*

**trig**

Find the domain of each function. f(x)=Sqareroot of 5-x f(x)=x^3/x^2-16

*October 9, 2012*

**pre calculus**

Algebraically solve the system of equations using any method you wish 3x-10y+z=5 -4x+9y-z=-6 -13y+z=2

*October 7, 2012*

**drawing**

well my teacher miss whitcombe has told me to draw a hybrid creature from various parts of insects/machines can anyone help me? many thanks

*October 3, 2012*

**math**

you can multiply 90 times 30 and 9 times 8 and add them

*October 1, 2012*

**english**

1. c 2. b 3. c 4. a 5. a I got 5/5 (100%).

*September 20, 2012*

**pre calculus**

find the real zeros of f(x)=x^4+6x^3-11x^2-24x+28

*September 17, 2012*

**pre calculus**

solve the following inequality 4x-3/x+4 less than or equal too 3

*September 17, 2012*

**pre calculus**

1/3log(base7) x=2log(base7)4 Solve for x?

*September 17, 2012*

**physics**

In many countries, automatic number plate recognition is used to catch speeders. The system takes a time-stamped license plate photo at one location (like an on-ramp to a freeway), and then takes a second time-stamped photo at a second location a known distance from the first ...

*September 1, 2012*

**biology**

ya'll nuts

*August 24, 2012*

**Chemistry**

500ml of 0.250M Na2SO4 solution is added to an aqueous solution of 15.00 g of BaCl2 resulting in the formation of white precipitate of BaSO4. How many moles and how many grams of BaSO4 are formed?

*August 9, 2012*

**literature**

Is it B Ms. Sue? I believe it's B.

*July 22, 2012*

**physics**

Two resistors, 68.0 Ω and 74.0 Ω, are connected in parallel. The current through the second resistor is 4.60 A. (a) Determine the current in the first resistor? (b) What is the total power supplied to the two resistors?

*July 6, 2012*

**physics**

A moving particle encounters an external electric field that decreases its kinetic energy from 9100 eV to 6630 eV as the particle moves from position A to position B. The electric potential at A is -59.5 V, and the electric potential at B is +26.1 V. Determine the charge of ...

*July 4, 2012*

**physics**

but i need two ansers for the epe of charge 3 at point a and b. do I just multiply the vtotal by q3 then multiply each charge by that to get the numer for pt a and b

*July 4, 2012*

**physics**

more info needed here are the other charges q1= +1.5e-9 q2=+4.0e10-9

*July 4, 2012*

**physics**

The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at the corners of the square. Find the electric potential energy of a third charge q3 = -4.35 10-8 C placed at corner A and then at corner B.

*July 4, 2012*

**physics**

A moving particle encounters an external electric field that decreases its kinetic energy from 9100 eV to 6630 eV as the particle moves from position A to position B. The electric potential at A is -59.5 V, and the electric potential at B is +26.1 V. Determine the charge of ...

*July 3, 2012*

**physics**

Two charges, -17 and +3.6 µC, are fixed in place and separated by 3.2 m. a) At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the positive charge. (Hint: The spot does not necessarily lie between the two charges. (...

*July 3, 2012*

**physics**

An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.3 µC at this spot?

*July 3, 2012*

**physics 2**

Two charges, -17 and +3.6 µC, are fixed in place and separated by 3.2 m. (a) At what spot along a line through the charges is the net electric field zero? Locate this spot relative to the positive charge. (Hint: The spot does not necessarily lie between the two charges...

*July 2, 2012*

**physics 2**

An electric field of 264,000 N/C points due west at a certain spot. What are the magnitude and direction of the force that acts on a charge of -6.3 µC at this spot?

*July 2, 2012*

**physics**

The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 351 kg. A person pushes down on the middle of the front ...

*April 18, 2012*

**physics**

The shock absorbers in the suspension system of a car are in such bad shape that they have no effect on the behavior of the springs attached to the axles. Each of the identical springs attached to the front axle supports 351 kg. A person pushes down on the middle of the front ...

*April 18, 2012*

**physics**

Two disks are rotating about the same axis. Disk A has a moment of inertia of 3.7 kg · m2 and an angular velocity of +7.3 rad/s. Disk B is rotating with an angular velocity of -9.5 rad/s. The two disks are then linked together without the aid of any external torques, so...

*April 18, 2012*

**Physics**

A 9.67-m ladder with a mass of 25.0 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 242 N. At the instant the top of the ladder leaves the ground, the ladder experiences an angular acceleration of 1.94 rad/s2 ...

*April 18, 2012*

**physics**

Jahna and Raul move onto the setup for experiment 2. They have been asked to determine both the mass of the rod and the mass of the hanging object. They know the length of the rod, the position of the hanging mass, anf the positions and readings of the scales. Determine the ...

*April 16, 2012*

**physics**

Thank You!

*April 16, 2012*

**physics**

Two students, Jahna, and Raul, re performing Experiment 1. To simplify their calculations, each will apply their force perpendicular to the arm of the apparatus. Jahna attaches her spring scale 15cm from the pivot and pulls with a force of 2.5N. Raul attaches his springs scale...

*April 16, 2012*

**Physics**

A grindstone of radius 4.0m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 12 rad/s over 4.0s. Assume that the angular acceleration is constant. What is the average angular speed of grindstone?

*April 2, 2012*

**Physics**

The earth has a radius of 6.38 106 m and turns on its axis once every 23.9 h. A. What is the tangential speed (in m/s) of a person living in Ecuador, a country that lies on the equator? (b) At what latitude (i.e., the angle θ in the drawing) is the tangential speed two-...

*March 30, 2012*

**physics**

Some bacteria are propelled by biological motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.70e-8 m, and a tangential speed at the rim of 2.32 e-5 m/s. a) What is the angular speed (the magnitude of the ...

*March 30, 2012*

**Physics**

A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration of 0.180 rad/s2. After making 2874 revolutions, its angular speed is 139 rad/s. A. What is the initial ...

*March 30, 2012*

**physics**

hi there thanks for trying to help, although my tutor has given the answer as 0.233m. So l am therefor still puzzled by this question ... please help!!!

*March 28, 2012*

**physics**

A block with a mass of 0.5kg is pushed against a horizontal spring of negligible mass and spring constant 450 N/m until the spring is compressed a distance x. When it is released, the block travels along a frictionless, horizontal surface to the bottom of a verticle circular ...

*March 28, 2012*

**physics**

A 1000kg car accelerates from rest to 30m/s over a distance of 20m. a) ignoring friction and air resistance, what is the power generated by the motor? b) if the friction and air resistance is 200N, what is the power generated by the motor?

*March 28, 2012*

**Physics**

ans = 17.85kgm/s^2

*March 17, 2012*

**physics**

The (nonconservative) force propelling a 1.50 103-kg car up a mountain road does 5.10 106 J of work on the car. The car starts from rest at sea level and has a speed of 31.5 m/s at an altitude of 1.90 102 m above sea level. Obtain the work done on the car by the combined ...

*March 14, 2012*

**Physics**

A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 45.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact.

*March 14, 2012*

**Physics**

Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.40 1011 m apart. The larger of the two stars has a mass of 3.40 1030 kg, and its center is 2.50 1011 m from the system's center of mass. What is the mass of the smaller star?

*March 13, 2012*

**Physics**

Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as shown below, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic frictional forces acting...

*March 13, 2012*

**physics**

By accident, a large plate is dropped and breaks into three pieces. The pieces fly apart parallel to the floor, with v1 = 3.15 m/s and v2 = 1.50 m/s. As the plate falls, its momentum has only a vertical component, and no component parallel to the floor. After the collision, ...

*March 13, 2012*

**physics**

A 1100-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 518 N. A force is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act ...

*March 13, 2012*

**physics**

A 1100-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 518 N. A force is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act ...

*March 13, 2012*

**Physics**

A car accelerates uniformly from rest to 21.0 m/s in 6.1 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if the weight of the car is the following. A) 8.0e3N B) 1.2e4N

*March 13, 2012*

**physics**

When I did this I got the answer 12.91 prior to you responding to me and when I tried the way you said I received the same answer but our software is telling me that its wrong and i tried twice.

*March 12, 2012*

**physics**

A baseball (m = 151 g) approaches a bat horizontally at a speed of 39.8 m/s (89 mi/h) and is hit straight back at a speed of 45.7 m/s (102 mi/h). If the ball is in contact with the bat for a time of 1.05 ms, what is the average force exerted on the ball by the bat? Neglect the...

*March 12, 2012*

**Physics**

A car accelerates uniformly from rest to 21.0 m/s in 6.1 s along a level stretch of road. Ignoring friction, determine the average power required to accelerate the car if the weight of the car is the following. A) 8.0e3N B) 1.2e4N (The answer needs to be in Watts)

*March 12, 2012*

**Physics**

A 1100-kg car is being driven up a 4.0° hill. The frictional force is directed opposite to the motion of the car and has a magnitude of f = 518 N. A force is applied to the car by the road and propels the car forward. In addition to these two forces, two other forces act ...

*March 12, 2012*

**physics**

A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.

*March 12, 2012*

**physics**

A car (mass=1100kg) is traveling at 32m/s when it collides head on with a sport utility vehicle (mass=2500kg) traveling in the opposite direction. In the collision, the two vehicles come to a halt. at what speed was the sport utility vehicle traveling.

*March 12, 2012*

**physics**

A two staged rocket moves in space at a constant velocity of 4900m/s. The two stages are then separated by a small explosive charge between them. Immediately after the explosion the velocity of the 1200kg upper stage is 5700m/s in the same direction as before the explosion. ...

*March 12, 2012*

**physics**

In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of 4.5m/s, grabs him. The tackler holds onto the receiver, and and the two move off together with a velocity of 2.6m/s. The mass of the tackler is ...

*March 12, 2012*

**physics**

Am 85kg jogger is heading due east at a speed of 2.0m/s. A 55kg jogger is heading 32 degrees north of east at a speed of 3.0m/s. Find the magnitude and direction of the sum of the momenta of the two joggers.

*March 12, 2012*

**physics**

A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0e6N and a direction opposite to the probe's motion. It fires for a ...

*March 12, 2012*

**Physics**

A space probe is traveling in outer space with a momentum that has a magnitude of 7.5e7 Kg*m/s. A retrorocket is fired to slow down the probe. It applies a force to the probe that has a magnitude of 2.0e6N and a direction opposite to the probe's motion. It fires for a ...

*March 11, 2012*

**physics**

An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.11 x 105 m/s to a final velocity of 1.67 x 106 m/s while traveling a distance of 0.0654 m. The ...

*March 11, 2012*

**physics**

A 190-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 32.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.876, and the log has an acceleration of 0....

*March 11, 2012*

**Physics**

During a storm, a tree limb breaks off and comes to rest across a barbed wire fence at a point that is not in the middle between two fence posts. The limb exerts a downward force of 283 N on the wire. The left section of the wire makes an angle of 11.8° relative to the ...

*March 11, 2012*

**physics**

Thank you

*March 11, 2012*

**physics**

Traveling at a speed of 18.5 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.690. What is the speed of the automobile after 1.41 s have elapsed? Ignore the effects of ...

*March 11, 2012*

**physics**

An electron is a subatomic particle (m = 9.11 x10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +5.11 x 105 m/s to a final velocity of 1.67 x 106 m/s while traveling a distance of 0.0654 m. The ...

*March 10, 2012*

**math**

find to the nearest minute, all positive values in the interval 0° ≤ θ < 180° that satisfy the equation 2 tan^2 θ - tan θ = 3

*March 7, 2012*

**math**

find to the nearest minute, all positive values in the interval 0° ≤ θ < 180° that satisfy the equation 2 tan^2 θ - tan θ = 3

*March 7, 2012*

**physics**

A small rocket is fired directly upwards with an initial velocity of 100m/s, How many seconds will it take to reach its maximum height?

*February 29, 2012*

**Physics**

Under what conditions would an applied force increase the Kinetic energy of an object?

*February 26, 2012*

**Physics**

A 1.00e2kg crate is being pushed across a horizontal floor by a force of P that makes an angle of 30.0 degrees below the horizontal. The coefficient of Kinetic Friction is 0.200. What should be the magnitude of P, So that the network done by it and the Kinetic Frictional Force...

*February 26, 2012*