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Posts by BT

Total # Posts: 30

physics
A therapist is helping a patient with stretching exercises. She pushes on the patient’s foot with an average force of 200 N. The patient resists the force and moves the foot 20 cm toward the therapist. How much work did the therapist do on the patient’s foot during ...

Physics
Quentin is lifting a 10 kg dumbbell by pulling upward on it with a 108.1 N force. What is the acceleration of the dumbbell as a result of this force?

Physics
A boxer is punching the heavy bag. The time of impact of the glove with the bag is 0.10 s. The mass of the glove and his hand is 3 kg. The velocity of the glove just before impact is 25 m/s. What is the average impact force exerted on the glove?

Physics
A sled has 300 kg m/s of momentum at point A. At point B the momentum is 375 kg m/s after 2 sec. What force was applied to the sled?

Physics
A 75 kg individual runs a 5 m/s and jumps onto a stationary 40 kg wagon. What is the speed of the wagon and individual?

Physics
Emma is working in a shoe test lab measuring the coefficient of friction for tennis shoes on a variety of surfaces. The shoes are pushed against the surface with a force of 400 N, and a sample of the surface material is then pulled out from under the shoe by a machine. The ...

Physics
Emma is working in a shoe test lab measuring the coefficient of friction for tennis shoes on a variety of surfaces. The shoes are pushed against the surface with a force of 400 N, and a sample of the surface material is then pulled out from under the shoe by a machine. The ...

Math Help Please
List a repeating decimal that is equal to an integer. I have 0.999 because if you divide it by 9's its equal to 1, 999/999=1 Also I thought of -0.999 that is equal to -1 But I can't think of another one can you please help ? Please

Algebra2
A surveyor stands 150ft from the base of a tree and measures the angle of elevation to be 46.2. His eye level is 6feet above the ground. What is the height of the tree to the nearest foot?

Math
A football is thrown by a quarterback, the footballs height in feet h with respect to time in seconds T can be modeled using your quadratic function. You want to know when the football will be 7.5ft in the air because that's about the right height that your favorite ...

Algebra 2
A football is thrown by a quarterback, the footballs height in feet h with respect to time in seconds T can be modeled using your quadratic function. You want to know when the football will be 7.5ft in the air because that's about the right height that your favorite ...

Algebra2
I need help

Algebra2
I still need more help i need to explain it in a paragraph on how i got the anser

Algebra2
A football is thrown by a quarterback, the footballs height in feet will be 7.5 ft in the air because that's about the right height that your favorite football player would catch the ball. Also you want to know if the most despised cornerback in the league will be able to ...

math
three numbers are in the ratio 6:3:1, and the sum of these numbers is 420. If the first number is reduced by 50%, the second number is increased by 42, and the sum of the numbers remains the same, find the resulting ratio of the numbers.

chem
how many moles of calcium and chloride ions are there in 1.00mol of cacl2

chemistry
Which ions are spectacular ions in this reaction? What is a net ionic equation for this reaction?

chemistry
What is a complete ionic equation for the reaction between Pb(NO3)2 and NaI?

chemistry
Correction : Pb(NO3)2 2.0mL

chemistry
What is the mole ratio of the reactants in a tube containing: Pb(NO3) 22.0mL 0.5 mol NaI 16.0mL 0.5 mol

chemistry
Pb(NO3)2 6.0mL 0.5 mol NaI 12.0mL 0.5 mol What is the mole ratio between Pb(NO3)2 and NaI?

chemistry
DATA TABLE 2: SPOT TESTS OF SUPERNATANT SAMPLES FROM REACTION TUBES Substance Added Tube 1 Ppt.? Tube 2 Ppt.? Tube 3 Ppt.? Tube 4 Ppt.? Tube 5 Ppt.? Tube 6 Ppt.? Pb(NO3)2 yes yes no no no no NaI no no no yes yes yes reagent present in excess How do I identify whether or not ...

chemistry
a. What is the relative height of each of the precipitates? Assume that the tube with the least amount of precipitate has a relative height of 1. HINT: Divide each height by the smallest one. b. What is the relative number of theoretical moles of product in each tube? Assume ...

chemistry
DATA TABLE 1: DATA FOR REACTION MIXTURES Tube Number Pb(NO3)2 NaI Height Ppt. (cm) Maximum Theoretical Yield Ppt. (mol) (mL) (mol) (mL) (mol) 1 2.0 0.5 16.0 0.5 0.6 2 4.0 0.5 14.0 0.5 1.3 3 6.0 0.5 12.0 0.5 1.8 4 8.0 0.5 10.0 0.5 1.5 5 10.0 0.5 8.0 0.5 1.7 6 12.0 0.5 6.0 0.5 0...

trig
What is the projection of (2,6) onto (-1,5)?

trig
Given the polar coordinates of a point, how do I find the rectangular coordinates? (2, 3pi/4) (-4, 7pi/6) (2/3, -2pi/3) Given the rectangular coordinates of a point, how do I find the polar coordinates? (4, 0) (3, 4) (2, -2)

trig
I don't understand the question... (This homework question was removed due to a copyright claim submitted by k12.com.)

chemistry
A 0.500 L solution of 7.50 M hydrochloric acid is used to neutralize a 250.0 g sample of calcium hydroxide. Calcium chloride – a chemical used to control highway dust, strengthen concrete mixes, and add flavor to foods – is produced by the reaction. 2 HCl + Ca(OH)2...

Physics
A turtle is moving with a constant acceleration along a straight ditch. He starts his stopwatch as he passes a fence post and notes that it takes him 10s to reach a pine tree 10 m farther along the ditch., As he passes the pine tree, his speed is 1.2m/s. How far was he from ...

science
induced emf in secondary= (number of turns in secondary/ number of turns in promary)* applied emf in primary. this can be changes to solve for applied emf in primary instead.

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