Bret

Most popular questions and responses by Bret
1. geometry

given: segment HI congruent to segment GJ, segment HI parallel to segment GJ prove: triangle GJH congruent to triangle IHJ

2. Physic

A 89.0 kg person stands on one leg and 90% of the weight is supported by the upper leg connecting the knee and hip joint-the femur. Assuming the femur is 0.640 m long and has a radius of 1.90 cm, by how much is the bone compressed?

3. Physics

How much power does a water pump exert lifting 30 kg of water at a constant velocity 20 m each second

4. chemistry

what is the oxidation number for nitrogen in the following? NH3 NO2 1- N2 NO2Cl N2H4 We will be happy to critique your thinking or work. I don't even have a clue as to how to work it out.

5. Physics

An athlete whirls a 7.36 kg hammer tied to the end of a 1.5 m chain in a horizontal circle. The hammer moves at the rate of 1.07 rev/s. What is the centripetal acceleration of the hammer? Assume his arm length is included in the length given for the chain.

(5y^4-23y^3+24y^2-7)/(y-3)

7. Enthalpy (chemistry 105)

23.0mL of water density of water is 1.00 g/mL 1g = 1ml 23g of water Cs of water 4.18 J/(gC) moles= 2.40g/72.0(g/mol)= .033 mass = 23g+2.4g = 25.4g Ti= 14.5 C Tf= 25.0 C Calculate the enthalpy change, ΔH, for this reaction per mole of X. I'm getting -33.4

if m

9. Physic

The spout heights in the container in the figure are 15 cm, 30 cm, 45 cm, and 60 cm. The water level is maintained at a 68 cm height by an outside supply. What is the speed of the water out of the 15 cm high hole? What is the speed of the water out of the

10. math

what is another way to equal 40 and i already have 10•4•1, 20•2•1,5•4•3,40•1•1,10•2•2?

11. math

find the unit rate and use it to write an equation relating the two quantities? 62 dollars to rent 14 video games 62/14?

what is

13. algebra

what two numbers add up to 4 and multiply to 6?

14. math

consider a state lottery that has a weekly television show. on this show, a contestant receives the opportunity to win \$1 million dollars. the contestant picks from 4 hidden windows. behind each window is one of the following: \$150,000, \$200,000, \$1

15. chemistry

Posted by Bret on Friday, March 16, 2007 at 10:44am. what is the oxidation number for nitrogen in the following? NH3 NO2 1- N2 NO2Cl N2H4 For Further Reading chemistry - bobpursley, Friday, March 16, 2007 at 11:26am We will be happy to critique your

thanks

posted on January 21, 2018
2. Enthalpy (chemistry 105)

Wow Pearson was messed up I was right the whole time. Thank you for replying, but your advice was missing some details. The mass of the unknown (like in my mole calculation) has to be included in the mass with the water to get the right amount of joules.

posted on October 29, 2017
3. math

10%?

posted on August 31, 2016
4. algebra

alright, thank you!!

posted on May 4, 2016
5. Science 10

mgh=1/2mv^2 gh = 1/2v^2 9.81 x h = (0.5)(15.0 m/s)^2 9.81/9.81 x h = 56.25/9.81 h = 5.7

posted on November 25, 2015
6. Math

30%, .4, 1/2

posted on February 19, 2015