chelsie
Popular questions and responses by chelsie
algerba
What is the value of the discriminant, b2 − 4ac, for the quadratic equation 0 = −2x2 − 3x + 8, and what does it mean about the number of real solutions the equation has? What are the solutions to the quadratic equation 4(x + 2)2 = 36 Mischa wrote the
asked on May 25, 2016 
chemistry
Predict how the entropy of the substance is affected in each of the processes. A. H2O(l,300K)⟶H2O(s,273K) B. O2(g,300K)⟶O2(g,800K) C. Ar(l)⟶Ar(g)
asked on April 29, 2020 
physics
player kicks football from ground level with velocity of32 m/s at an angle of 40 degrees above horizontal. What is hang time of football? How far does the ball travel horizontally before hitting the ground? What is the maximum height that the ball reaches?
asked on November 29, 2010 
chemistry
Fluorine gas can react with ammonia gas to produce dinitrogen tetrafluoride gas and hydrogen fluoride gas. This reaction is described by the following balanced equation: 5 F2 (g) + 2 NH3 (g) N2F4 (g) + 6 HF (g) What mass of hydrogen fluoride gas is
asked on June 5, 2018 
Calculus
Find f(x+h) for f(x)= x^2  2x  3
asked on October 11, 2011 
calculus
Let f(x)+10x^2+9x+10. Find f(x+h)f(x).
asked on September 27, 2011 
Math
Given that sin alpha=4/sqrt65, pi/2
asked on June 13, 2011 
science
if a satellite moves in a circular orbit around a planet, the satellite has a constant: momentum velocity OR acceleration
asked on January 25, 2011 
physics
baseball thrown horizontally takes 1.1 seconds to reach the ground. What is the height at which the ball was thrown?
asked on January 11, 2011 
science
Harry walks 1.5 km/h to the mall. Earl walks 2.75 km/h to the mall. What is Earl's relative velocity with respect to Harry?
asked on January 11, 2011 
science
Harry walks 1.5 km/h to the mall. Earl walks 2.75 km/h to the mall. What is Earl's relative velocity with respect to Harry?
asked on January 11, 2011 
science
the separation of the foci of an ellipse that describes a planet's orbit derermines A eccentricity of the orbit B period of the orbit C size of the orbit D all of the above. I think it is A because the closer the foci, the more circular versus elliptical
asked on December 8, 2010 
physics
100 g mass is attached to a string 75 cm long. swings in a horizontal circle. The mass goes around its path once every 0.8. seconds. What is centripetal acceleration of the object? What is the tension in the string?
asked on December 2, 2010 
physics
Find the acceleration down the ramp: skateboarder starts from rest at the top of a 12.5 m slick ramp that makes a 25 degree angle with the horizontal. (coefficient of rolling friction is negligible). Combined mass of skateboarder and skateboard = 75 kg.
asked on November 20, 2010 
12th grade
Suppose an unknown substance has a melting temperature of 1,200 degrees Celsius and a density of 16.7 g/cm3. However, the different individual atoms that make up the element have very different melting temperatures and densities. The unknown substance is
asked on November 19, 2010

chemistry
So for C, dS would increase since gas form is less structured than liquid?
posted on April 29, 2020 
MATH
40 hours * $9.25 = $370 $370 * 4 weeks = $1480 then, calculate and then subtract the involuntary deductions (1480*.0765) + (1480*.12) + (1480*.08) = $409.22 $1480  $409.22 = $1070.78 (your net income for a month) to get the net income of one week, divide
posted on April 4, 2019 
math
I don't know the answer to that
posted on March 15, 2012 
5th grade
i need help obn my homework
posted on August 24, 2011 
5th grade
220 angle duh im 15
posted on October 27, 2010 
algebra
um. i don't know
posted on October 9, 2008 
algebra
the amount of money earned on a job is diretly proportional to the number of hours worked. if $76 is earned for h of work, how much is earned for 34 h of work.
posted on October 9, 2008