Determine the amount of work that must be done to accelerate a 820kg car from 10m/s to 30m/s
Posted 5 years ago by Em2019 in Physics 20 | 3 answers
#acceleration #work and energy
An electrochemical change occurs when a strip of nickel is immersed in an acidified solution that contains dichromate ions.
The colour change that occurs as the reaction above proceeds is:
Posted 5 years ago by jaejae1717 in Chemistry 30 | 1 answers
#chemistry 30
several methods of determining the roots of a quadratic equation were discussed in lesson 2.3. select one of the methods to determine the roots of the equation 5x^2+2x+15=4x^2+13x-15. verify the roots.
Posted 5 years ago by npaulovich in Math 20-2 | 4 answers
#quadratic equations #quadratic functions
the solution to nx^2+PX+Q=0 are 4 and -2/5. what information does this tell you about the graph of f(x)=nx^2+px+q?
Posted 5 years ago by npaulovich in Math 20-2 | 2 answers
#quadratic equations #quadratic functions
tips on which vocabulary to use while analysing a source?
Posted 5 years ago by in Social Studies 10-1 | 3 answers
#social 10 #source analysis #vocabulary
1.harlequin duck
2.mercury
3.dissolved oxygen levels
Biotic factor limiting walleye population
Abiotic factor limiting walleye population
Abiotic factor limiting bull trot swamping
Abiotic factor limiting gold eye population
Biotic factor limiting white fish population
Posted 5 years ago by emily in Biology 20 | 1 answers
#ecocsystems and population change
The average current produced by the cell in figure 2, when it operates for 30.0 min and consumes 1.00 g of the anode is
Posted 5 years ago by noure2 in Chemistry 30 | 1 answers
#chemistry 30 #electrochemistry
Explain how liberal ideology about land resources exploitation are being called into question by alternative way of thinking, such as an environmentalism?
Posted 5 years ago by Paule in Social Studies 30-2 | 1 answers
#ideologies
Posted 5 years ago by chan in Biology 20 | 1 answers
#ecocsystems and population change
It has been determined that fluoride can prevent the decay of tooth enamel. Historically, tin(II) fluoride was added to toothpaste to help combat tooth decay. Titration analysis was used to determine the concentration of tin(II) fluoride in a NMmple of toothpaste. A 10.0 mL sample of tin(II) fluoride solution was acidified and titrated with 0.0100 mol/L potassium dichromate solution as represented by the following equation.
3Sn2+(aq)+Cr2O2−7(aq)+14H+(aq)→3Sn4+(aq)+2Cr3+(aq)+7H2O(l)
Trial I II III IV Final Volume (mL) 9.39 16.93 23.61 30.32 Initial Volume (mL) 2.85 9.39 16.93 23.61 Volume Used (mL)
a.The moles of Cr2O72-(aq) that reacted, expressed in scientific notation, is a.bc x 10-dmol. The values of a, b, c and d are
b.The concentration of Sn2+(aq), expressed in scientific notation, is a.bc x 10-d mol/L. The values of a, b, c and d are
Posted 5 years ago by noure2 in Chemistry 30 | 1 answers
#chemistry 30