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A 23 kg object is pushed up an inclined plane with angle of inclination of 14
0.The coefficient of kinetic friction between the object and the incline is 0.30. Determine the acceleration of the object if it is pushed by a 250 N force that is acting parallel to the incline.
Determine Which of these function are bijection from the set of real number to itself
1- f(x)=-3x+4
2- f(x)=-3x2+7
3- f(x)=(x+1)/(x+2)
The decomposition of N2O5 is an important process in tropospheric chemistry. The half-life
for the first order decomposition of this compound is 2.05X104 s. How long will it take for a
sample of N2O5 to decay to 60% of its initial value?
For the following reaction, 108 grams of silver nitrate are allowed to react with 23.6 grams of copper .
silver nitrate(aq) + copper(s) copper(II) nitrate(aq) + silver(s)
What is the maximum amount of copper(II) nitrate that can be formed? grams
What is the FORMULA for the limiting reagent?
What amount of the excess reagent remains after the reaction is complete? grams
calculate the time required to deposit 56g of silver from a silver nitrate(AgNO3)solution using a current of 4.5amper
For the following reaction, 4.41 grams of hydrogen gas are allowed to react with 39.8 grams of iodine .
hydrogen(g) + iodine(s) hydrogen iodide(g)
What is the maximum mass of hydrogen iodide that can be formed? grams
What is the FORMULA for the limiting reagent?
What mass of the excess reagent remains after the reaction is complete? grams
In a shipment of 10 computers, 3 are defective. Three computers are randomly selected and tested. What is the probability that all three are defective if the first and second ones are not replaced after being tested?
Written Assignment unit 7
Complete the following questions utilizing the concepts introduced in this unit.
1. Find the length of an arc in a circle of radius 10 centimetres subtended by the central angle of 50°. Show your work.
2. Graph f(x) = x Sin x on [-4π, 4π] and verbalize how the graph varies from the graphs of f(x) + or - x.
Graph f(x) =Sin x / x on the window [−5π, 5π] and describe freely what the graph shows. You can use www.desmos.com/calculator to obtain the graphs.
3. A 23-ft ladder leans against a building so that the angle between the ground and the ladder is 80°. How high does the ladder reach up the side of the building? Show the steps of your reasoning.
A mixture of Al and Fe weighing 0.2000 g is treated with excess HCI solutions. Each metal reacts separately with the acid, resulting in the production of hydrogen gas H2, and a chloride salt. After treatment, a total volume of 200mL of the evolved gas was collected at 20 °C and 850 torr. Calculate for the mass percentage of Al in the sample.
calculate the new freezing point of water when 72.0 g of BaCl2 are added to 0.175 kg of water
