Reference no: EM132599067

Answer all questions in this section. To get full credit for a question you must show your work and explain your reasoning in detail.

[1] A 50 newton horizontal force pushes a 10 kg mass sitting on a horizontal surface. Additionally, the horizontal surface exerts a 25 newton frictional force on the mass. What is the acceleration of the mass?

[2] A water wave oscillates up and down three times each second. The distance between wave crests is 2 m.

a. What is its frequency?

b. What is its wavelength?

c. What is the speed of this wave?

[3] An isotope of the element Thallium, Tl-206, undergoes beta decay with a half life of 3.1 minutes. Assume you begin with 1.0 grams of the thallium isotope, what mass of the isotope will be left after 9.3 minutes have elapsed?

[4] Assume that a 6 volt energy source is in a circuit that has a resistance of 10 ohms. Determine the current and power. Provide numerical values and units.

[5] A solution has a hydronium-ion concentration of 1.0 x 10-5 mol per liter. What is the pH of this solution? Is this solution acidic or basic? What is the hydroxide-ion concentration of this solution?

[6] Balance the following chemical equations.

a. Ni + O2 ® Ni2O3

b. F2 + HBr ® Br2 + HF