Biology
Chemistry
Physics
Math
100
The majority of cell processes are controlled by the
What is the nucleolus
100
The oxidation number of As in H4As2O7 is
What is +5
100
An archer pulls back 0.75 m on a bow which has a stiffness of 200 N/m. The arrow weighs 50 g. What is the velocity of the arrow immediately after release?
What is v = 47.4 m/s
100
How many solutions does |x+3|=1.5|x-2| have?
What is 2
200
The products of mitochondria include ATP and
What is water
200
Consider the equilibrium shown. When the temperature is increased, the equilibrium shifts to the N2(g) + O2(g) +energy --><--- 2NO(g)
What is right and Keq increases.
200
A 75 kg person rides a Ferris wheel which is rotating uniformly. The centripetal force acting on the person is 45 N. What force does the seat exert on the rider at the top and the bottom of the ride?
What is 690 N (top); 780 N (bottom)
200
Determine the exact value of tan(sin-1(2/x)), x>2.
What is 2/((x^2)-4)^1/2
300
A carcinogen is a substance that
What is transforms a proto-oncogene.
300
A substance that increases the rate of a chemical reaction and may be recovered unchanged at the end of the reaction is a(n)
What is a catalyst
300
A 1 500 kg car travelling at 25 m/s collides with a 2 500 kg van stopped at a traffic light. As a result of the collision the two vehicles become entangled. With what initial speed will the entangled mass move off, and is the collision elastic or inelastic?
What is Speed: 9.4 m/s; inelastic
300
Two boats on opposite banks of a river start moving towards each other. They first pass each other 1400 meters from one bank. They each continue to the opposite bank, immediately turn around and start back to the other bank. When they pass each other a second time, they are 600 meters from the other bank. We assume that each boat travels at a constant speed all along the journey. Find the width of the river?
What is X= 3600 meters S1*t1 = 1400 : S1 speed of boat 1, t1 : time to do 1400 meters(boat 1) 1400 + S2*t1 = X : S2 speed of boat 2 S1*t2 = X + 600 : t2 time to do X + 600 (boat 2) S2*t2 = 2X - 600 S1 = 1400/t1 S2 = (X-1400)/t1 T = t2/t1 : definition substitute S1, S2 and t2/t1 using the above expressions in equations 3 and 4 to obtain 1400*T = X + 600 X*T - 1400*T = 2X - 600 : 2 equations 2 unknowns Eliminate T and solve for X to obtain X = 3600 meters.
400
The secretion of noradrenalin into the synaptic cleft occurs by which of the following processes?
What is exocytosis
400
Calculate the [H3O+] in a 0.010 M solution of Sr(OH)2.
What is 5.0 x 10-13 M
400
A 12.0 kg shopping cart rolls due south at 1.50 m/s . After striking the bumper of a car, it travels at 0.80 m/s, 30° E of S. What is the magnitude of the change in momentum sustained by the shopping cart?
What is 11 kgm/s
400
An examination consists of three parts. In part A, a student must answer 2 of 3 questions. In part B, a student must answer 6 of 8 questions and in part C, a student must answer all questions. How many choices of questions does the student have?
What is 3C2 * 8C6 * 1 = 84 : Use of fundamental theorem of counting
500
The secretion of noradrenalin into the synaptic cleft occurs by which of the following processes?
What is exocytosis
500
A molten binary salt, ZnCl2, undergoes electrolysis. The cathode reaction is
What is Zn2+ + 2e- --> Zn
500
When a moving car encounters a patch of ice the brakes are applied. Why is it desirable to keep the wheels rolling on the ice without locking up?
What is Static friction is greater than kinetic friction.
500
When divided by x - 1, the polynomial P(x) = x5 + 2x3 +Ax + B, where A and B are constants, the remainder is equal to 2. When P(x) is divided by x + 3, the remainder is equal -314. Find A and B.
What is P(1) = 15 + 2(13) +A*(1) + B = 2 : remainder theorem P(-3) = (-3)5 + 2(-3)3 +A*(-3) + B = -314 A = 4 and B = -5 : solve the above systems of equations.
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