FAYNUS

An electron (|q| = 1.6*10-19 C, m = 9.1*10-31 kg) is suspended at rest in a uniform electric field of magnitude E. Its weight mg (g = 9.8 m/s2) near the Earth’s surface is exactly canceled by the electrostatic force. Determine the magnitude of the electric field E in units of pN/C. (1 pN = 10-12 N)

How is it that (1+i)(6-2i)-(-i)(4) = 8 + 8i

Can someone walk me through the steps? Thanks!

You want to go fishing in an ocean bay. Your boat does not have a really good anchor to secure it to one spot. When should you go finishing?

a. at high tide only

b. at low tide only

c. when the tide comes in

d. when the tide goes out

A person walks with constant speed 2 m/s east for 30 seconds, then turns around and walks with constant speed 2 m/s west for 10 seconds. What is his average acceleration in those 40 sec?

I know the answer is 0.1 m/s^2 west but I don't understand why? Any help would be appreciated!

How does Mill defend the Harm Principle?

Compare the energy yield (moles ATP) of the aerobic metabolism of glucose (to CO2) to anaerobic metabolism (with the final product as ethanol). Write the stoichiometric equation for each process.

Any help would be appreciated! Thanks!

Which of theintermediates in the citric acid cycle are the immediate precursors for the biosynthesis of amino acids?

A) Isocitrate

B) α-ketoglutarate

C) Succinate

D) Oxaloacetate

E) b and d

Which of the reactions in glycolysis are also used in gluconeogenesis?

A. PFK 1

B. Phosphoglucomutase

C. Enolase

D. Phosphoglycerate mutase

E. b, c and d

Have: 90mg/ml of Ampicillin, LB broth

Want: 100ml volumes of 45μg/ml of LB/Amp broth

How much Amp to add?

Can someone walk me through the steps to find this answer?

Thanks!

The primary coil of a transformer makes 240 turns around the iron core, and the secondary coil of that transformer makes 80 turns. If the primary voltage is 120V and the primary current is 3A, what is the current passing through the secondary coil of the transformer (in A)?

Imagine assembling four equal charges, one at a time, and putting them at the corners of a square. Find the total work done by an external force to assemble these if the charges are each 5 microCoulomb and the square has 25 cm sides.

The inner and outer surfaces of a cell membrane carry a negative and positive charge respectively. Because of these charges, a potential difference of about 70 mV exists across the membrane. The thickness of the membrane is 8 nm. If the membrane were empty (filled with air), what would the magnitude of the electric field inside the membrane in units of 106 N/C = 106 V/m?

A) steric hindrance prevents some bond angles from occuring

B) charge interaction prevents some bond angles from occuring

C) the aqueous solvent prevents some bond angles from occuring

D) proline's structure does not accomodate all bond angles

a. the bond between the alpha carbon and the alpha carboxy

b. the bond between the carbonyl carbon of one amino acid and the alpha amino group of the adjacent amino acid

c. the bond between the alpha amino group and the alpha carbon

d. the bond between the R-group and the alpha amino group

A 0.500 kg mass is attached to a spring of constant 150 N/m. A driving force F(t) = (12.0 N)cos(ωt) is applied to the mass, and the damping coefficient b is 6.00 Ns/m. What is the amplitude of the steady-state motion if ω is equal to half of the natural frequency ω0 of the system?

Any help would be appreciated. (-:

You are at a coffee shop with a close friend and the talk turns towards masses bouncing vertically on springs. Your friend makes the statement that “There is one unique point in time when the speed of the object is maximum, and that is when the acceleration is maximum too.

A. Your friend's statement is correct.

B. Your friend's statement is incorrect, because the acceleration is zero when the speed is maximum.

C. Your friend's statement is incorrect, because the acceleration is constant

A 0.5 kg mass oscillates about the equilibrium position on a vertical spring with spring constant 10 N/m. Where is its equilibrium position measured from the unstretched spring position (without the hanging mass)? An explanation would be appreciated. Thanks (-:

A particles position is given by x = (5 + 40t - 8t^2)m, where t is the time in seconds. Find ax at t = 2s.

An explanation would be appreciated. Thanks (-:

A ball is thrown upward at 15m/s what will velocity be at 10 meters. Gravity= 9.8(m/s)/s

An explanation of your reasoning would be appreciate. Thanks! (-: