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Morgarella [4.7K]
3 years ago
8

Which of the following best characterizes the free energy change ΔG for an endothermic reaction under physiological conditions?A

. The sign of ΔG is positive
B. The sign of ΔG is zero
C. The sign of ΔG is negative
D. The sign of ΔG cannot be determined without more information
Physics
1 answer:
mote1985 [20]3 years ago
6 0

Answer:

D

Explanation:

Whether endothermic or exothermic, for a reaction to be spontaneous, ∆G must be negative.

∆G=∆H-T∆S.

The values of temperature and entropy change can be determined when the values of enthalpy, entropy and temperature are known. When ∆G is zero, the reaction has attained equilibrium.

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A car moved 60 meters west in 2 hours. What is its average velocity?
Fofino [41]

Explanation: Velocity is the displacement of an object during a specific unit of time. Two measurements are needed to determine velocity. Displacement and time. Displacement includes a direction, so velocity also includes a direction. Speed with direction. Velocity can be an average velocity or an instantaneous velocity. Units for velocity are the same as for speed: m/s, km/h, and mph. Delta x(Δx) is the symbol used for displacement. Delta (Δ) means to "change in." Δx means to "change in position." Δx is calculated by final position minus initial position. Velocity formula: → v=Δx/t as a fraction.

v=Δx/t

v=\frac{xf-xi}{t}= \frac{60m}{2}=30m

<em><u>Final answer is 30.</u></em>

Hope this helps!

Thanks!

Have a great day!

-Charlie

5 0
3 years ago
Mechanical energy is the difference between the kinetic and potential energies of an object. True or False?
Fofino [41]

Answer:

False

Explanation:

Its the sum of those not the difference between them

4 0
3 years ago
Read 2 more answers
A battery can provide a current of 1.80 A at 2.60 V for 6.00 hr. How much energy (in kJ) is produced?A battery can provide a cur
love history [14]

Answer:

The energy which is produced by a battery is 101.1 kJ.

Explanation:

The expression for the energy in terms of voltage, current and time is as follows;

E=VIt

Here, V is the voltage, I is the current and t is the time.

It is given in the problem that a battery can provide a current of 1.80 A at 2.60 V for 6.00 hr.

Calculate the energy of the battery.

E=VIt

Convert time from hour int seconds.

t=6 hr

t=(6)(60)(60)

t=21600 s

Put I= 1.80 A, V= 2.60 V and t= 21600 s in the expression of energy.

E=(2.60)(1.80)(21600)

E= 101.1 kJ

Therefore, the energy which is produced by a battery is 101.1 kJ.

4 0
3 years ago
German physicist Werner Heisenberg related the uncertainty of an object's position ( Δ x ) to the uncertainty in its velocity (
timama [110]

According to the information given, the Heisenberg uncertainty principle would be given by the relationship

\Delta x \Delta v \geq \frac{h}{4\pi m}

Here,

h = Planck's constant

\Delta v = Uncertainty in velocity of object

\Delta x = Uncertainty in position of object

m = Mass of object

Rearranging to find the position

\Delta x \geq \frac{h}{4\pi m\Delta v}

Replacing with our values we have,

\Delta x \geq \frac{6.625*10^{-34}m^2\cdot kg/s}{4\pi (9.1*10^{-31}kg)(0.01*10^6m/s)}

\Delta x \geq 5.79*10^{-9}m

Therefore the uncertainty in position of electron is 5.79*10^{-9}m

8 0
3 years ago
Oil flows upward in the wick of a lantern because of liquid property called
nordsb [41]
Capillarity "Capillarity causes the part of the surface of a liquid in contact with a solid, to be either elevated above (e.g. water), or depressed below (e.g. mercury), the rest of the surface. This trait is named for the behaviour of liquids in capillary tubes placed perpendicular to the surface. The forces operating within capillarity are cohesion, adhesion, and surface tension."



6 0
3 years ago
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