1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Snezhnost [94]
3 years ago
6

A deer is running across a meadow at a speed of 15 m/s. Katie is riding in a car that is traveling at 25 m/s in the opposite dir

ection as
the deer. To Katie, the deer appears to be moving at a speed of 35 m/s.
Joan is standing still beside the meadow. To Joan, the deer appears to be moving at a speed of 15 ms.
Why do Katie and Joan believe the deer is traveling at different speeds?
A. Joan is not able to see clearly.
B. They are not the same height and weight.
C. They have different frames of reference.
D.Katie's car is going too fast.
Chemistry
1 answer:
Dmitrij [34]3 years ago
5 0

Answer:

D

Explanation:

You might be interested in
Jean's mother lit a candle and placed it on his birthday cake. As they sang happy birthday, the wick burned, the wax
Greeley [361]

Answer:

The wick burning

Explanation:

7 0
2 years ago
Someone please help me
Fudgin [204]
The answer is ultraviolet
6 0
2 years ago
La Niña generally causes _____ in the Americas and _____ in Australia and Asia.
Kitty [74]
The correct answer is less wind and more wind. Good luck :)

5 0
3 years ago
How many hours are in 7 months? (assume 30 days in a month)
Komok [63]

Answer:

there is about 5110.01 hours in 7 months

Explanation:

because no 7 months in a row have the same amount of months so about 730.001428571 days in 7 months times the number of months. Hope this helps!

3 0
3 years ago
Read 2 more answers
Gastric juice is made up of substances secreted from parietal cells, chief cells, and mucous-secreting cells. The cells secrete
neonofarm [45]

Answer:

The amount of energy required to transport hydrogen ions from a cell into the stomach is 37.26KJ/mol.

Explanation:

The free change for the process can be written in terms of its equilibrium constant as:

ΔG° = -RTInK_(eq)

where:

R= universal gas constant

T= temperature

K_eq= equilibrum constant for the process

Similarly, free energy change and cell potentia; are related to each other as follows;

ΔG= -nFE°

from above;

F = faraday's constant

n = number of electrons exchanged in the process; and  

E = standard cell potential

∴ The amount of energy required for transport of hydrogen ions from a cell into stomach lumen can be calculated as:

ΔG° = -RTInK_(eq)

where;

[texK_eq[/tex]=\frac{[H^+]_(cell)}{[H^+(stomach lumen)]}

For transport of ions to an internal pH of 7.4, the transport taking place can be given as:

H^+_{inside} ⇒ H^+_{outside}

Equilibrum constant for the transport is given as:

K_{eq}=\frac{[H^+]_{outside}}{[H^+]_{inside}}

=\frac{[H^+]_{cell}}{[H^+]_{stomach lumen}}

[H^+]_{cell}= 10⁻⁷⁴

=3.98 * 10⁻⁸M

[H^+]_{stomach lumen} = 10⁻²¹

=7.94 * 10⁻³M

Hence;

K_{eq}=\frac{[H^+]_{cell}}{[H^+]_{stomachlumen}}

=\frac{3.98*10^{-8}}{7.94*10{-3}}

= 5.012 × 10⁻⁶

Furthermore, free energy change for this reaction is related to the equilibrium concentration given as:

ΔG° = -RTInK_(eq)

If temperature T= 37° C ; in kelvin

=37° C + 273.15K

=310.15K; and

R-= 8.314 j/mol/k

substituting the values into the equation we have;

ΔG₁ = -(8.314J/mol/K)(310.15)TIn(5.0126*10^{-6})

= 31467.93Jmol⁻¹

≅ 31.47KJmol⁻¹

If the potential difference across the cell membrane= 60.0mV.

Energy required to cross the cell membrane will be:

ΔG₂ = -nFE°_{membrane}

ΔG₂ = -(1 mol)(96.5KJ/mol/V)(60*10^{-3})

= 5.79KJ

Therefore, for one mole of electron transfer across the membrane; the energy required is 5.79KJmol⁻¹

Now, we  can calculate the total amount of energyy required to transport H⁺ ions across the membrane:

Δ G_{total} = G_{1}+G_{2}

= (31.47+5.79) KJmol⁻¹

= 37.26KJmol⁻¹

We can therefore conclude that;

   The amount of energy required to transport ions from cell to stomach lumen is 37.26KJmol⁻¹

5 0
3 years ago
Other questions:
  • Three of the primary components of air are
    11·1 answer
  • If you need to measure the mass of a greeting card you are sending to a friend through the mail, what unit of measurement would
    11·1 answer
  • The activation energy for a reaction is 84.0kJ/mol. Addition of a catalyst lowers the activation energy by 23.0 kJ/mol, while le
    13·1 answer
  • Write the mechanism of the reaction of methyl benzoate to form methyl 2-nitrobenzoate.
    15·2 answers
  • Look at the four images<br>Which image represents a tropical rainy climate?<br>1 2 3 4​
    15·2 answers
  • ................................................................
    5·2 answers
  • Name the following Compound: CrF2
    7·1 answer
  • In the early 1600's, Galileo used a telescope to investigate dark features on the Sun's surface and used them to calculate the r
    6·1 answer
  • Somebody please helppppppppppp
    5·2 answers
  • Question 7
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!