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telo118 [61]
3 years ago
15

How long will it take you to walk 12 km if your speed is 2.5 km/hr?

Chemistry
2 answers:
Alik [6]3 years ago
7 0

Explanation:  Walking for 30 minutes covers a distance of 2.0 to 2.5 km and burns about 125 calories

Alex3 years ago
4 0

Answer:

4.8 hours

Explanation:

12÷2.5= 4.8 hours

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1. List three factors that can cause a chemical reaction to proceed faster.
Luba_88 [7]

Explanation:

1. The three factors are;

- Increasing the surface area of the reactants

- Using a catalyst

- Increasing temperature

2. Raising the temperature of a reaction mixture is the same as increasing the kinetic energy of the reacting molecules.

3. This reaction is an exothermic reaction. In exothermic reaction, the temperature of the system (mixture) decreases while that of the surroundings increases.

4. Reactions that releases energy to the surroundings are exothermic reactions.

5. All the options is an example of exothermic process because heat is being removed from the system except;

B. Evaporation of water - This is because it must absorb heat from the surroundings making it endothermic.

6 0
3 years ago
THIS IS SCIENCE What the metric base unit for length.
kozerog [31]

Length: The most common units that we use to measure length in the metric system are the millimeter, centimeter, meter, and kilometer. The millimeter is the smallest commonly used unit in the metric system

Mass: Kilogram.

Liquid volume: The basis of fluid volume units for the metric system is the liter. A liter is about the same as one quart.

  • The independent variable in an experiment is the variable whose value the scientist systematically changes in order to see what effect the changes have.
  • A dependent variable is what the experimenter observes to find the effect of systematically varying the independent variable.
  • Experimental constants are values that do not change either during or between experiments.
  • A controlled variable is a variable that could change, but that the experimenter intentionally keeps constant in order to more clearly isolate the relationship between the independent variable and the dependent variable.

(And psa. don't lie to people about the points earned!)

7 0
3 years ago
What does the questions “how much?” and “how many?” have in common?
Pepsi [2]
They both ask for an amount of something
5 0
4 years ago
What explanation can you give for why the sodium-potassium pump does not run out of ions to move in or out of the cell
rewona [7]

The sodium-potassium pump does not run out of ions since ion exchange is essential for the action potential to take place and to maintain homeostasis.

The cell has variable concentrations of different substances compared to the environment that surrounds it, with significant differences with sodium and potassium.

  • The main function of the sodium-potassium pump is to maintain homeostasis of the intracellular medium, controlling the concentrations of these two ions.

  • In order to carry out the adequate exchange of sodium and potassium ions in the extra and intracellular medium, the cells need an active transport process that is carried out thanks to the sodium potassium pump.

  • This process is needed for the maintenance and functioning of cells, and it is essential for the action potential to be executed, necessary for the transmission of electrical impulses from neuron to neuron.

Therefore, we can conclude that the sodium potassium pump produces an exchange of potassium ions for sodium ions which keeps the cellular system functioning properly.

Learn more here: brainly.com/question/24336764

6 0
3 years ago
If the coefficients of the reaction are altered, they change:
aliya0001 [1]

Answer:

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Explanation:

Have a great day

8 0
3 years ago
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