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mihalych1998 [28]
3 years ago
15

Select all that apply. Which of the following are characteristics of acids? contain hydroxide ion or produce it in a solution ta

ste sour corrode metals produce hydronium ion in a solution
Physics
1 answer:
julia-pushkina [17]3 years ago
5 0
These are the characteristics that apply:

 - In a solution taste sour: which is consequence of the H+ concentration.

- Corrode metals: the H+ ion reacts with the metal producing a salt and water

-Produce hydronium ion in solution: as per the Bronsted - Lowry definition an acid is a substance that donates a proton, H+. This proton will react with H2O to form H3O+ (hydronium), as per this scheme: 

HA + H2O --> A(-) + H3O(+)
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Thoughts about Genetically Modified Crops
Alex787 [66]
I think that GMOs, also known as genetically modified crops or organisms, can be used in good and bad ways. They can provide crops to survive longer, and produce a bigger portion. However, on the other side of that, it is claimed that it creates a large amount of greenhouse gas emissions, which can turn into climate change.
4 0
3 years ago
Read 2 more answers
. Two astronauts are 1.90 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via elec
melomori [17]

Answer:

d= 1650 km.

Explanation:

  • Assuming that sound waves travel along a straight line at a constant speed of 346 m/s, we can find the time needed for the sound to travel the distance of 1.9 m between the astronauts, just applying the definition of average velocity, as follows:

       t = \frac{\Delta x}{v} =\frac{1.9m}{346m/s} = 5.5 msec  (1)

  • The electromagnetic waves travel in free space at the same speed of light in vacuum ( since light is a electromagnetic wave indeed), i.e., 3*10⁸ m/s.
  • Applying the same formula than in (1) we can solve for the distance d, as follows:

       d = v*t = 3e8 m/s*5.5e-3s = 1650 km (2)

3 0
3 years ago
A 2 kg object is a distance of 10,000,000 m away from the center of Earth, which has a mass of nearly 6×1024 kg. What is the app
Gelneren [198K]

Answer:

4 (N/kg) or B

Explanation:

An application of the equation for Newton’s law of universal gravitation can be used to determine the gravitational field strength at the 2 kg object’s location.

7 0
3 years ago
What are the inner planets relative distance from the sun
zvonat [6]
I think it's 150 million kilometers/93 million miles.
4 0
3 years ago
A 120-V motor has mechanical power output of 2.20 hp. It is 91.0% efficient in converting power that it takes in by electrical t
Mandarinka [93]

Answer:

a) i = 15.033\,A, b) \dot E_{in} = 1.804\,kW, c) C = 0.496\,USD

Explanation:

a) Electric power transmitted into the motor is:

\dot E _{in} = \frac{(2.20\,hp)\cdot \left(0.746\,\frac{kW}{hp} \right)}{0.91}

\dot E_{in} = 1.804\,kW

The current in the motor is:

i = \frac{1804\,W}{120\,V}

i = 15.033\,A

b) The energy delivered to the motor is:

\dot E_{in} = 1.804\,kW

c) The cost of running the motor for 2.50 hours is:

C = (1.804\,kW)\cdot (2.5\,h)\cdot \left(3600\,\frac{s}{h} \right)\cdot \left(\frac{1}{3600}\,\frac{kWh}{kJ}  \right)\cdot \left(0.110\,\frac{USD}{kWh} \right)

C = 0.496\,USD

4 0
4 years ago
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