7. What mass of water will change its temperature by 3.0°C when 525 J of
heat is added to it?

Answers

Answer 1

Answer:

The mass of the water is 41.9 g

Explanation:

When an amount of energy Q is supplied to a sample of substance of mass m, the temperature of the substance increases by $\Delta T$ , according to the equation:

$Q=mC_s \Delta T$

where:

m is the mass of the substance

$C_s$ is the specific heat capacity of the substance

$\Delta T$ is the change in temperature

In this problem, we have:

Q = 525 J is the amount of heat supplied to the water

$\Delta T = 3^(\circ)C$ is the change in temperature of the water

$C_s = 4.18 J/gC$ is the specific heat capacity of the water

Solving for m, we find the mass of the water:

$m=(Q)/(C_s \Delta T)=(525)/((4.18)(3.0))=41.9 g$

Learn more about specific heat capacity:

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What is the velocity of a car that travels 100 meters north in for seconds

Answers

The velocity is 25 because you just divide 100/4

The equation for velocity is distance/time.. So if it goes 100m in 4 seconds.. It's 100/4 which equals 25 mls north. (Velocity includes the direction in the answer)

33. Which statement best describes a bacteria cell?a. It contains more than one cellb. It is a complete organismc. It is part of a larger organismd. It contains different kinds of cells

Answers

Answer: The correct answer is- It is a complete organism.

Bacteria is a unicellular microscopic organism that is a prokaryote. It means that the body of bacteria is made up of one cell only and it is responsible for all the essential activities required for the survival of bacteria.

Therefore, bacterial cell is a complete organism.

probably, d. it contains different kinds of cells.

I hope this's useful ^_~!!

Name three acids and three bases and list an industrial or household use of each

Answers

acid: soda(drink) stomach acid, vinegar
base: blood(red cross) egg whites( cook) baking soda (clean)

Bases:
Bleach (cleaning product)
Ammonia (cleaning product)
Baking Soda (weak base)
Drain Cleaner
Soap

Acids:
Lemon Juice (food product)
Vinegar (food/cleaning product)
Hydrogen Peroxide (weak acid) (cleaning/bleaching agent)
Coffee (food product)

What metric unit is used to describe the mass of an object

Answers

m for grams, kg for kilograms

Describe all the ways that newtons laws can apply in a car crash

Answers

Newtons first law - Objects in the car at rest (The human) will remain at rest unless affected by an unbalanced force. Well the unbalanced force would be the crash and this would set the human in motion and they would ether fly out the car if not wearing a seat belt or if wearing one they would get bad whip lash

Newtons second law - With more mass requires more force, so since the human is pretty light or even if heavy in a big crash there will be so much more from it that this will send the human flying.

Newtons 3rd law - Objects A puts force onto objects b and object b excretes the same amount of force back onto object a, so in a crash the human would hit the car hard and the car would excrete the same amount of force back on the human which would really damage him/her

Final answer:

Newton's laws of motion can be applied in a car crash to explain the physics and forces involved.

Explanation:

In a car crash, Newton's laws of motion can be applied in several ways:

Newton's first law: Also known as the law of inertia, this law states that an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. In a car crash, the body of the occupants tends to stay in motion until acted upon by a force, such as the seatbelt or the airbag.
Newton's second law: This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. In a car crash, the greater the force of impact, the greater the acceleration experienced by the occupants. This is why it is important to wear seatbelts and have properly functioning airbags.
Newton's third law: This law states that for every action, there is an equal and opposite reaction. In a car crash, when two vehicles collide, the force exerted by one vehicle on the other is met with an equal and opposite force.

Overall, Newton's laws of motion help explain the physics behind car crashes and the forces involved.

Learn more about Newton's laws of motion in a car crash here:

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All of the following could be considered reconstruction except A: scientists assume an area was once undersea due to the types of rock deposits
B: scientists assume an animal was a meat eater because of the teeth in its fossil C: scientists assume an animal could climb trees because of its hand structure D:scientists predict a volcano will erupt in the near future because of current volcanic activity

Answers

The first three choices: a, b and c can be considered reconstruction except the last one which is letter d. I'm not really certain what reconstruction is, but judging from the patterns of the first three choices, reconstruction could mean that an inference is made after a part of an event has proved that event to be true.

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