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aivan3 [116]
4 years ago
5

What is true about mechanical energy? a. An object with mechanical energy cannot do work. c. Mechanical energy is the energy tha

t an object has due to its position b. An object with mechanical energy can exert an applied force on another object. d. All of the above.
Physics
1 answer:
Mama L [17]4 years ago
7 0
I believe the correct answer is C all the other options seem funny to me
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The metric system is a measurement system that is: only used by a few of the nations of the world. used exclusively in chemical
inysia [295]

Answer:

The metric system is the official system for all nations of the world.

Explanation:

To make measures, it is necessary to have a set of standardized magnitudes to compare things we want to measure. This set of standardized magnitudes is called a unit system.

The metric system is a decimalized system of measurement which has meters and grams as a basic measurement unit. The metric system is the most used in the world, and also, is the official system for all nations of the world.

7 0
3 years ago
You observe three carts moving to the left. Cart A moves to the left at nearly constant speed. Cart B moves to the left, gradual
Lady bird [3.3K]

Answer:cart B

Explanation:

For cart A speed is constant therefore there is no acceleration because acceleration is rate of change of velocity

thus there is no net force

For cart B there is change in velocity in the left direction , so there is net acceleration towards left

Force=mass\times acceleration

so there is net force in the left direction

For cart C there is decrease in velocity i.e. negative acceleration or deceleration . Therefore there is a net force towards right which opposes the motion                

6 0
3 years ago
Which of the following is not a result of deforestation?
klemol [59]

Answer:

B

Explanation:

5 0
3 years ago
Read 2 more answers
When air pressure decreases, the mercury in a barometer _____.
siniylev [52]

Answer:

The mercury in the barometer will go down as there is less air pressing down on the bulb of the barometer to push mercury up.

Explanation:

7 0
3 years ago
Calculate the change in internal energy (δe) for a system that is giving off 25.0 kj of heat and is changing from 12.00 l to 6.0
lora16 [44]

Since the system itself is giving off heat, this is a reduction in the internal energy.

heat = - 25,000 J

 

Since work is being done on the system, therefore it is an additional energy to the system. Work is given as:

work = - P dV

work = - 1.50 atm (6 L – 12 L)

work = 9 L atm

Since it is given that 1 L atm is equivalent to 101.3 J, therefore the total energy added is:

energy due to work = 9 L atm (101.3 J / 1 L atm)

energy due to work = 911.7 J

 

Therefore the total change in internal energy is the sum of heat and energy due to work:

Change in internal energy = - 25,000 J + 911.7 J

Change in internal energy = - 24,088.3 J

 

<span>Therefore, approximately 24.1 kJ of energy is lost by the system in the total process.</span>

<span>
</span>

<span>Answer:</span>

<span>-24.1 kJ</span>

8 0
3 years ago
Read 2 more answers
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