A body with a mass of 5 Kg has the same kinetic energy as a second body. The second body has a mass of 10 kg and is moving at a speed of 20 m/s. How fast is the second body moving?

Answers

Answer 1

Answer: First body:

$E_(k_1)=(1)/(2).m.v^2\n \n E_(k_1)=(1)/(2).5.v_1^2=(5)/(2).v_1^2$

Second body:

$E_(k_2)=(1)/(2).m.v_2^2\n \n E_(k_2)=(1)/(2).10.(20)^2=2.000 \ J$

From description of the task we have:

$E_(k_1)=E_(k_2)\n \n (5)/(2).v_1^2=2.000 \ J\n \n 5.v_1^2=4.000 \ J\n \n v_(1)^2=800 \ J\n \n v_(1)= √(800) \ J \approx 28,3 \ m/s$

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What are some similarities between heat and temperature?

Answers

Answer
Heat is a form of energy while temperature is the measure or degree of coldness or hotness of a substance, place or something.
The similarities between heat and temperature are:
1. Heat causes the temperatures to raise. This means that it is the heat energy that causes temperatures to change.
2. Both heat and temperatures can be measured by specific units. Heat is measured in joules while temperature is measured in kelvin.

By definition, we have:

Heat:

Energy that is manifested by an increase in temperature and comes from the transformation of other energies; is originated by the vibratory movements of the atoms and the molecules that form the bodies

Temperature:

The temperature is a magnitude referred to the common notions of heat measurable by a thermometer. In physics, it is defined as a scalar quantity related to the internal energy of a thermodynamic system

Some similarities are:

1) The more heat there is, the higher the temperature.

2) The less heat there is, the lower the temperature.

3) Mathematically the heat and the temperature difference between two points are proportional.

While watching a recent science fiction movie, one Klingon spaceship blows up a Droid spaceship with a laser gun. The Klingon crew watches out the port window and covers their ears to muffle the noise from the explosion. Scientifically, this scene is inaccurate because A)
light can not reflect off objects in the vacuum of space.

B)
they would not be able to see anything outside the window.

C)
lasers can not be transmitted through the vacuum of space.

D)
the sound of the explosion would not be transmitted back to their ship.

Answers

Answer:

D) the sound of the explosion would not be transmitted back to their ship.

Explanation:

Sound is a mechanical wave. A mechanical wave requires a medium to travel and transfer energy. It travels be compression and rarefaction of the medium. Since in space it is vacuum, the sound energy by the explosion of the spaceship would not be able to travel through the space, the Klingon crew are not required to cover their ears to muffle the noise. This scene would be inaccurate scientifically.

D. is the right answer because his pressure is very bad out there in the air.good luck

What currents are responsible for powering the movement of tectonic plates ? A. Platonic B. Tectonic C. Convection D. Plutonium

Answers

the currents responsible for powering the movement of tectonic plates is convection currents which occur in the mantle. As the hotter, less dense liquid rises it displaces the cooler more dense liquid which moves the tectonic plates out of allignment

Convection currents are responsible for powering the movement of tectonic plates.

according to newtons second law of motion, when an object is acted on by an unbalanced force, how will that object respond?

Answers

Explanation:

Newton's second law of motion states that when a certain force is acted on an object then it is equal to the mass m of that object multiplied by the acceleration a of the object.

Mathematically, the relation is as follows.

F = m × a

Thus, we can conclude that when an object is acted on by an unbalanced force then the object will start to accelerate.

When an object is acted on by an unbalanced force, then that object will accelerate.

What is the most basic level of knowledge that contains the most specific concepts

Answers

Elementary knowledge is essential and specialised. This level teaches fundamental concepts in numerous subjects.

"Elementary" or "fundamental" knowledge contains the most particular notions. This understanding creates the foundation for more complicated thoughts and numerous fields of study.

Elementary knowledge in science, mathematics, and other fields includes foundational ideas, definitions, and concepts needed to understand more complex topics. Such as:

Elementary mathematics includes basic arithmetic, number characteristics, and geometric shapes.

Elementary physics contains Newton's laws and thermodynamics.

Grammar, sentence structure, and vocabulary are elementary in language and literature.

Programming and data structures are computer science basics.

Elementary biology covers cell structure and function.

This foundational information is essential for understanding and interpreting more sophisticated ideas and theories in numerous topics. It supports field-specific learning and exploration. As a person masters basic knowledge, they can go on to more complex topics in their field.

To know more about fundamental concepts

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It is the most general is the superordinate concept, followed by the basic concept, and the most specific is the subordinate concept.

A cubic centimeter can be expressed as a.cm3 or cc b. ccm c. ccm3 or d.ct

Answers

A cubic centimeter can be expressed as a. Cm3

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