If critical mass is reached, it can cause: A: electrons to split
B: a chain reaction
C: a fusion of uranium nuclei
D: krypton atoms to split into strontium and xenon
Answers
The correct answer is:
B: a chain reaction
Explanation:
A chain reaction is a series of reactions where a reactive output or by-product produces additional reactions to earn a place. In a chain reaction, extremely feedback leads to a self-amplifying series of events.
Chain reactions are one way that systems which are not in thermodynamic stability can release energy or improve entropy in order to enter a state of greater entropy.
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what is the kinetic energy of an object that has mass of 30 kilograms and move with a velocity of 20 m/s
(d) You observe someone pulling a block of mass 41 kg across a low-friction surface. While they pull a distance of 4 m in the direction of motion, the speed of the block changes from 5 m/s to 7 m/s. Calculate the magnitude of the force exerted by the person on the block.
Answers
how do you calculate this
Answers
(That's about 10% less than on Earth.)
2). Look up the radius of Venus. It's 6051.8 km.
(That's about 5% less than Earth's.)
3). Remember that the gravitational field (acceleration, force) changes
opposite to the square of the distance from the planet ... or the distance
between any two masses that are gravitating.
Now we have enough information to do the calculating. Notice that the question
only asks for the planet's "gravitational field" (acceleration) way out there. That
has nothing to do with the satellite's mass, or whatever you decide to put out there,
or even if there's nothing out there at all. It's just a characteristic of Venus at that
distance from it.
The distances we need to compare are the distances from the center of Venus.
On the surface (distance from the center is the radius of Venus), it's 6,051,800 m.
In the orbit, it's 37,000,000 m.
The ratio is (37,000,000 / 6,051,800) = about 6.1 .
The gravity way out in the orbit is less than on the surface, and by the
same amount as the square of the distance ratio.
Surface gravity = 8.87
Gravity out at the orbit = 8.87 divided by (the distance ratio)²
Gravity = 8.87 / (6.1)²
Better way: Gravity = 8.87 x (6,051,800/37,000,000)² = 0.2373 m/sec²
Answers
A positive charge is placed in an electric field that points west. the direction of the force on the positive particle point toward the west.
What is an electric charge?
Due to the physical characteristic of electric charge, charged material experiences a force when it is exposed to an electromagnetic field. Electric charges can be positive or negative (commonly carried by protons and electrons respectively). While like charges repel one another, opposite charges attract. If an object has no net charge, we refer to it as neutral.
The charge on one electron is -1.6 ×10⁻¹⁹ coulomb.
As given in the problem statement when a positive charge is placed in an electric field that points west. the direction of the force on the positive particle will also point toward the west because for a positively charged
particle the direction of the electric field is the same as the force.
Thus, a positive charge is introduced into a westward-pointing electric field. the force acting on the positive particle points westward
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positive charge immersed in the field. The force on the particle points west.
Answers
Answer:
It is primarily due the Sun.
Explanation:
Sun is the ultimate source of energy.
Due to the heat of Sun, the atmosphere heats up unevenly. Due to which there is a temperature difference between the two regions. As the temperature difference is maintained, the air flows, i.e., atmosphere is moving.
Similarly, water gets heat up unevenly in oceans. Due to which a temperature difference is maintained between two points in the ocean and thus the oeans are moving constantly.
Answers
Answer:
Explanation:
Given
Kinetic energy varies jointly as mass and square of velocity
for
for
Divide 1 & 2 we get
Final answer:
Kinetic energy is proportional to mass and the square of velocity. It can be calculated for different masses and velocities using a constant derived from specific known values.
Explanation:
The principle of kinetic energy states that kinetic energy is directly proportional to mass and the square of velocity. Therefore, we can use the equation Kinetic Energy = 0.5 * Mass * Velocity^2 to calculate kinetic energy.
In this example, a mass of 15 grams and a velocity of 3 cm/s generates a kinetic energy of 27 ergs. By this equation, we derive a constant K. For a mass of 5 grams and a velocity of 9 cm/s, we can easily find the kinetic energy using this K value and multiplying it with the given mass and the square of the velocity.
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B. The object will move if the forces are balanced.
C. The object will move if the forces are unbalanced.
D. The object will always stay in place.
3. An object moves in the direction of the __________ force.
A. net
B. balanced
C. strongest
D. weakest
Answers
Answer:
C. The object will move if the forces are unbalanced.
A. net
Explanation:
just took the test swear to god that the answer