Explanation:
D) 75 J
Energy is neither related nor destroyed- it's simply converted to different forms. Forces are vectors with both mass and acceleration; they are interactions that have the ability to change an object's motion. As objects move, their potential energy (apprx 100 J) is converted to kinetic energy. However, friction a resistive force, which is formed from the conversion of an object's kinetic energy into heat energy, as two surfaces move along each other.
With the reduction of friction, the energy output should increase, as less energy is lost as heat. Thus, the output should be 75 J.
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Answer:
The correct answer is c) action potential
Explanation:
Action potential starts with the opening of the sodium channel in response to the stimulus given to the neuron by neurotransmitter. This opening of sodium ion channel results in the influx of sodium ions in the receptive region of neurons from outside. This is the depolarization step of action potential.
Before this step, the neurons are negatively charged from inside and positively charge outside and this stage it is considered to be resting stage.
As the amount of Na⁺ reaches the threshold value the action potential fires and send the electric signals down to axons.
Therefore action potential occurs because of the influx of Na⁺ ions through chemically gated channels in the receptive region of a neuron.
Explanation:
People now understand the world they live in due to science. This understanding has also led to the acknowledgment of the impact of human activities, such as the burning of fossil fuels, on other aspects of the earth like ecosystems & climate.
Science has also allowed humans to develop ways of making work easier. An example is the invention of the wheel and engine that has allowed the movement of persons to become far easier and faster.
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