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Car 1 has a of mass 1000kg and is going at 20m/s. Car 2 has the same mass as Car 1 and is stationary. If they collide and travel together as one unit in the same direction as Car 1 was going, calculate the speed of the unit after the collision.

By Conservation of Momentum Total Momentum Before= Total Momentum After thus m1v1+m2v2=(m1+m2)v3 Plugging in the numbers and re-arranging for v3 gives 1000 20+1000 0=2000*v3 v3=(1000*20)/2000=10m/s
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Answered by Aamir H. • Physics tutor
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What's the difference between a eukaryotic cell and a prokaryotic cell?

Eukaryotes have a plasma membrane, nucleus, nuclear membrane, nucleolus, smooth endoplasmic reticulum, rough endoplasmic reticulum, ribosomes, mitochondria, lysosomes, peroxisomes. Prokaryotes do not have a ...
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Answered by Elena D. • Biology tutor
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What are the 4 types of schedules of reinforcement, give an example of each.

Fixed interval: The presentation of a reward after a fixed amount of time (e.g., $1 every hour) Fixed ratio: The presentation of a reward after a fixed amount of effort (e.g., $1 every 5 questions answered) ...
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Explain what is meant by 'operant conditioning'.

Operant conditioning is where one is able to change the behaviour of another person or animal using reinforcement and punishment. The term was used by Skinner (1938) who demonstrated that when rats are posit...
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Answered by Lowri W. • Psychology tutor
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Is rule utilitarianism a better form of ethical decision making than act utilitarianism?

The decision rule with act utilitarianism is ‘perform the action that results in the maximum sum of utility from those available when making the decision’. By contrast rule utilitarianism offers the revised ...
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Answered by Joe M. • Philosophy tutor
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