PHYSICS MIDDLE SCHOOL

The round pea seed trait is dominant over the wrinkled pea seed trait. If the phenotype of the pea seed is wrinkled, which combination of genes must have it? A.)Two round genes
B.)One wrinkled gene only
C.)Once round gene only
D.)Two wrinkled genes

Answers

Answer 1
Answer: D. It must have two wrinkled genes.
Whenever one or more of the parents' genes are dominant, the resulting daughter gene will be dominant.
Thus, in order to produce a recessive gene, BOTH parent genes must be recessive as well. Because wrinkled genes are recessive, you're going to need both wrinkled genes.

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Which is the force that slows a book sliding ona table

Answers

friction is the force. Friction is also what makes the heat when you rub your hands together really fast for a while, and without it, if you started running in an open field and then tried to stop, you would just keep going on forever until you collided with something
The force that slowed the book from sliding on a table is friction, friction is a type of force that causes things to slow down. In this the book slowed down because of friction.

A circuit has a known resistance of 5 Ohms. An ammeter in the circuit gives a reading of 5 Amps. What is the Voltage of the circuit?

Answers

E = I R

Voltage = (current)×(resistance).

V = 5A x 5 ohms = 25 volts.

Explain the scientific meaning of the word random

Answers

Explanation:

In general the word random means by chance. The event that occurs unknowingly rather than according to plan is called at its randomness.

But in science, the word random relates with a type of event that is described by its probability distribution.

Also, random means the entropy of the system i.e. it is a thermodynamic quantity that represents the amount of energy in the system that is unavailable for doing work.

Hi :) what’s the difference between conduction in metals & non-metals ? I know it’s the free electron diffusion thingy but I really don’t understand it at all. anyone able to help? Thank you!

Answers

The difference between metal and non-metal in terms of condition is explained below.

Explanation:

  • In metals, conduction occurs due to the aggregation of vibrations of molecules and free-electron distribution. While in non-metals, the mechanism for conduction is only atomic or molecular vibrations.
  • Apart from free electrons, there are phonons in metals as well as non-metals. Non-metals hold a confined amount of thermal conductivity only due to Phonons and Lattice vibrations.
  • Concerning atomic vibration in a solid thing (non-metals mainly), it is easier to know if one receives the fact that atoms are almost floating adjacent to one another depending on the covalent bonds between them.
  • When a metal is heated the electrons quickly respond to the heat and transfer it to the nearby atom or solid touching it. As non-metals don't possess free electrons, the heat transfer happens due to phonons (the excited state of the lattice structure vibrating uniformly).
  • In metals, this rarely plays a role as the electrons transfer most of the heat efficiently.

Wat is the meaning of inference?

Answers

An inference is a guess of what may happen or what is going on that isn't implied in the story.

The meaning of inference is the process of inferring  something and it is a noun

The Law of Gravitation was mathematically defined by who?

Answers

The Law of Gravitation was mathematically defined by Isaac Newton
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