What's exactly the 4 dimension (4D)?

Answers

Answer 1

Answer: Time is bounded up in the concept of Space. One without the other cannot be. Time is, in the Theory of Strings, the 4th dimension.

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I have a question and no one has helped me yet so I'm re-submitting it. thanks in advance.
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If an object has a mass of 50 kg and is accelerating at 2m/s/s, what is the force it will exert?

Answers

the formula you're looking for is Force = mass * acceleration. this means the force = 50 * 2, which is 100N

Cecil is working with samples of chlorine (Cl), oxygen (O), bromine (Br), and silver (Ag). The samples are all at room temperature. Which substance is most likely the most dense?chlorine
oxygen
bromine
silver

Answers

Answer: Option (d) is the correct answer.

Explanation:

As it is known that density is the amount of mass divided by the volume.

Mathematically, Density = $(mass)/(volume)$

Since, mass is directly proportional to density. Hence, more is the mass of an object more will be its density.

At room temperature chlorine exists as a gas and its molar mass is 35 g/mol.

At room temperature oxygen exists as a gas and its molar mass is 32 g/mol.

At room temperature bromine exists as a liquid and its molar mass is 80 g/mol.

At room temperature silver exists as a solid and its molar mass is 108 g/mol.

As the mass of silver is greater and it exists as a solid at room temperature. Hence, it will be most dense in nature.

Therefore, we can conclude that out of the given options silver substance is most likely the most dense.

The answer is silver. Silver is the most dense, it's a solid so it is more compact and is obviously the most likely to have more mass to it.

Is is true the state of a medium helps determine the speed of sound passing through the medium

Answers

Ya, how'd you know, research?

A spring (k = 20 N/m) sits on a frictionless surface. The spring is compressed 20 cm and a 2 kg mass is placed before the spring and released from rest. How much time passes between the time that the mass is at the point x = 0 m and x = 2.0 m? A.) 4.34s B.) 1.42s C.) 2.48s D.)0.23s E.)none of the above

Answers

Answer:

E.)none of the above

Explanation:

Elastic energy = kinetic energy

½ kx² = ½ mv²

v = x √(k / m)

v = 0.2 m √(20 N/m / 2 kg)

v = 0.632 m/s

Time to travel 2.0 m:

t = (2.0 m) / (0.632 m/s)

t = 3.16 s

If an oxygen has 8 protons in its nucleus what is its atomic number A.6 B.8 C.4 D.12

Answers

The atomic number = the number of protons.

8 = atomic number

Answer is 8 !

~Sarah Robinsen

A student has the following equipment - copper wire, nail made of iron,a battery, paperclips.How can he make an electromagnet and use it to separate a mixture of small pieces of copper and iron?

please help

Answers

The first step would be to create an electromagnet. You can create an electromagnet by winding a copper wire around the nail, the connect both ends to the battery. A current would start flowing around the nail through the wire, creating an electromagnet with its own magnetic field. Next, bringing the electromagnet to the mixture of copper and iron would slowly attract the pieces of iron (as copper is weakly magnetic). Do this slowly and the iron pieces would all slowly be separated from the copper pieces.

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