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3 years ago

Help me pleaseeeeee?!!!!!!!

Physics

1 answer:

Gnom [1K]3 years ago

4 0

There are 8 neutrons and 8 protons in the nucleus of an oxygen atom.

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Ask Your Teacher A coil is formed by winding 260 turns of insulated 16 gauge copper wire (diameter = 1.3 mm) in a single layer o

Liula [17]

Answer:

The resistance is $2.98$ Ω

Explanation:

<u>Data</u>

diameter: $d=1.3mm$ , $d=1.3*10^{-3} m$

Radius: $r=\frac{d}{2} ,r=\frac{1.3*10^{-3} }{2} ,r=6.5*10^{-4} m$

Resistivity constant: $p=1.65*10^{-8}$ Ω $m$

To find Area:

$A=\pi r^{2} \\A=\frac{22}{7} *(6.5*10^{-4} )\\A=1.33*10^{-6} m^{2}$

To find circumference:

$l=260*(2\pi (0.15))\\l=245.04m$

Now we can apply the Resistivity formula:

$R=p\frac{l}{A}$

$R=(1.65*10^{-8} )$ Ω $m*\frac{240.04m}{1.33*10^{-6}m^{2} }$

$R=2.98$ Ω

4 0

4 years ago

Summarize the two stages of cellular respiration.

denpristay [2]

<span>Glycolysis. In glycolysis, glucose—a six-carbon sugar—undergoes a series of chemical transformations. In the end, it gets converted into two molecules of pyruvate, a three-carbon organic molecule.
Pyruvate oxidation. Each pyruvate from glycolysis goes into the mitochondrial matrix—the innermost compartment of mitochondria. </span>

5 0

3 years ago

Sam runs 9 kilometers in 2.5 hours. what is his speed?

svp [43]

Considering the definition of speed, the speed of Sam is 3.6 $\frac{km}{h}$ .

<h3>Definition of speed</h3>

Speed is a quantity that expresses the relationship between the space traveled by an object. That is, the speed is associated with the change of position of an object in space within a certain amount of time.

The speed can be calculated using the expression:

$speed= \frac{displacement}{time}$

<h3>Speed of Sam</h3>

In this case, you know:

displacement= 9 km
time= 2.5 h

Replacing in the definition of speed:

$speed= \frac{9 km}{2.5 h}$

Solving:

<u><em>speed= 3.6 </em></u> $\frac{km}{h}$

Finally, the speed of Sam is 3.6 $\frac{km}{h}$ .

Learn more about speed:

brainly.com/question/13803208

brainly.com/question/20725831

#SPJ1

3 0

2 years ago

Briefly summarize how the pulleys worked with respect to changes in effort force and effort distance compared with resistance fo

professor190 [17]

It helps applying force in any direction. Pulley systems rely on the relationship between the load and the effort. It also increase the lifting distance. Useful for getting the drive action to happen in awkward places. The bigger the mechanical advantage the lesser amount of force is needed to be exerted.

5 0

3 years ago

2. A police car drives from a police station to a distance of 170 km in 4 hours. He then stops at a gas station for 1 hour to fi

Reil [10]

Answer:

a.42.5 km/h or .71 km/m

b. 66.7 km/h or 1.1repeating km/m

c.41.5 km/h or .69 km/m

Explanation:

These are all average speed problems, meaning you divide the distance traveled by the time $s=\frac{d}{t}$

A. 170km/4hrs or 170km/240 mins

B. 100km/1.5hrs or 100km/90mins

C. The only tricky thing here is the question seems like it wants the speed for all of the information given, so you do include the one hour that he stops

270km/6.5 hrs or 270km/390 mins

5 0

3 years ago