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2 years ago

Please help me

Physics

1 answer:

notsponge [240]2 years ago

6 0

The he nickel has a greater density than the penny and quarter because it has the greater mass to volume ratio.

<h3>What is density?</h3>

Density is the ratio of the mass and volume of a substance.

Density measures the compactness of the particles of a substance.

When comparing the density two objects of equal volume, the denser objects will have more mass or weight.

The model hypothesis is as follows:

If the nickel has a greater density than the penny and quarter, then it will have a greater mass to volume ratio. If the penny has a lower density than the nickel and quarter, then it will have a lower mass to volume ratio.

By taking measurements of the mass and volume of the nickel, penny and quarter, it will be observed that the nickel has the higher mass to volume ratio. Hence, nickel has a greater density than the penny and quarter.

In conclusion, the density of a substance is the mass and volume ratio of that substance.

Learn more about density at: brainly.com/question/952755

#SPJ1

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A radar station detects an airplane approaching directly from the east. At first observation, the range to the plane is 375.0 m

Gekata [30.6K]

Answer:

819.78 m

Explanation:

<u>Given:</u>

OA = range of initial position of the airplane from the point of observation = 375 m
OB = range of the final position of the airplane from the point of observation = 797 m
$\theta$ = angle of the initial position vector from the observation point = $43^\circ$
$\alpha$ = angle of the final position vector from the observation point = $123^\circ$
$\vec{AB}$ = displacement vector from initial position to the final position

A diagram has been attached with the solution in order to clearly show the position of the plane.

$\vec{OA} = OA\cos \theta \hat{i}+OA \sin \theta \hat{j}\\\Rightarrow \vec{OA} = 375\ m\cos 43^\circ \hat{i}+375\ m\sin 43^\circ \hat{j}\\\Rightarrow \vec{OA} = (274.26\ \hat{i}+255.75\ \hat{j})\ m\\\vec{OB} = OB\cos \alpha \hat{i}+OB \sin \alpha \hat{j}\\\Rightarrow \vec{OB} = 797\ m\cos 123^\circ \hat{i}+797\ m\sin 123^\circ \hat{j}\\\Rightarrow \vec{OB} = (-434.08\ \hat{i}+668.42\ \hat{j})\ m$

Displacement vector of the airplane will be the shortest line joining the initial position of the airplane to the final position of the airplane which is given by:

$\vec{AB}=\vec{OB}-\vec{OA}\\\Rightarrow \vec{AB} = (-434.08\ \hat{i}+668.42\ \hat{j})\ m-(274.26\ \hat{i}+255.75\ \hat{j})\ m\\\Rightarrow \vec{AB} = (-708.34\ \hat{i}+412.67\ \hat{j})\ m$

The magnitude of the displacement vector = $\sqrt{(-708.34)^2+(412.67)^2}\ m = 819.78\ m$

Hence, the magnitude of the displacement of the plane is 819.67 m during the period of observation.

8 0

3 years ago

An unbalanced force of 20 N is applied to a 10 kg mass. What is the acceleration of the mass?

NemiM [27]

Answer:

2 m/s2

Explanation:

Newton's 2nd law:

F=ma

20 N= (10 kg)a

a= 2 m/s2

8 0

3 years ago

Can you put hot water in a insulated gatorade cooler

Elina [12.6K]

Yes is the answer for you

5 0

3 years ago

Select the correct answer.

Gelneren [198K]

Answer: It's b and c I got it right

Explanation:

Hope this helped!!!! :)

8 0

3 years ago

There is a current I flowing in a clockwise direction in a square loop of wire that is in the plane of the paper. If the magneti

MArishka [77]

Answer:

IBL²

Explanation:

Given that

Current flowing in the wire, is I

Magnetic field towards the right, is B

Length of each side of the loop, is L

Number of windings on the loop, is N

Torque exerted on the wire, is T

The torque, T is usually given by the formula

Torque, T = NBIAsinθ,

and if N = 1 and sinθ = 1 also, then we have

Torque, T = BIA

And we know that Area A from this particular question will be given as = L². If we then substitute A for L², we then have

Torque, T = IBL²

4 0

3 years ago