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iren2701 [21]
2 years ago
5

What is a crystal as applied in physics ​

Physics
1 answer:
Scilla [17]2 years ago
4 0

Answer:

The correct answer is - A matter that has an ordered arrangement of atoms, molecules, or ions.

Explanation:

In physics, a crystal is a type of solid matter in which a highly arranged molecule or atoms present to form a lattice that extended in all directions. It is a lightweight clear solid which is normally is colorless.

It can be cubic, hexagonal, triclinic, monoclinic, orthorhombic, tetragonal, and trigonal that are ordered arrangments. Its internal symmetry is visible to its surface.

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A ball thrown vertically upward reaches a certain height and comes down again. What can you say about its kinetic energy at the
MrRissso [65]
The K.E. at the maximum height is zero, no matter what that height is.
4 0
3 years ago
Read 2 more answers
A 930-kg sports car collides into the rear end of a 2000-kg SUV stopped at a red light. The bumpers lock, the brakes are locked,
bekas [8.4K]

Answer:2.103 m/s

Explanation:

Given

mass of sports car m=930\ kg

mass of SUV M=2000\ kg

Suppose u is the velocity if sports car before collision

Conserving momentum we get

mu=(M+m)v

v=\dfrac{2000+930}{930}\times u

v=3.15\cdot u

After collision the combined mass drag 2.8 m and finally stops

From work energy theorem work done by friction is equal to change in kinetic energy of the  combined mass system

\frac{1}{2}(M+m)v^2=\mu (M+m)gx

where \mu =\text{coefficient of friction}

x=\text{drag distance}

v=\sqrt{2\mu gx}

v=\sqrt{2\times 0.8\times 9.8\times 2.8}

v=6.626\ m/s

Initial velocity u=\frac{6.626}{3.15}

u=2.103\ m/s

6 0
3 years ago
Mr. Rosa’s student has a backpack with a density of 30g/mL. How much mass does the backpack have if it takes up 12.3 cm cubed of
krek1111 [17]

Answer:

m = 369 grams

Explanation:

Given that,

The density of backpack, d = 30 g/mL

The volume of the backpack, V = 12.3 cm³

We need to find the mass of the backpack. The density of an object is given by :

d=\dfrac{m}{V}\\\\m=d\times V\\\\m=30\times 12.3\\\\m=369\ g

So, the mass of the backpack is 369 grams.

4 0
2 years ago
Transfer of charge by touching is called... induction or conduction?
Fantom [35]

Answer:

Transfer of charge by touching is called conduction.

6 0
2 years ago
Could anyone help me figure out d and e? How can you find the work of the friction when the force of friction is not given?
IRINA_888 [86]
Wow !  This is not simple, Shoot, and I give you a lot of credit
and an extra merit badge if you're generally keeping up with it.

I scratched my head for a few minutes, and I think I've got it.
Here's what I think is going on:

KE₁ = KE of the box before pushing
               (1/2) (m) (speed²) = 10 x 2² = 40 joules

KE₂ = KE of the box after pushing 3m
               (1/2) (m) (speed²) = 10 x 4² = 160 joules

The box gained (160 - 40) = 120 J of kinetic energy.

Now look at the cluttered force diagram.
Cat's component of force in the direction of motion is 120N.
That's the part of her force that does the work on the box.
How much work does she do ?

     (force) x (distance) = (120N) x (3m) = 360 joules .

Only 120 J of that energy showed up as increased kinetic energy
of the box.  The other 240J of her hard-earned work was consumed
by friction.

       Work of friction = (Friction force) x (distance)

               240 J        = (friction force)  x  (3 m)

              240 J / 3 m  =  friction 'force'  =  80 N . 

I think that's it.

What I did was:

-- Find the work that Cat did.

-- Find the increase in the kinetic energy of the box.

-- The difference ... the 'missing energy' ... was the work done
by friction in the same distance.

Does this do anything for you ?
3 0
3 years ago
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