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2 years ago

Classify each model A-D as either an element, a compound, or a mixture. Explain your reasoning for each answer

Physics

1 answer:

ANEK [815]2 years ago

8 0

Answer:

Explanation:

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Two small plastic spheres each have a mass of 1.1 g and a charge of -50.0 nC . They are placed 2.1 cm apart (center to center).

Solnce55 [7]

Answer:

Part a)

F = 0.051 N

Part b)

Both spheres will follow Newton's III law of action reaction force so both sphere will have same force of equal magnitude.

Explanation:

Part a)

Electrostatic force between two charged spherical balls is given as

$F = \frac{kq_1q_2}{r^2}$

here we will have

$q_1 = q_2 = 50 nC$

here the distance between the center of two balls is given as

$r = 2.1 cm = 0.021 m$

now we will have

$F = \frac{(9\times 10^9)(50 \times 10^{-9})(50 \times 10^{-9})}{0.021^2}$

$F = 0.051 N$

Part b)

Both spheres will follow Newton's III law of action reaction force so both sphere will have same force of equal magnitude.

3 0

3 years ago

Find the horizontal component and the vertical component

aleksandr82 [10.1K]

Answer:

v=3.66,h-3.66

Explanation:

vertical = 10sin60 - 10sin 30

horizontal =10cos60 + 10cos 30

v = 10×0.8660-10×0.5

h = 10×0.5 + 10 × 0.8660

v=8.660-5.0 = 3.66

h= 5.0-8.660 = -3.66

8 0

3 years ago

An object with a resistance of 28 Ω has 76 V applied to it. How much electric current is going through this object? Answer in un

12345 [234]

Answer : The electric current of a circuit is, 2.8 A.

Explanation :

Using Ohm's law :

$V=I\times R$

Or,

$I=\frac{V}{R}$

where,

R = resistance of a circuit = 28 Ω

V = voltage of circuit = 76 volts = 76 V

I = current flowing in a circuit = ?

Now put all the given values in the above formula, we get :

$I=\frac{V}{R}$

$I=\frac{76V}{28\Omega }$

$I=2.8A$

Therefore, the electric current of a circuit is, 2.8 A

5 0

3 years ago

Car A has twice the mass of Car B; both travel at the same speed. Compared to Car B. Car A has:

krek1111 [17]

Answer:

Car A has twice the energy of car B.

Explanation:

The kinetic energy of an object is given by :

$K=\dfrac{1}{2}mv^2$

Where

m is the mass

v is the speed of the object

Car A has twice the mass of Car B. Both travel at the same speed i.e.

$m_A=2m_B$

So,

$\dfrac{K_A}{K_B}=\dfrac{(1/2)m_Av^2}{(1/2)m_Bv^2}\\\\=\dfrac{2m_B}{m_B}\\\\\dfrac{K_A}{K_B}=2\\\\K_A=2\times K_B$

So, the kinetic energy of car A is twice of the kinetic energy of car B.

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3 years ago

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Physics formula for Celsius to Fahrenheit

worty [1.4K]

F=9/5C+32 is the formula for Celsius to Fahrenheit.

7 0

4 years ago

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