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lakkis [162]
2 years ago
9

HELP PLEASE!!!!!!!

Physics
2 answers:
Roman55 [17]2 years ago
8 0

The silver substance is most likely a metal. Your answer is A.

Naily [24]2 years ago
7 0

Answer:

D or B

Explanation:

Hope this helps

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A constant force of 120 N pushes a 55 kg wagon across an 8 m level surface. If the wagon was initially at rest, what is the fina
Illusion [34]

Answer:

The kinetic energy of the wagon is 967.0 J

Explanation:

Given that,

Force = 120 N

Mass = 55 kg

Height = 8 m

We need to calculate the kinetic energy of the wagon

Using newtons law

F = ma

\dfrac{120}{55}=a

a =2.2\ m/s^2

Using equation of motion

v^2 =u^2+2as

Where,

v = final velocity

u = initial velocity

s = height

Put the value in the equation

v^2=0+2\times2.2\times8

v=5.93\ m/s

Now, The kinetic energy is

K.E=\dfrac{1}{2}mv^2

K.E=\dfrac{1}{2}\times55\times(5.93)^2

K.E=967.0\ J

Hence, The kinetic energy of the wagon is 967.0 J

3 0
3 years ago
- Light bulbs can be used to indicate current flow in a circuit. The brightness of a bulb is proportional to the amount of curre
Rama09 [41]

Light bulbs can be used to indicate current flow in a circuit. The brightness of a bulb is proportional to the amount of current passing throw it. The figure shows a battery, a switch, two light bulbs, and a capacitor that is initially uncharged The brightness of a lightbulb is given by its power. P = I2R, and so brightness depends on current and resistance

<h3>What is current flow?</h3>

A stream of charged particles, such as electrons or ions, traveling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control volume is how it is calculated. [622 Charge carriers, which can be any of a number of particle kinds depending on the conductor, are the moving particles. Electrons flowing over a wire are frequently used as charge carriers in electric circuits. They can be electrons or holes in semiconductors. Ions are the charge carriers in an electrolyte, whereas ions and electrons are the charge carriers in plasma, an ionized gas.

To learn more about current flow from the given link:

brainly.com/question/22650781

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5 0
1 year ago
A compressed spring has 16.2j of elastic potential energy when it is compressed 0.30m what is the spring constant of the spring
melisa1 [442]
The answer to the question is

<span>PE = W = 1/2 (kx^2)
16.2  = </span>1/2 (k(0.30)^2)
k = 360 J/m^2
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3 years ago
A continental tropical air mass is _______ and _______.
Masteriza [31]
A continental tropical air mass is dry and hot. It is formed over the land and in hot tropical areas. Summer months are when this kind of warm air mass is most noticeable and it can stay for a lengthy period of time.
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3 years ago
Difference between calorimeter and thermometer ?
Kaylis [27]
A calorimeter is can be used to measure the amount of heat released or involved in a chemical reaction. Whereas thermometer can only measures temperature or hotness of a substance. It cannot be used to measure the thermal rate or amount of heat energy of a reaction.
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3 years ago
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