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Ne4ueva [31]
3 years ago
6

What is the velocity of a dropped object after it has fallen for 3.0 s?

Physics
1 answer:
madreJ [45]3 years ago
4 0

Answer:

30 m/s.

Explanation:

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A ball is thrown into the air with an upward velocity of 32 feet per second. Its height, h, in feet after t
LekaFEV [45]
Differentiate the expression, to obtain expression for velocity. Set velocity to 0, this when max height is reached. Obtain the tmax from that expression.

<span>h(t) = –16t² + 32t + 6
</span><span>h'(t) = –32t² + 32
0 = </span>–32t² + 32
t max= 1

hmax = <span> –16(1)² + 32(1) + 6
hmax = 22

Therefore, first option is the correct answer.</span>
8 0
3 years ago
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What is the smallest particle that relains<br> the properties of an element
VLD [36.1K]

Answer:

atom

Explanation:

Smallest particle of an element that identifies that element is an atom.

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2 years ago
What are ways to remove static charge
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Explanation:

Use a humidifier. Static electricity is more active when the air is dry, especially in the winter months when people heat their houses, further reducing humidity in the air. ...

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6 0
4 years ago
The continental ______ separates the continental crust from the oceanic crust.
Alona [7]

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Is there choices if so is oceanic crust an option

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6 0
3 years ago
Match the following terms. plz help. WILL GIVE BRAINLIEST
siniylev [52]

Hi!


1. R-Value - a standardized rating for insulating materials

R value is essentially the measure of the resistance to the conductive flow of heat that is determined by the thickness of a material. Different materials are allocated different R values in accordance with the degree of insulation they offer, such as a window, or a wall. It can be said to be the degree of insulation a layer of material offers, and the greater the R value, the higher the resistance it offers to the flow of heat, meaning better the insulation


2. Thermal Equilibrium - when two materials in contact are at the same temperature

Thermal equilibrium is a state when there is no net flow of thermal energy between two materials that are in contact through a pathway that offers thermal conductivity, or in more simple terms permeable to heat. If the temperature of a system is temporally and spatially consistent, the system is said to be in a thermal equilibrium.


3. Insulation - any material that reduces loss of energy due to heat flow

Insulation is when a material prevents the flow or passage of thermal energy or stops heat flow by some degree from one environment to another. For instance, a blanket offers insulation to the body by impairing the flow of heat from the body to the surrounding air. The greater the insulation, the less would be the flow of heat or thermal energy from one place to another.

4. Thermal Conductivity - a physical property of materials that relates its ability to conduct thermal energy

Thermal conductivity is a property of a material that deals with its ability to conduct heat, or thermal energy. The higher the thermal conductivity of a material, the greater would be the heat transfer within the material. For instance, a metal has a higher thermal conductivity that wood, meaning wood allows a lower transfer of heat through it. This is the reason why most cooking utensils such as spatula have a wooden base, instead of a metallic base.


Hope this helps!


7 0
3 years ago
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