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Len [333]
3 years ago
6

An object moving with a constant

Physics
2 answers:
mixer [17]3 years ago
6 0

Answer:

Formula = m/s

Explanation:

The answer is 10 m / 5 seconds = 2 meters distance

The answer is 20 m / 5 seconds = 4 meters distance

jeka57 [31]3 years ago
5 0

Answer:

Acceleration:

{ \tt{a =  \frac{v - u}{t} }} \\ { \tt{a =  \frac{20 - 10}{5} }} \\ { \tt{a = 2 \: m {s}^{ - 2} }}

From third equation:

{ \bf{ {v}^{2}  =  {u}^{2}  + 2as}} \\ { \tt{s =  \frac{ {20}^{2}  -  {10}^{2} }{2 \times 2} }} \\   = { \tt{s = 75 \: m}}

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If anyone can answer it'd be very appreciated, i need to pass this class
alexandr1967 [171]

Answer: 0.4

Explanation:

8 0
3 years ago
Read 2 more answers
The aluminum wire in a high-voltage transmission line is 2.7 cm in diameter. It is designed to carry a current of 1100 A. What i
marissa [1.9K]

Answer:

1660 V

Explanation:

Resistance should be determined and then voltage drop across the power line can be determined.

R = ρ L /A  

Here ρ = Resistivity of aluminum = 2.7\times 10^{-8}\Omega m

L = length = 32 km = 32,000 m

Area of cross section = A = π r² = π (0.027/2)² = 0.00057255 m²

Resistance = R =

(2.7\times 10^{-8}\Omega m (32,000)/(0.00057255) = 1.5090 Ohms.

Voltage drop = V = I R = (1100)(1.5090) = 1659.9 V.

(If resistivity value is different, then the resistance will be different and hence final answer for voltage will also vary ).

4 0
3 years ago
I need help pls help
Nikitich [7]
You want all those boxes filled in (0,0)
5 0
4 years ago
Which wave causes the medium to vibrate only in a direction parallel to the wave’s motion?
andreyandreev [35.5K]
When the vibration is in a direction parallel to wave's motion that is a Longitudinal wave  (C).

But When the vibration is in a direction perpendicular to wave's motion then it is Transverse wave.

6 0
4 years ago
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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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