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Eduardwww [97]
3 years ago
7

Determine the amount of thermal energy that must be transferred to a copper wire (mass 20g) to

Physics
1 answer:
Colt1911 [192]3 years ago
8 0

Answer:  Thermal energy is 8,2 kJ

Explanation:  Heat Q = m c ΔT .    c = 385 J/kg C  and

ΔT = (1085 - 25)C = 1060 C.   Q = 0.020 kg · 385 J / (kg C) ·1060 C

= 8162 J

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The acceleration of a particle is given by a = 3t – 4, where a is in meters per second squared and t is in seconds. Determine th
Genrish500 [490]

Answer:

v=0.04m/s\\

s=-28.592m\\

Explanation:

a = 3t-4

v(t)=\int\limits^t_0 {a(t)} \, dt =3/2*t^{2}-4t+v_0\\

if t=3.6s and initial velocity, v0,  is -5m/s

v=0.04m/s\\

s(t)=\int\limits^t_0 {v(t)} \, dt =1/2*t^{3}-2t^{2}+v_0*t+s_0\\

if t=3.6s and the initial displacement, s0, is -8m:

s=-28.592m\\

5 0
3 years ago
two identical steel balls mounted on wooden posts initially have different amounts of charge, one with -14uC and the other with
GrogVix [38]

According to the Law of Conservation of Charge, the net charge remains constant. If both things have different charges, upon contact, they would share the charge equally. In this case, the total charge is -16μC. The final charge for each ball would be -8 μC.

7 0
4 years ago
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Solve for the final velocity using the picture below what type of collision is this an example of
mariarad [96]

wheres the picture ?????????????????????????

4 0
3 years ago
g A small object of mass 2.5 g and charge 18 uC is suspended motionless above the ground when immersed in a uniform electric fie
kvasek [131]

Answer: 1361.11\ N/C,\text{upward}

Explanation:

Given

Mass of particle is m=2.5\ gm

Charge of particle is q=18\ \mu C

Electrostatic force must balance the weight of the particle

\lim_{n \to \infty} a_n \Rightarrow mg=qE\\\\\Rightarrow E=\dfrac{2.5\times 9.8\times 10^{-3}}{18\times 10^{-6}}\\\\\Rightarrow E=1361.1\ N/C

Direction of the electric field is in upward direction such that it opposes the gravity force.

4 0
3 years ago
The properties of ductility, malleability, ability to conduct heat and electricity are characteristics of what type of material?
laiz [17]
These are  the characterstics of metal.


                 hope it helps u........
8 0
4 years ago
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