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3 years ago

This is for physical science. Can someone help me?

Physics

2 answers:

Radda [10]3 years ago

6 0

A. 320 g
B. 160 g
C. 80 g
D. 40 g

romanna [79]3 years ago

5 0

You can use these steps for most if not all of the problems

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To what temperature will a 79.0 g piece of glass raise if it absorbs 9457 calories of heat and its specific heat capacity is 0.5

ruslelena [56]

Answer:

T_final = 279.4 [°C]

Explanation:

In order to solve this problem, we must use the following equation of thermal energy.

$Q=m*C_{p}*(T_{f}-T_{i})$

where:

Q = heat = 9457 [cal]

m = mass = 79 [g] = 0.079 [kg]

Cp = specific heat = 0.5 [cal/g*°C]

T_initial = initial temperature = 40 [°C]

T_final = final temperature [°C]

$9457 = 79*0.5*(T_{f}-40)\\239.41=T_{f}-40\\\\T_{f}=279.4[C]$

8 0

3 years ago

You and your friends are driving down the road. Your car breaks down. You have to use a 1,210 N force to push the car 201 m to t

Katyanochek1 [597]

Answer:

$2.43\cdot 10^5 J$

Explanation:

Since the force applied is parallel to the displacement of the car, the work done on the car is simply given by:

$W=Fd$

where

F = 1210 N is the force applied on the car

d = 201 m is the displacement of the car

Substituting numbers into the equation, we find:

$W=(1210 N)(201 m)=2.43\cdot 10^5 J$

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4 years ago

Fiber optic (FO) cables are based upon the concept of total internal reflection (TIR), which is achieved when the FO core and cl

kozerog [31]

Answer:

False

Explanation:

Though fiber active cable is based on the concept of internal reflection but it is achieved by refractive index which transmit data through fast traveling pulses of light. It has a layer of glass and insulating casing called “cladding,”and this is is wrapped around the central fiber thereby causing light to continuously bounce back from the walls of the Cable.

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3 years ago

At the end of the adiabatic expansion, the gas fills a new volume V₁, where V₁ > V₀. Find W, the work done by the gas on the

tino4ka555 [31]

Answer:

$W=\frac{p_0V_0-p_1V_1}{\gamma-1}$