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Dmitry_Shevchenko [17]
3 years ago
10

Electrical energy is transformed into mechanical energy in a motor when the

Physics
2 answers:
Yuri [45]3 years ago
5 0

Answer:

A. Commutator

Explanation: took the quiz

lapo4ka [179]3 years ago
4 0

Answer: battery

Explanation:

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what is the specific heat capacity of silver metal if 55.00g of the absored 47.3 calories of heat and temperature rise 15.°c​
igor_vitrenko [27]

Answer:

0.240 J/(g^{\circ}C)

Explanation:

When an amount of energy Q is supplied to a sample of substance of mass m, the temperature of the substance increases by \Delta T according to the equation

Q=mC_s \Delta T

where

C_s is the specific heat capacity of the substance

In this problem, we have:

m = 55.0 g is the mass of the sample of silver

Q = 47.3 \cdot 4.184 = 197.9 J is the amount of energy supplied to the sample

\Delta T = 15^{\circ}C is the change in temperature of the sample

Solving the equation for C_s, we find the specific heat capacity of silver:

C_s = \frac{Q}{m \Delta T}=\frac{197.9}{(55.0)(15)}=0.240 J/(g^{\circ}C)

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