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DENIUS [597]
4 years ago
12

Two objects are made of the same material, but they have different masses and temperatures.

Physics
2 answers:
Xelga [282]4 years ago
8 0

Answer:

a. The one with the lesser mass.

Explanation:

Since , both are made of the same material , they will have same specific heat . On physical contact , heat will be exchanged between them with heat flowing from body at higher temperature to one at lower temperature . Amount of heat lost by one will be equal to amount of heat gained .

So temperature change will take place in both of them  but they will not be same . Body of higher mass will undergo lesser change in temperature because of the following relation

Q = mcΔT

ΔT = Q / mc

ΔT   ∝   1 / m

change in temperature will be inversely proportional to mass of object if Q or heat exchanged is constant .

galben [10]4 years ago
3 0

Answer:

f. Not enough information

Explanation:

Since, we know from the equation of heat transfer by a mass due to temperature difference is given as:

Q=m.c.\Delta T

\Rightarrow \Delta T=\frac{Q}{m.c}

where;

m= mass of the substance

c= specific heat of the substance

\Delta T= difference between the final and initial temperature

Since the temperature difference depends upon the heat transferred which depends upon initial temperature of the substance and the mass of the substance.

So, it is ambiguous that which mass has the higher temperature the greater mass or the lesser mass.

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kiruha [24]

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Explanation:

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Acceleration is defined as the change in velocity with time:

  Acceleration = \frac{change in velocity}{time taken}

If there is no change in velocity i.e constant velocity.

At constant velocity, the change in velocity is 0.

 If we put zero in the equation above, we will obtain an acceleration value of 0.

Learn more:

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8 0
4 years ago
If a 60-g object has a volume of 30 cm", what is its density?
alisha [4.7K]

Answer:

Density = Mass/volume. D= 60/30.Divide it and you'll get ur answer as 2

5 0
3 years ago
Light in vacuum travels at a speed of 3.00 x 10^8 m ^-1 s^-1 on average earth is 93,000,000 miles from the sun how many minutes
NemiM [27]
The correct unit for the speed of light is  [ m s⁻¹ ].

Time = (distance) / (speed)

Time = (9.3 x 10^7 miles) x (1609 m/mile) / (3 x 10^8 m/s) = 498.8 seconds .

That would be  <em>8.31 minutes</em>.  
6 0
3 years ago
Lee pushes horizontally with a force of 75 n on a 36 kg mass for 10 m across a floor. calculate the amount of work lee did. answ
svlad2 [7]
To find work, you use the equation: W = Force X Distance X Cos (0 degrees)
Following the Law of Conservation of Energy, energy cannot be destroyed nor created.

So you would do 75 N x 10m x Cos (0 degrees)= 750 J
8 0
3 years ago
Read 2 more answers
A 20 μF capacitor initially charged to 30 μC is discharged through a 1.5 kΩ resistor. Part A How long does it take to reduce the
Natasha_Volkova [10]

Answer:

it will take 36.12 ms to reduce the capacitor's charge to 10 μC

Explanation:

Qi= C×V

then:

Vi = Q/C = 30μ/20μ = 1.5 volts

and:

Vf = Q/C = 10μ/20μ = 0.5 volts

then:

v = v₀e^(–t/τ)  

v₀ is the initial voltage on the cap  

v is the voltage after time t  

R is resistance in ohms,  

C is capacitance in farads  

t is time in seconds  

RC = τ = time constant  

τ = 20µ x 1.5k = 30 ms  

v = v₀e^(t/τ)  

0.5 = 1.5e^(t/30ms)  

e^(t/30ms) = 10/3  

t/30ms = 1.20397

t = (30ms)(1.20397) = 36.12 ms

Therefore, it will take 36.12 ms to reduce the capacitor's charge to 10 μC.

7 0
4 years ago
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