What is t in the formula of Q=m C t

Answers

Answer 1

Answer: I could give you a reliable answer with total confidence if I knew what Q, m, and C are.

Answer 2

Answer: t is diference in temperature, how we can change temperature of our body. Example: If we want to heat water from 15 to 20 degress, difference in temeprature t will be 20-15=5

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What are the aplication of heating effect of electric current?

Answers

-- toasting bread
-- cooking on an electric stove
-- blow-drying hair, with warm air that blows over an electrical heat coil
-- curling iron (do girls use those any more?)
-- electric heater keeps your feet warm under the desk in the Winter
-- electric coffee percolator
-- car cigarette lighter
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when you park your car there in January, you either leave it running, or else plug it in.

Tungsten bulb, Electric Iron Press...As electricity passes through the wires(filament or nichrome respectively) they heats them and as a result filament lightens or Iron Press heats up.

How did Thomson know atoms had an overall neutral charge?He knew there were negative electrons but he came to the conclusion that the rest of the atom was positively charged, why was this? How did he know it would be positively charged?

Answers

He reasoned that there must be a source of positive charge within the atom to counterbalance the negative charge on the electrons.

In which of the following materials is the velocity of light greatesta. Water
B. Fused quartz
C. Air
D. Crown
d. glass

Answers

Penn Foster Students: air

Physics help!! 10ptA small object placed in the gravitational field of a more massive object will

A. accelerate toward the more massive object.
B. accelerate away from the more massive object.
C. move toward the more massive object at a constant speed.
D. move away from the more massive object at a constant speed.

Answers

A. accelerate toward the more massive object is your answer. In fact, even the acceleration with accelerate, also known as the jer.k. The more massive object will pull on the smaller object and the smaller object will increase its speed towards the more massive object.

idk why jer.k is a swear

Gravitational forces always appear in equal and opposite pairs.

When a small object is placed in a position near a more massive
object, there is a gravitational force on each object, attracting it
and drawing it toward the other one.

The force on the small object causes it to accelerate toward
the more massive one. The force on the more massive object
causes it to accelerate toward the smaller one.

The forces are equal. But since acceleration is inversely
proportional to mass, the small object heads toward the
more massive one with greater acceleration, and the more
massive object heads toward the smaller one with smaller
acceleration.

When you jump into the pool from the high diving board,
you accelerate toward the Earth, and the Earth accelerates
toward you. The gravitational forces between you and the
Earth are equal in both directions. But the Earth has more
mass than you have, so its acceleration toward you is smaller
than your acceleration toward it.

An object is located 51 millimeters from a diverging lens. The object has a height of 13 millimeters and the image height is 3.5 millimeters. How far in front of the lens is the image located? A. 1.12 millimeters
B. 13.7 millimeters
C. 51 millimeters
D. 189 millimeters

Answers

The correct answer is letter B. 13.7 millimeters. An object is located 51 millimeters from a diverging lens. The object has a height of 13 millimeters and the image height is 3.5 millimeters.

mi / mo = hi / ho
mi / 51 = 3.5 /13
178.5 = 13 mi
mi = 13.7 mm

Help me on this question? log x-log 9=1

Answers

$\log { x } -\log { 9 } =1\n \n \log { \left( \frac { x }{ 9 } \right) } =1\n \n \log _( 10 ){ \left( \frac { x }{ 9 } \right) } =1\n \n { 10 }^( 1 )=\frac { x }{ 9 } \n \n 9\cdot 10=x\n \n x=90$

This is because:

$\log _( a ){ \left( \frac { x }{ p } \right) } \n \n =\log _( a ){ \left( \frac { { a }^( m ) }{ { a }^( n ) } \right) } \n \n =\log _( a ){ \left( { a }^( \left( m-n \right) ) \right) } \n \n =\left( m-n \right) \cdot \log _( a ){ a } \n \n =m-n\n \n =\log _( a ){ x } -\log _( a ){ p } \n$

   log(x) - log(9) = 1

Subtracting the logs of numbers gives you the log of
the quotient of the numbers.

   Log(x) - log(9) is the log of (x/9).

So the equation says: log (x/9) = 1

Raise 10 to the power of each side: 10^(log of x/9) = 10^1

But 10^(log of x/9) is x/9, and 10^1 is 10.

So x/9 = 10

   x = 90

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A worker kicks a flat rock lying on a roof. The rock slides up the incline 10.0 m to the apex of the roof, and flies off the roof as a projectile. What maximum height (in m) does the rock attain? Assume air resistance is negligible, vi = 15.0 m/s, μk = 0.425, and that the roof makes an angle of θ = 42.0° with the horizontal. (Assume the worker is standing at y = 0 when the rock is kicked.)

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Which behavior of light makes it possible for you to see a spectrum of colors in a spray of water on a sunny day? diffusion