All categories

3 years ago

How does the area of 0.3 m2 of iron change when heated from 20 ° C to 60 ° C?

Physics

1 answer:

DerKrebs [107]3 years ago

6 0

Answer:

The quantitative relationship between heat transfer and temperature change contains all three factors: Q = mcΔT, where Q is the symbol for heat transfer, m is the mass of the substance, and ΔT is the change in temperature. The symbol c stands for specific heat and depends on the material and phase. The specific heat is the amount of heat necessary to change the temperature of 1.00 kg of mass by 1.00ºC. The specific heat c is a property of the substance; its SI unit is J/(kg ⋅ K) or J/(kg ⋅ ºC). Recall that the temperature change (ΔT) is the same in units of kelvin and degrees Celsius. If heat transfer is measured in kilocalories, then the unit of specific heat is kcal/(kg ⋅ ºC).

Explanation:

You might be interested in

Which of the following does notaccurately describe the forces that exist with an atom?

natima [27]

The believe the answer to this is B

8 0

3 years ago

Understand how to apply the equations for 1-dimensional motion to the y and x directions separately in order to derive standard

dexar [7]

Answer:

the equations of motion can be separated into an equation that depends on a single variable.

Explanation:

he one-dimensional kinematics equations can be applied to two-dimensional systems because we can write the equations in such a way that each one of them depends on variables in a single dimension plus time, which, because it is a scalar, can be used in all dimensions.

A mathematical way of saying this is that the equations of motion can be separated into an equation that depends on a single variable.

8 0

3 years ago

The coefficient of static friction between car's tires and a level road is 0.80 If car to be stopped in time of 3.0 sec its spee

Vlad1618 [11]

Answer:

23.5 m/s

Explanation:

The velocity of the car in decelerated motion is given by

v = u + at

where

v = 0 is the final velocity

u is the initial velocity

a is the acceleration of the car

t = 3.0 s is the time it takes for the car to stop

The acceleration of the car is given by the frictional force, which is the only force acting on the car along the direction of motion, so:

$ma = -\mu mg\\a = -\mu g = -(0.80)(9.8 m/s^2)=-7.84 m/s^2$

where

$\mu=0.80$ is the coefficient of friction

Solving the previous equation for u, we find the initial velocity:

$u=v-at=0-(-7.84 m/s^2)(3.0 s)=23.5 m/s$

4 0

4 years ago

A planet has a circular orbit around a star. It is a distance of 53,000,000 km from the centre of the star.

Kipish [7]

Answer:

it takes 365 days to revolve around the star(sun)

5 0

3 years ago

How many square meters are in 1330 square feet

andriy [413]

There are 123.56 of them. (rounded)

5 0

4 years ago

How does the area of ​​0.3 m2 of iron change when heated from 20 ° C to 60 ° C?

How does the area of 0.3 m2 of iron change when heated from 20 ° C to 60 ° C?