Let's convert the quantities in SI units first.
The force exerted by the horse is
and the distance covered is
Therefore, the work done by the horse is equal to the product between the force applied and the distance:
Answer:
22425 J
Explanation:
From the question,
Applying
Q = cm(t₂-t₁).................. Equation 1
Where Q = Thermal Energy, c = specific heat capacity of aluminium, m = mass of aluminium, t₂ = Final Temperature, t₁ = Initial Temperature.
Given: c = 897 J/kg.K, m = 1.0 kg, t₁ = 50 °C, t₂ = 25 °C (The final temperature is reduced by half)
Substitute these values into equation 1
Q = 897×1×(25-50)
Q = 897×(-25)
Q = -22425 J
Hence the thermal energy lost by the aluminium is 22425 J
Because reliable conclusions are trustworthy and applicable.
Reliable is officially defined as being "able to be trusted to do or provide what is needed." and has been clearly shown in context of the first statement. Being interesting is not always a quality of something with reliability as what the second statement suggests. Also, reliable conclusions are always a part in scientific endeavor.
Unbalanced force.
The definition of an unbalanced force is a force that changes the position, speed or direction of the object to which it is applied.
When an object is still it means that is is balanced force. So you would need to add more force to another side to make it move. Which is unbalanced force.
False. the first law describes inertia
