 # How do you find joules lost by water?

## How do you find joules lost by water?

Multiply the change in temperature by the specific heat capacity and the mass of your object. This will give you the heat lost or gained in joules. Example: If 10 kilograms of water are heated from 10 degrees Celsius to 50 degrees Celsius, how much energy (in joules) did they absorb?

## How many joules does it take to move a car?

Travelling at 100 kilometres per hour, it has approximately 770,000 joules of kinetic energy. If this vehicle collided with a concrete wall, it would deform, transferring some of its kinetic energy into the concrete molecules.

## How does speed affect kinetic energy?

It turns out that an object’s kinetic energy increases as the square of its speed. A car moving 40 mph has four times as much kinetic energy as one moving 20 mph, while at 60 mph a car carries nine times as much kinetic energy as at 20 mph. Thus a modest increase in speed can cause a large increase in kinetic energy.

## How much power is required to move a car?

Accounting that the weight is 1200kg and power to overcome friction is four times that of a 300kg vehicle, about 1.2kW are needed simply to overcome friction. This also means, about 2kW are needed to overcome air drag.

## How much torque is needed to move a person?

Even at 0.020 (more likely for little scooter wheels), that’s only 3.2 lbs. The force needed to accelerate is F=MA; a moderate acceleration rate is about 0.1g, which means that you’ll need 16 lbs of force to achieve that.

## What is running resistance of the vehicle?

What is running resistance of the vehicle? Explanation: Running resistance is the sum of rolling and aerodynamic resistance. Frunning = Frolling + F aerodynamic = (μk * mvehicle * g) + (0.5 * ρ * Cdrag * Afront * V2). It is the resistance that will affect when the vehicle is running.