<span>Fireworks are a great example of colorful light emissions. When the firework is ignited, it causes light to pass through different metal salts (calcium chloride, sodium nitrate, etc), creating the color of red, blue, white and green.</span>
The answer is to retain the balance pan clean and to keep chemicals from mixing with other chemicals. Also some chemicals can respond with the metal of the balance pan and cause it to oxidize or corrode. Each time you use the balance pan, use weighing paper or a small dish or beaker to weigh out chemicals.
Answer:
v = 5.6 m/s
Explanation:
Given,
The mass of the car, m = 1500 kg
The kinetic energy of the car, K.E = 23,500 J
The kinetic energy of the of an object is given by the relation,
K.E = ½ mv²
Substituting the given values in the equation,
23,500 = ½ x 1500 x v²
v² = 23500/ 750
= 31.33
v = 5.6 m/s
Hence, the K.E of the car is, v = 5.6 m/s
