The intensity of light received at a source varies inverselyas the square of the distance from the source. A particularlight has an intensity of 20 foot-candles at 15 feet. What is the light’s intensity at 10 feet?
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
The intensity of light received at a source varies inversely
as the square of the distance from the source. A particular
light has an intensity of 20 foot-candles at 15 feet. What is the
light’s intensity at 10 feet?
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