An object with weight W is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rope makes an angle with a plane, then the magnitude of the force is F W sin 1 cos where is a constant called the coefficient of friction. For what value of is F smallest?
Different types of stains 1. Simple stain 2. Differential stain 3. Structural stain Simple stain- visual representation of bacteria Differential stain: Differentiates different types of bacteria. Example- Gram stain and acid fast stain. Structural stain: Provides information about the structure of the bacterial cell. Example- Capsule stain and Endospore stain. Gram stain Developed by Dr. Hans Christian Gram (Danish Bacteriologist, Developed in 1884) Mainly based on differences in cell wall construction of Gram positive and Gram negative bacteria. Can be used for initial identification of bacteria in clinical settings. o Different properties of bacteria such as resistance to antibiotics or