Matty told Harriet that, later that same day, he was going to try to convince her to change her attitude toward the nutritional merits of doughnuts. Based on research findings regarding persuasion, how effective is Matty's strategy?

The correct answer is - not very effective; forewarning tends to reduce the effectiveness of an attitude change

Explanation:

The strategy of forewarning or warning before attempting any change in the psychology of an individual is found to be less effective. The subject sees a  forewarning seen as a warning that a person is going to attempt to make changes in the attitude of a person about a particular thing or situation.

As a result, the person is ready to defenses up with regard to that idea of persuasion which Builds up defenses for the situation. Therefore, the effect of persuasion is reduced on the person.

Thus, Matty's strategy is not very effective; forewarning tends to reduce the effectiveness of an attitude change

Density is a value for mass, such as kg, divided by a value for volume, such as m3. density is a physical property of a substance that represents the mass of that substance per unit volume. to calculate for the density of the unknown metal, we simply divide the mass of the substance by the volume measured. we do as follows:

density = mass / volume
density = 222.50 g / 25 ml
density = 8.9 g/ml

therefore, the correct answer would be the third option. the density of the unknown metal would be 8.9 grams per milliliter. it would have a high density as expected since it is a metal and it would occupy a small space but would have a heavy mass.