How would you go about these Physics Questions?

1) For the highest accuracy would you choose an aluminum or a steel tape rule for your round outdoor use? Why?2) A circular hole is cut through a flat aluminum plateA spherical brass ball has a diameter that is slight smaller than the diameter of the holeThe plate and the ball have the temperature at all timesShould the plate and ball bot be heated or both be cooled ot prevent the ball from falling through the hole? Give your reasoning.3) When the bulb of a Mercury in glass thermometer is inserted into boiling water the mercury column first drops slight before it beings to riseAccount for this phenomenon.4) Two different objects are supplied with equals amount of heatgive reasons why their Temperature changes would not necessarily be the same.5) A camping stove is used to boil water on a mountain Does it necessarily follow that same stove can boil at lower altitude such as at sea level? Provide a reason for your answer.

this is my fav! warning: delicious chocolate chip banana bread A flavorful banana bread recipe with chocolate chips, from MitziINGREDIENTS: 1 cup granulated sugar 4 ounces butter, softened 1 1/2 cups mashed bananas 2 large eggs 2 teaspoons vanilla extract 2 cups all-purpose flour 1 1/2 teaspoons baking powder 1 teaspoon baking soda 1/2 teaspoon salt 1 cup semisweet chocolate chips PREPARATION: Cream sugar and butter; beat in the mashed bananas, eggs, and vanillaCombine dry ingredients and stir into the first mixture just until moistened Fold in chocolate chips until well incorporatedPour batter into greased and floured 9x5x3-inch loaf panCover loosely with a tent of aluminum foilBake at 325° for 30 minutesRemove foil and continue baking for 3o to 40 minutes or until wooden pick inserted tests doneCool for 10 minutes, remove from pan and cool banana bread completely before slicingShared by Mitzi

here it isChocolate Banana Bread Ingredients: 1 cup Butter, room temperature 2 cups Sugar 2 teaspoons Vanilla extract 4 Eggs 2 1/2 cups Flour 1/2 cup Baking cocoa 2 teaspoons Baking soda 1 teaspoon Salt 4 Ripe bananas, mashed 1 cup Sour cream 1 cup Milk chocolate chips Preparation: Cream the butter, sugar and vanilla together Then add the eggs and mix Then put in the dry ingredients and mix well Add the bananas and sour cream and mix Then add in the chocolate chips and pour into 3 greased loaf pans Bake at 350 for 1 hour, or until a toothpick that has been inserted into the center comes out clean

1) Steel has a lower coefficient of thermal expansion (1.3 x 10^-5 per degree C) than aluminum (2.2 x 10^-5 per degree C)Hence the length of a steel tape will change less as outdoor temperatures varySteel wins2) Brass has a lower coefficient of thermal expansion (1.8 x 10^-5 per degree C) than aluminumSo you should cool the combinationThe hole in the aluminum will shrink slightly more than the ball(Question: if there is a hole in the plate, does it expand or shrink as much as the plate? YesJust imagine the plate is solid and the hole is replaced by a circle drawn on the plate.) 3) Since the heat is supplied from the outside, the glass of the thermometer heats up and expands before the heat is conducted into the mercury4) If the objects are made of the same material, the larger one receives fewer calories per gram and so heats up less than the lighter oneIf they weigh the same but are of different materials, the one with the higher specific heat warms up lessIf they are of different weight and of different material, the temperature rise of each is inversely proportional to the product of its (weight x specific heat)5) No, because the boiling point of water is higher at the lower altitude (which means higher atmospheric pressure)The flame of any camp stove is surely hot enough to boil water at any altitude; but the tempthe pot attains is the result of an equilibrium between heat input it receives from the flame and heat loss from radiation, convection and (as the water warms up) evaporation from the water surfaceSo a small flame might be able to heat water to its boiling point at high altitude, but not to the higher temp required at sea level.

this is my fav! warning: delicious chocolate chip banana bread A flavorful banana bread recipe with chocolate chips, from MitziINGREDIENTS: 1 cup granulated sugar 4 ounces butter, softened 1 1/2 cups mashed bananas 2 large eggs 2 teaspoons vanilla extract 2 cups all-purpose flour 1 1/2 teaspoons baking powder 1 teaspoon baking soda 1/2 teaspoon salt 1 cup semisweet chocolate chips PREPARATION: Cream sugar and butter; beat in the mashed bananas, eggs, and vanillaCombine dry ingredients and stir into the first mixture just until moistened Fold in chocolate chips until well incorporatedPour batter into greased and floured 9x5x3-inch loaf panCover loosely with a tent of aluminum foilBake at 325° for 30 minutesRemove foil and continue baking for 3o to 40 minutes or until wooden pick inserted tests doneCool for 10 minutes, remove from pan and cool banana bread completely before slicingShared by Mitzi

This is from Hershey's: Chocolate Chip Banana Bread Ingredients: 2 cups all-purpose flour 1 cup sugar 1 teaspoon baking powder 1 teaspoon salt 1/2 teaspoon baking soda 1 cup mashed ripe banana(2 to 3 medium) 1/2 cup shortening 2 eggs 1 cup HERSHEY'S MINI CHIPS Semi-Sweet Chocolate Chips 1/2 cup chopped walnuts Directions: 1Heat oven to 350°FGrease bottom only of 9x5-inch loaf pan 2Combine all ingredients except small chocolate chips and walnuts in large bowl; blend well on medium speed of mixerStir in small chocolate chips and walnutsPour batter into prepared pan 3Bake 60 to 65 minutes or until wooden pick inserted in center comes out cleanCool 10 minutes; remove from panCool completely on wire rack1 loaf (18 servings) VARIATION: HERSHEY'S Milk Chocolate Chips or HERSHEY'S Semi-Sweet Chocolate Chips may be substituted for small chocolate chips.

Chocolate Chip Banana Bread INGREDIENTS 1 cup shortening 2 cups white sugar 2 eggs 2 tablespoons mayonnaise 6 very ripe bananas, mashed 3 cups all-purpose flour 1/2 teaspoon salt 1 teaspoon baking powder 2 teaspoons baking soda 1 cup semi-sweet chocolate chips 1/2 cup chopped walnuts DIRECTIONS Preheat oven to 350 degrees F (175 degrees C)Lightly grease two 9x5 inch loaf pansIn a large bowl, cream together the shortening and sugar until light and fluffyStir in the eggs one at a time, beating well with each additionStir in the mayonnaise and bananasStir together the flour, salt, baking powder and baking sodaBlend the flour mixture into the banana mixture; stir just enough to evenly combineFold in the chocolate chips and walnutsBake at 350 degrees F (175 degrees C) until a toothpick inserted into the center of the loaf comes out clean, about 50 to 75 minutesCool loaf in the pan for 20 minutes before removing to a wire rack to cool completely

This is from Hershey's: Chocolate Chip Banana Bread Ingredients: 2 cups all-purpose flour 1 cup sugar 1 teaspoon baking powder 1 teaspoon salt 1/2 teaspoon baking soda 1 cup mashed ripe banana(2 to 3 medium) 1/2 cup shortening 2 eggs 1 cup HERSHEY'S MINI CHIPS Semi-Sweet Chocolate Chips 1/2 cup chopped walnuts Directions: 1Heat oven to 350°FGrease bottom only of 9x5-inch loaf pan 2Combine all ingredients except small chocolate chips and walnuts in large bowl; blend well on medium speed of mixerStir in small chocolate chips and walnutsPour batter into prepared pan 3Bake 60 to 65 minutes or until wooden pick inserted in center comes out cleanCool 10 minutes; remove from panCool completely on wire rack1 loaf (18 servings) VARIATION: HERSHEY'S Milk Chocolate Chips or HERSHEY'S Semi-Sweet Chocolate Chips may be substituted for small chocolate chips.

Chocolate Chip Banana Bread INGREDIENTS 1 cup shortening 2 cups white sugar 2 eggs 2 tablespoons mayonnaise 6 very ripe bananas, mashed 3 cups all-purpose flour 1/2 teaspoon salt 1 teaspoon baking powder 2 teaspoons baking soda 1 cup semi-sweet chocolate chips 1/2 cup chopped walnuts DIRECTIONS Preheat oven to 350 degrees F (175 degrees C)Lightly grease two 9x5 inch loaf pansIn a large bowl, cream together the shortening and sugar until light and fluffyStir in the eggs one at a time, beating well with each additionStir in the mayonnaise and bananasStir together the flour, salt, baking powder and baking sodaBlend the flour mixture into the banana mixture; stir just enough to evenly combineFold in the chocolate chips and walnutsBake at 350 degrees F (175 degrees C) until a toothpick inserted into the center of the loaf comes out clean, about 50 to 75 minutesCool loaf in the pan for 20 minutes before removing to a wire rack to cool completely

here it isChocolate Banana Bread Ingredients: 1 cup Butter, room temperature 2 cups Sugar 2 teaspoons Vanilla extract 4 Eggs 2 1/2 cups Flour 1/2 cup Baking cocoa 2 teaspoons Baking soda 1 teaspoon Salt 4 Ripe bananas, mashed 1 cup Sour cream 1 cup Milk chocolate chips Preparation: Cream the butter, sugar and vanilla together Then add the eggs and mix Then put in the dry ingredients and mix well Add the bananas and sour cream and mix Then add in the chocolate chips and pour into 3 greased loaf pans Bake at 350 for 1 hour, or until a toothpick that has been inserted into the center comes out clean

1) Steel has a lower coefficient of thermal expansion (1.3 x 10^-5 per degree C) than aluminum (2.2 x 10^-5 per degree C)Hence the length of a steel tape will change less as outdoor temperatures varySteel wins2) Brass has a lower coefficient of thermal expansion (1.8 x 10^-5 per degree C) than aluminumSo you should cool the combinationThe hole in the aluminum will shrink slightly more than the ball(Question: if there is a hole in the plate, does it expand or shrink as much as the plate? YesJust imagine the plate is solid and the hole is replaced by a circle drawn on the plate.) 3) Since the heat is supplied from the outside, the glass of the thermometer heats up and expands before the heat is conducted into the mercury4) If the objects are made of the same material, the larger one receives fewer calories per gram and so heats up less than the lighter oneIf they weigh the same but are of different materials, the one with the higher specific heat warms up lessIf they are of different weight and of different material, the temperature rise of each is inversely proportional to the product of its (weight x specific heat)5) No, because the boiling point of water is higher at the lower altitude (which means higher atmospheric pressure)The flame of any camp stove is surely hot enough to boil water at any altitude; but the tempthe pot attains is the result of an equilibrium between heat input it receives from the flame and heat loss from radiation, convection and (as the water warms up) evaporation from the water surfaceSo a small flame might be able to heat water to its boiling point at high altitude, but not to the higher temp required at sea level.