You see a penny lying on the ground. a penny won't buy much these days, so you think: "if i bend down to pick it up i will do work. to do that work i will have to burn some energy. it probably costs me more to buy the fuel (food) to provide that energy than i would gain by picking up the penny. it's not cost effective." you pass it by. show answer no attempt is the argument correct? estimate the energy cost for picking up a penny. you may find the following information useful: a jelly donut contains about 250 calories (1 calorie = 1 kcal).

(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

What is the power rating of the lightbulb if 3.0 a flow through it when connected to a 15 v battery