Question

zara is at home sick in bed. her mother brings her some soup to eat for lunch, but warms the soup is very hot. zara places the metal spoon into the soup to take a bite but she is interrupted by a phone call from her grandparents asking how she is feeling. after talking to them for a few minutes she goes to pick up the spoon she left in the hot soup and it now feels warm.

part a
after reading the scenario about zaras hot soup, which of the following best explains what happened?
a the spoon and soup both gained energy.
b the soup gained more energy than the spoon lost.
c energy was created in the system.
d the spoon gained energy, and the soup lost the same amount of energy.

part b
which of the following pieces of evidence would best support the claim you chose in part a?
a the type of bowl zaras mom served her soup in.
b the time it took for zara to speak to her grandparents.
c the temperature of the spoon and soup before the spoon is put into the soup.
d the temperature of the spoon and soup after the spoon is put into the soup.
e the distance zaras mom had to walk to bring her the hot soup.

Explanation:

Para la Parte A, según la ley de la conservación de la energía, la energía no se crea ni se destruye, solo se transfiere. Cuando la cuchara metálica fría se introduce en la sopa caliente, la sopa transfiere calor (energía) a la cuchara. La cuchara gana energía térmica y la sopa pierde la misma cantidad de energía térmica. Para la Parte B, la temperatura de la sopa y la cuchara antes y después de la interacción son evidencia de la transferencia de calor, ya que la temperatura de la cuchara aumenta y la de la sopa disminuye.

Answer:

Parte A: D. La cuchara ganó energía, y la sopa perdió la misma cantidad de energía.
Parte B: B. La temperatura de la cuchara y sopa antes de la cuchara ser puesta en la sopa y C. La temperatura de la cuchara y sopa después de la cuchara ser puesta en la sopa.