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Question of the Day Rules

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- You must work alone
- You may use your textbook today
- You have 10 minutes to complete the QOD
Good luck!!

Read p.105 of your textbook and answer the following questions.

Why is it so important to reduce energy consumption?

Give 3 examples that we can do to reduce our energy consumption in our own homes?

1) Why is it so important to reduce energy consumption?

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Answer: By reducing our energy consumption, we also reduce our impact on the environment. If we reduce our fossil fuel consumption, we generate less greenhouse gas. If we reduce our hydroelectric demands, we help prevent further flooding of land to build new dams.

2) Give 3 examples that we can do to reduce our energy consumption in our own homes?

Answers will vary. Examples: turning off the lights when we leave a room

– turning down the heating at night and when we are away from home

– using energy-efficient appliances

– insulating our homes better.

- Hand in assignment (Nuclear EST)
- Question(s) of the day
- Practice Problem from HW
- Ch. 3 (ST) Test Nov. 12
- Ch. 3 – EST Notes Motion & Forces
- Class work questions
- Get back Chapter 2 Test (EST)

The specific heat capacity corresponds to the amount of thermal energy required to raise the temperature of one gram of a substance by one degree Celsius (p. 74).

Where: change in T = Tf - Ti

- What final temperature will be attained by a 250 ml cup of 10 oC water if it absorbs 1000 J of heat?

1ml = 1g

Note, because water's density = 1g/mL, 250 mL = 250 g

Q = m c ΔT

1000 J = 250(4.19) (x - 10)

x - 10 = 1000 /250/4.19

x - 10 = 0.95

x = 10 .95 oC

- Ravi puts a 100-g block of lead, heated to 155C, in 100 mL of water at 19C. The water temperature rises to 24C. Assuming no energy has been lost to the surroundings, calculate the specific heat capacity of lead.

V = d/Δt

V = average speed (in meters/second)

D = the distance travelled (in meters)

Δt = the travelling time (seconds)

1) What is the average speed of Mr. Meades car that travels 25 km in 14 minutes?

1) What is the average speed of Mr. Meades car that travels 25 km in 14 minutes?

Answer: 25000 meters/840 seconds =

29.76 m/s

What is the answer in km/hour ?

Answer: 107.2 km/hr

Force is measured in Newtons

-Does not matter where the mass is measured.

Jonah has a mass of 78 Kilograms on earth and Jonah has a mass of 78 Kilograms on the moon.

Classwork

From your textbook page 100-101

Numbers: 13, 14, 16, 17, 19

Don’t forget Ch. 3 (ST) Test on November 12

Tutorial on Monday after school

- P.39-40 in your workbook.
- P.99-100 of Textbook 8, 9, 10, 11ab, 12ab