Midterm 1 Solution

# Midterm 1 Solution - 1 Which is not an energy unit(Choose...

This preview shows pages 1–2. Sign up to view the full content.

A) Cal B) kcal C) kWh D) Btu E) MJ/day 2. Imagine a cold winter morning with a temperature of -5 0 C outside. You're not planning on being in the house during the day. If you turned the thermostat down from 20 0 C to 15 0 C, approximately what percentage of your heating energy do you save? (1 mark) A. 10% B. 20% C. 25% D. 30% E. negligible (below 1%) F. None of the above/something else. 3) Recently, two professional BMX riders performed stunts at UBC with their bicycles. Many of these stunts involve riding up a ramp and getting air-borne (see picture). According to the energy bar diagram, where is the rider? (This is not necessarily the position shown in the picture.) The potential energy is zero at h = 0 and the height scale is indicated. (1 mark) A) At the bottom of the ramp. B) At the top of the ramp. C) Going up the ramp. D) In mid-air going up or down. E) In mid-air at the highest point.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 11/03/2009 for the course PHYS100 100 taught by Professor Lioudmila during the Spring '09 term at UBC.

### Page1 / 3

Midterm 1 Solution - 1 Which is not an energy unit(Choose...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online