The most cost effective way to reduce heat loss from a window is ________
a. add a storm window
b. install a triple pane window
c. weatherstrip around the outside perimeter of the window
d. install a thermal drape
c
You might also like to view...
Which of the following describes the most convincing evidence in support of the idea that human activity is causing climate change on Earth?
A) Polls show that a majority of Americans agree that this is the case. B) The vast majority of scientists say so. C) The known science behind the greenhouse effect predicts that warming should be occurring as the carbon dioxide concentration rises, and the average temperature is rising as expected. D) There is no other known process besides the burning of fossil fuels that can lead to any change in Earth's average temperature.
A roller-coaster car has a mass of 500 kg when fully loaded with passengers. At the bottom of a circular dip of radius 40 m (as shown in the figure) the car has a speed of 16 m/s. What is the magnitude of the force of the track on the car at the bottom of the dip?
a.
3.2 kN
b.
8.1 kN
c.
4.9 kN
d.
1.7 kN
e.
5.3 kN
A carousel that is 5.00 m in radius has a pair of 600-Hz sirens mounted on posts at opposite ends of a diameter. The carousel rotates with an angular velocity of 0.800 rad/s. A stationary listener is located at a distance from the carousel
The speed of sound is 350 m/s. The maximum beat frequency of the sirens at the position of the listener is closest to A) 6 Hz. B) 8 Hz. C) 10 Hz. D) 12 Hz. E) 14 Hz.
The sound of a band is rated as 60 dB at a distance of 10.0 m. What is the dB sound level of the band when one is 20.0 m from the band?
A. 56 dB B. 54 dB C. 52 dB D. 50 dB E. 48 dB