Saturn radiates 1.8 times as much energy as it receives from the Sun
a. True
b. False
Indicate whether the statement is true or false
True
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Constant Acceleration Kinematics: At the instant a traffic light turns green, a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. At that moment a truck traveling with a constant velocity of 15.0 m/s overtakes and passes the car.(a) Calculate the time necessary for the car to reach the truck.(b) Calculate the distance beyond the traffic light that the car will pass the truck.(c) Determine the speed of the car when it passes the truck.
What will be an ideal response?
It was once thought that a "black hole" absorbed all the radiation falling upon it and radiated none
If this were true, what would one infer the temperature of a black hole to be? Actually Stephen Hawking discovered that black holes have a VERY small probability of radiating. Modifying your first answer, would you now infer a large or small temperature for a black hole.?
The Gateway Arch in St. Louis is approximately 193 meters tall. What is its height in feet?
A) 58.8 feet B) 64.3 feet C) 633 feet D) 759 feet E) 7,590 feet
An ice chest (see sketch) is to be constructed from Styrofoam [k = 0.033 W/(m K)]. If the wall of the chest is 5-cm-thick, calculate its R-value in (m2 K)/(W cm).
GIVEN
- Ice chest constructed of Styrofoam, k = 0.0333 W/(m K)
- Wall thickness 5 cm
FIND
(a) R-value of the ice chest wall
ASSUMPTIONS
(a) One-dimensional, steady conduction
SKETCH
