During a reaction, an element loses 4.8 × 10-28 kg of mass. How much energy (in Joules) is released?
A) 4.3 × 10-11 J
B) 1.4 × 10-19 J
C) 1.6 × 10-36 J
D) 2.1 × 10-40 J
E) 5.3 × 10-45 J
A
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You observe a 1-cm-long crack in the middle of the glass windshield of your car. Compare the expected fracture strength of your defective glass windshield to that of a new one that has a tensile fracture strength of 69 MPa. Assume that the KIc of glass is 0.84 MPa?m1/2.
What will be an ideal response?
Which of the following is not a carbohydrate?
a. Maltose b. Glucose c. Fructose d. Glyceryl tristearate
What produces the 21-cm line that we use to map out the Milky Way Galaxy?
A) atomic hydrogen B) ionized hydrogen C) molecular hydrogen D) carbon monoxide E) helium
The observed distribution of matter in the Universe is best understood as being caused by ____
a. clumping of dark matter in the early Universe causing clumping of normal matter b. clumping of normal matter in the early Universe causing clumping of dark matter c. simultaneous clumping of normal and dark matter d. large variations in the intensity of the cosmic microwave background e. homogenous expansion of normal and dark matter