What event marks the birth of a new star?
What will be an ideal response?
The ignition of nuclear fusion of hydrogen into helium at ten million K.
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The principal difference between the terrestrial and jovian planets is the absence of ________ and helium close to the Sun
Fill in the blank(s) with correct word
Conversion of Units: The tank of a certain car holds 16 gallons of gasoline. (1.00 gal = 3.785 L)(a) How many liters of gasoline does this tank hold?(b) How many kilometers can the car travel on one tank if it gets 25 miles per gallon?
Fill in the blank(s) with the appropriate word(s).
A 50-gram superball traveling at 25.0 m/s is bounced off a brick wall and rebounds at 22.0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3.50 ms, what is the average acceleration of the ball during this time interval?
What will be an ideal response?
A sled is on a horizontal surface and a rope with tension T is pulling on it at an angle ? above the horizontal. The sled had mass M and does not move due to the frictional force. In this case the coefficient of friction is ?s. In terms of the variables given and g, what is the magnitude of the frictional force in this case?
a. ?sMg b. Tcos? c. Tsin? d. ?sMgcos?