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Majoring in physics with a concentration in astrophysics. I love building computers, running, and listening to music!

Radiocarbon Dating. A sample from timbers at an archeological site containing 500 g of carbon provides 3070 decays/min. What is the age of the sample?

SSM A skateboarder, starting from rest, rolls down a 12.0-m ramp. When she arrives at the bottom of the ramp her speed is 7.70 m/s.(a) Determine the magnitude of her acceleration, assumed to be constant.(b) If the ramp is inclined at 25.0 with respect to the ground, what is the component of her acceleration that is parallel to the ground?

MMH The earth moves around the sun in a nearly circular orbit of radius $1.50 \times 10^{11} {m}$ During the three summer months (an elapsed time of $7.89 \times 10^{6} {s} )$ the earth moves one-fourth of the distance around the sun. (a) What is the average speed of the earth? (b) What is the magnitude of the average velocity of the earth during this period?

SSM A volleyball is spiked so that it has an initial velocity of 15 m/s directed downward at an angle of 55 below the horizontal. What is the horizontal component of the ballâ€™s velocity when the opposing playerfields the ball?

A skateboarder shoots off a ramp with a velocity of 6.6 m/s, directed at an angle of 58 above the horizontal. The end of the ramp is 1.2 m above the ground. Let the x axis be parallel to the ground, the y direction be vertically upward, and take as the origin the point on the ground directly below the top of the ramp. (a) How high above the ground is the highest point that the skateboarder reaches? (b) When the skateboarder reaches the highest point, how far is this point horizontally from the end of the ramp?

SSM A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.870 m/s at an angle of 35.0 above the table, and it lands on the magazine 0.0770 s after leaving the table. Ignore air resistance. How thick is the magazine? Express your answer in millimeters.