Blog

[2 points] A marble column with a radius of 0.5 meters and height 9.0 meters shortens by 2.4×10-5 meters when a load is placed on it. The elastic modulus of marble is 5.0×1010 N/m2. What is the mass of the load in kg?

Summarize in detail, “The Western Front, October 13-30, 1918” in A Lone Star Reader. 

“Back in the day” compact disk (CD) players would spin CDs at specific angular velocities to read data at different radii on the disk. If the diameter of a CD is 12 cm, and the player is reading data off the edge of the disk at a linear speed of 1.26 m/s, how fast is the CD spinning in revolutions per minute (rpm)?

It’s a sweltering summer day in Gainesville and you are having a water balloon fight. You want the balloons you catch to break so that you get doused in cold water. Which of the following statements best describes why, to achieve this outcome, you should try not to move your hands at all while catching the balloons?

Moving the hand into a palm-up postition

Colonies of Streptococcus pneumoniae appear α-hemolytic on blood agar media. Which one of the following statements explains this discrepancy?

Applying a chemical to the surface of the laboratory bench to remove the contaminating microorganisms is considered:

To be sterilized in an autoclave, infectious medical waste should be:

The coefficient of static friction between the road and the tires of a car is 0.80. What is the maximum speed in km/hr at which the car can take a flat 115-meter-radius curve without slipping?

[2 points] A child of mass 23.6 kg in a boat of mass 36.8 kg is at rest on the water. The child throws a package out horizontally with a speed of 9.46 m/s. The recoil speed of the boat and the child together is 1.07 m/s. What was the mass of the package in kg?