A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What are the maximum speed and maximum acceleration of the tip of the needle?

A ball is thrown horizontally from the top of a tower at the same instant that a stone is dropped vertically. Which object is traveling faster when it hits the level ground below if neither of them experiences any air resistance.

What is the primary function of a centrifuge in the clinical laboratory?

On a cold day, you take in 4.2 L of air into your lungs at a temperature of 0 degrees Celsius. If you hold your breath until the temperature of the air in your lungs reaches 37 degrees, what is the volume of the air in your lungs at that point, assuming the pressure does not change?

Grandfather clocks are designed so they can be adjusted by moving the weight at the bottom of the pendulum up or down. Suppose you have a grandfather clock at home that runs slow. Which of the following adjustment of the weight would make it more accurate? 

If a floating log is seen to bob up and down 15 times in 1.0 min as waves pass by you, what are the frequency and the period of the wave?

A bucket is being lowered by a very light rope with a constant downward velocity. the tension in the rope must be

When should hand hygiene be performed?

A pilot drops a package from a plane flying horizontally at a constant speed. Neglecting air resistance, when the package hits the ground the horizontal location of the plane will

Which laboratory professional is primarily responsible for performing complex tests and analyzing results?