An astronaut lands on an alien planet. he places a pendulum (l = 0.300 m) on the surface and sets it in simple harmonic motion, as shown in this graph. a. what is the period and frequency of the pendulum’s motion? b. how many seconds out of phase with the displacements shown would graphs of the velocity and acceleration be? c. what is the acceleration due to gravity on the surface of the planet in m/s2? determine the number of g-forces. show any necessary calculations.

Assuming weightless pulleys and 100% efficiency, what is the minimum input force required to lift a 120 n weight using a single fixed pulley?

Consider a system with two masses that are moving away from each other. why will the kinetic energy differ if the frame of reference is a stationary observer or one of the masses?

Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer