The figure shows the position-versus-time graph of a particle in simple harmonic motion. Its amplitude is 4.8 cm. What is the maximum acceleration of the object? Show your work or explain your reasoning.  

  What is the size of the net electric force on the 1.0 nC charge at the top of the figure? Show your work or explain your reasoning. [answer]

Simplify: 800y59200y11{“version”:”1.1″,”math”:”800y59200y11″}.  Assume y>0{“version”:”1.1″,”math”:”y>0″}. Show your steps.

In the previous question about the motion detector, how long does it take for a pulse that reflects off an object 5.5 m away to make a round trip? Show your work or explain your reasoning.

Simplify: 96w3384w9{“version”:”1.1″,”math”:”96w3384w9″} Assume that w>0{“version”:”1.1″,”math”:”w>0″}. Show your steps.

A concert loudspeaker suspended high off the ground emits 23 W of sound power. A small microphone is 31 m from the speaker. What is the sound intensity at the position of the microphone? Show your work or explain your reasoning.

Simplify: 24-3i-30+22i{“version”:”1.1″,”math”:”24-3i-30+22i”} Show your steps. Write your answer in standard form.

Simplify: -3433{“version”:”1.1″,”math”:”-3433″}

The motion detector used in a physics lab sends and receives 26 kHz ultrasonic pulses of sound waves. A pulse goes out, reflects off the object being measured, and returns to the detector. The lab is at normal room temperature. What is the wavelength of the sound waves emitted by the motion detector? Show your work or explain your reasoning.

Simplify 44-23{“version”:”1.1″,”math”:”44-23″} by rationalizing the denominator. Show your steps.