Which of the above sources do you think is most friendly to the environment? Why? 1. Battery and electric
2. Gasoline/electric or diesel/electric hybrid
3. Hydrogen (combustion)
4. Hydrogen fuel cells
5. Biofuels

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2

Amother used 150 watts of power to raise a 15 newton object in a time interval of 8.0 seconds. through what vertical distance was the object raised ?