Does the First Law of Thermodynamics imply a directionality in nature?

Which would you use with a circuit to determine if a magnet was moving in close proximity to the circuit? - galvanometer - electronic balance - thermometer

What is the degree of precision of this ruler? cm

Diagnostic ultrasound of frequency 3.45 MHz is used to examine tumors in soft tissue. (a) What is the wavelength in air of such a sound wave? (b) If the speed of sound in tissue is 1500 m/s, what is the wavelength of this wave in tissue?

What is the period of a sound wave having a frequency of 340hz?

If a car is traveling on the highway at a constant velocity, the force that pushes the car forward must be A. equal to the weight of the car. B. less than the force of friction exerted upon the car. C.

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.