: Suppose the PASCO Motion Sensor is calibrated to give correct measurements of position at 20o C, but the actual temperature in the lab room is 22o C. The Motion Sensor works by timing how long a pulse of sound takes to go from the sensor to the cart and back to the sensor, and at 20o C, the speed of sound is 343.15 m/s, but at 22o C, the speed of sound is 344.31 m/s. What effect does this difference in the speed of sound make, and what kind of error is this

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.

En un laboratorio, nakisha mezcla una solución de hidróxido de sodio con un indicador llamado fenolftaleína. cuando se combinan, crean una solución de color rosa. nakisha se pregunta si la mezcla de otras soluciones con fenolftaleína también creará este color rosa. ? cómo podría nakisha utilizar el proceso de investigación científica para determinar si la mezcla de otras soluciones con fenolftaleína también creará un color rosa? marque las que correspondan.