Some stove tops are smooth ceramic for easy cleaning. if the ceramic is 0.590 cm thick and heat conduction occurs through an area of 1.31 ✕ 10−2 m2 at a rate of 2271 j/s, what is the temperature difference across it (in °c)? ceramic has the same thermal conductivity as glass and brick.
°c

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

Could someone . i have tried to solve myself but my calculation is off

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.