If energy is transferred spontaneously as heat from a substance with a temperature of T1 to a substance with a temperature of T2, which of the following statements must be true? 1-T1 < T2

2-T1 = T2

3-T1 > T2

4-more information is needed

The statement must be true.

Explanation:

As it is given that heat is being transferred from a substance with temperature to a substance with temperature .

It is known that heat will always being transferred from a higher temperature to a lower temperature. Because at higher temperature the molecules of a substance acquire more energy and when they lose energy then a decrease in temperature occurs.

Hence, in the given situation .

Thus, we can conclude that the statement must be true.

scientific laws are the result of testing theories and proving them to be facts.

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west