What causes a regular reflection?

a. light waves strike a rough, uneven surface at a 45 degree angle and are reflected back at a 90 degree angle.

b. parallel light waves strike a smooth, polished surface and reflect back in the same direction.

c. parallel light waves strike a rough, uneven surface and reflect in different directions.

d. light waves strike a smooth, polished surface at a 90 degree angle and are reflected back at a 45 degree angle.

•• al and bert are jogging side-by-side on a trail in the woods at a speed of 0.75 m/s. suddenly al sees the end of the trail 35 m ahead and decides to speed up to reach it. he accelerates at a constant rate of 0.50 m/s2, while bert continues on at a constant speed. (a) how long does it take al to reach the end of the trail? (b) once he reaches the end of the trail, he immediately turns around and heads back along the trail with a constant speed of 0.85 m/s. how long does it take him to meet up with bert? (c) how far are they from the end of the trail when they meet?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

4. a 75.0 g piece of ag metal is heated to and dropped into 50.0 g of water at the final temperature of the mixture is what is the specific heat capacity of silver? 5. a 465 g chunk of iron is removed from petrucci, ralph h.. general chemistry (p. 290). pearson education. kindle edition.