if the old radiator is replaced with a new one made of a material that has twice the thermal conductivity of the material of the old radiator, what should the total surface area available for heat exchange in the new radiator be to achieve the desired temperature gradient? assume that the tubes of the new radiator are as thick as the tubes in the older unit.

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

Suppose a soccer ball is kicked from the ground at an angle 20.0º above the horizontal at 8.00 m/s. the y-velocity is determined to be 2.74 m/s. how long will the ball be in the air? assume the ball lands at the same height at which it was kicked.

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.