Sometimes the tar of a newly paved road gets sticky on a very hot summer day. What causes this?

A motorist is traveling at 20 m/s. He is 60 m from a stoplight when he sees it turn yellow. Is reaction time, before stepping on the brake, is 0.50 s. What steady acceleration (slowing down) while braking will bring him to a stop right at the light?

Earth's magnetic north pole and its geographical north pole are which of the following? in the same location close to each other but in different locations very far apart both located with compasses

Why does the total amount of energy before and after any energy transformations remain the same? answer : Because energy cannot be created or destroyed, the total input is equal to the total output.

What is the significance of the boundary of an electron cloud?

Michael tells Sara he weighs 104 pounds. Sara says she is 44 kilograms. If there are 2.2 pounds in a kilogram, who is heavier?

Does water expand more as the temperature drops even more below 0 deg? I am worried about the coolant in my rad. as the temp. is 40deg below.

A 1.00-kilogram ball is dropped from the top of a building. just before striking the ground, the ball's speed is 12.0 meters per second.

Why oil does not dissolve in water?

Which element has the highest number of protons? a. Calcium b. Argon c. Xenon d. Radon

Which are the most common producers in aquatic ecosystems? a - bacteria b - algae c - fish d - plants