On a high way a car is driven 80 km the first 1 he of travel, 50km during the next 0.5 he, and 40 km in the final 0.5 hr. What is the cars average speed for the entire trip?

Why do streets and highways have speed limits rather than velocity limits?

Which quantity is measured as electrical power? the time rate of energy transfer the net amount of energy transferred into a circuit the number of charges flowing in a conductor per unit time the amount by which a circuit element slows the flow of

To find amplitude, measure

What must the charge (sign and magnitude of a particle of mass 1.48 g be for it to remain stationary when placed in a downward-directed electric field of magnitude 640 n/c? use 9.81 m/s2 for the magnitude of the acceleration due to gravity?

shows two blocks connected by a cord (of negligible mass) that passes over a frictionless pulley (also of negligible mass). The arrangement is known as Atwood's machine. One block has mass m1 = 1.30 kg; the other has mass m2 = 2.80 kg.

Which of these factors will increase the speed of a sound wave in the air

After a long day of foraging, a squirrel drops a nut from a tree. which correctly describes the nut's motion? a. the nut experiences balanced forces and accelerates. b. the nut experiences unbalanced forces and accelerates. c.

Find the magnitude of the force needed to accelerate a 280 g mass with a⃗ = - 0.170 m/s2 i^+0.450 m/s2 j^.

How is heat energy transferred from a warm object to a cold object there is direct contact? A. by radiation B. by conduction C. by the sun D. by convection

What was the year and location of james chadwick's experiment?