50 J of work was performed in 20 seconds. How much power was used to do this task? A. 4 W B. 24.5 W C. 0.4 W D. 2.5 W

A small car collides with a large truck is the magnitude of the force experience by the car greater than less than or equal to the magnitude of the force experience by the truck

Which of the following stars would be the most luminous? 2. Yellow star 3. Red star 4. Blue star 5. Orange star

Whenever you watch a high-flying aircraft overhead, it seems that its sound comes from behind the craft rather than from where you see it. Why is this?

If you were asked to describe metals and magnetism you could say that All metals are attracted to magnets because they are able to create their own magnetic field. all metals are attracted by magnets; this is why we call metals ferromagnetic.

A spring with k = 500 N/m stores 704 J. How far is it extended from the equilibrium position

Match the term to the correct description. ~A type of circuit where part of the loop is broken. ~The flow of electrons. ~A loop that creates a pathway for electricity to follow. ~A type of circuit with only one path for the electricity to follow.

What is the mass of an object that is accelerating at 10 m/s^2 when a force of 2,386 N is exerted

According to the U. S. Green Building Council, what percentage of the world's energy use and greenhouse gas emissions can be attributed to buildings?

Magnets are often fitted to the doors of refrigerators and cupboards WHY?

Which data set has the smallest standard deviation? A. 7, 8, 89, 1005, 23400, 5, 3 B. 1000, 1001, 1002, 1000, 1001, 1001 C. 55, 90, 34, 78, 15, 20, 19 D. 1, 9, 120, 9, 1, 1, 9