What is the efficiency of the bicycle if you put 10 joules of work into it and the bicycle does 8.5 joules

what device is made of coils of wire with an electrical current passing through it in order to generate a magnetic field

Which of the following is supportive evidence of the big bang theory? pulsars the different shapes of galaxies cosmic microwave background radiation galactic clusters

Emily jogs 3 laps at the track to warm up. She jogs at 5 mph. Then she runs 3 more laps at 7 mph. What is true about her average speed and her average velocity?

Suppose a car is traveling in the negative x-direction and comes to a stop. What is the sign of that car's acceleration? How do you know?

Match these items . 1. first nuclear reactor Fermi 2. atomic mass 3. splitting of nuclei into lighter elements neutron 4. number of neutrons and protons Becquerel 5. builds heavier elements fission 6. discovered radioactivity curie 7.

Why is raw sewage a major pollutant in some countries but not in developed countries?

What is the momentum of a 2 kg ball traveling at 2m/s

A constant force is exerted for a short distance on a block of mass that is initially at rest on a horizontal frictionless plane. This force gives the block a certain final speed v.

A football quarterback is moving straight backward at a speed of 3.00 m/s when he throws a pass to a player 20.0 m straight downfield. (a) if the ball is thrown at an angle of 25.

Simone is walking her dog on a leash. The dog is pulling with force of 34 N to the right and simone is pulling backward with a force of 16 N