Abox of mass 1.0 kg compresses a spring of constant k = 1000 n/m. the spring and box are placed on a smooth horizontal surface and the spring is compressed by 15 cm. the box is released and spring relaxes causing the box to move away. the box encounters a rough patch of coefficient of friction μk=0.4 extending 2 meters. how fast is the box moving after it clears that patch?
a. 6.2 m/s
b. 4.7 m/s
c. 2.6 m/s
d. 7.4 m/s

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

What is a possible result of higher air temperature caused by global warming

Match each vocabulary term to its definition. 1. electrons neutral subatomic particles found in the nucleus of the atom 2. neutron lowest energy position of an electron in an atom 3. photon the path of an electron around the nucleus of an atom 4. ground state negatively charged, subatomic particles 5. protons packet of energy of specific size 6. element substance with only one type of atom 7. orbital positively charged, subatomic particles found in the nucleus of the atom