Physics, 06.10.2019 04:30 vintageandre
Afew years ago, serena williams dived to hit a tennis ball right after it bounced off the ground. the ball bounced on the ground 10.3 m from the net, and after serena hit the ball it flew over the 0.950 m high net and bounced in her opponent's court about 0.970 s after she hit it. if there had been no gravity, the ball would have been 1.36 m higher than the net when it crossed over. how fast was the ball moving when it left serena\'s racket? ignore any effects from ball spin and air resistance.
Answers: 1
Physics, 21.06.2019 16:30
Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )
Answers: 1
Physics, 22.06.2019 12:50
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
Answers: 1
Physics, 23.06.2019 00:20
Abeam of electrons moves at right angles to a magnetic field of 4.5 × 10-2 tesla. if the electrons have a velocity of 6.5 × 106 meters/second, what is the force acting on the electrons? the value of q = -1.6 × 10-19 coulombs.
Answers: 2
Afew years ago, serena williams dived to hit a tennis ball right after it bounced off the ground. th...
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