Over a time interval of 2.04 years, the velocity of a planet orbiting a distant star reverses direction, changing from +18.2 km/s to -22.9 km/s. find (a) the total change in the planet's velocity (in m/s) and (b) its average acceleration (in m/s2) during this interval. include the correct algebraic sign with your answers to convey the directions of the velocity and the acceleration.
Answers: 2
Physics, 22.06.2019 03:30
What makes thermal imaging cameras useful? they can detect differences in color. they can detect differences in wave speeds. they can detect differences in temperature. they can detect mechanical waves.
Answers: 1
Physics, 22.06.2019 03:30
The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.
Answers: 3
Physics, 22.06.2019 03:50
Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.
Answers: 1
Physics, 22.06.2019 19:20
The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?
Answers: 1
Over a time interval of 2.04 years, the velocity of a planet orbiting a distant star reverses direct...
Social Studies, 24.10.2019 01:00
English, 24.10.2019 01:00
Mathematics, 24.10.2019 01:00
Mathematics, 24.10.2019 01:00
Mathematics, 24.10.2019 01:00
Mathematics, 24.10.2019 01:00
History, 24.10.2019 01:00
Chemistry, 24.10.2019 01:00
Chemistry, 24.10.2019 01:00
Mathematics, 24.10.2019 01:00