1.- Escribir los siguientes números aplicando la notación científica: a) 5.345.000
b) 0,0000007654
c) 0,000231
d) 12.025.000.000
e) 0,00000000000000016
f) 1.300
g) 45.000

2.- Realizar las siguientes operaciones sin usar calculadora y aplicando propiedades de los exponentes:
a) 1,2 x 104
+ 0,5 x 105
- 24,5 x 103
=
b) (13,2 x 104
) x (2 x 105
) =
c) (0,0076 x 108
) x (2 x 10-6
) =
d) 1,37 x 104
– 251,3 x 102
=
e) (3,43 x 109
) 1/3 =
f) 7,5 x 106
/ 2,5 x 103=

3.- Efectuar los siguientes cambios de unidades (expresando con notación científica cuando sea posible):
a) 10 d 5 h 20 min a s.
b) 1 año a s. (considerar 1 año = 365.25 días)
c) 30 m a km
d) 55 m2
a cm
2
e) 2 cm a km
f) 20 m a km
g) 23 km2
a m
2
h) 8 d 5 h 10 min a s
i) 33 dm3
a mm
3
j) 5 mm2
a dm2
k) 1 año Luz a km (considerar la velocidad de la luz “c”
igual a 3 x 105
km/s)

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

Your starship, the aimless wanderer, lands on the mysterious planet mongo. as chief scientist-engineer, you make the following measurements: a 2.50-kg stone thrown upward from the ground at 14.0 m/s returns to the ground in 5.70 s ; the circumference of mongo at the equator is 2.20×10^5 km ; and there is no appreciable atmosphere on mongo. (a) the starship commander, captain confusion, asks for the following information: what is the mass of mongo? (b) if the aimless wanderer goes into a circular orbit 2.20×10^4 km above the surface of mongo, how many hours will it take the ship to complete one orbit? (c) an unmanned spacecraft is in a circular orbit around the moon, observing the lunar surface from an altitude of 44.0 km . to the dismay of scientists on earth, an electrical fault causes an on-board thruster to fire, decreasing the speed of the spacecraft by 23.0 m/s . if nothing is done to correct its orbit, with what speed (in km/h) will the spacecraft crash into the lunar surface?