1)Si una onda realiza T oscilaciones en un minuto ¿Cuál es el periodo de este movimiento oscilatorio expresado en segundo? * a) T
b) 60/T
c) T/60
d) 1/T
e) 60 T

2.- Una onda se propaga en cierto medio homogéneo con velocidad V, si la frecuencia se duplica, la velocidad será *

a) v
b) 2v
c) 4v
d)v/2

3) Una onda mecánica viaja a través de un medio elástico y las vibraciones de las partículas individuales son paralelas a la dirección de propagación (movimiento) de la onda, esta onda se llama. *

a) Longitudinal
b) Electromagnetica
c)Transversal
d) Unidimensional

4) Una onda realiza 10 ciclos completos por segundo. Entonces el valor de su frecuencia es: *
a)1 punto
b)10 Hz
c)0,1 Hz
d)10 segundos
e)0,1 segundos

5)Una onda viajera tiene un periodo de 2,5 segundos. Se pide determinar su frecuencia. *
a)1 punto
b)2,5 Hz
c)0,4 Hz
d)0,4 segundos
e)2 segundos

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Need asap ! what is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? (2 points) as air pressure in an area increases, the density of the gas particles in that area decreases. as air pressure in an area increases, the density of the gas particles in that area increases. as air pressure in an area increases, the density of the gas particles in that area remains constant. as air pressure in an area increases, the density of the gas particles in that area increases and decreases in an alternating pattern. 3. which of the following correctly describes a way in which earth's atmosphere interacts with the geosphere? (2 points) it contains gases that living organisms breathe. it contains gases that trap incoming solar radiation. it provides a medium for cycles that provide nutrients to living organisms. it provides a medium for water to move between earth's surface and the air. 4. which of the following is considered a drawback to using wind energy as a source of power? (2 points) wind energy is nonrenewable. wind energy produces large amounts of air pollution. 5. a meteorologist predicts that the weather in a region will soon change from clear skies to probable thunderstorms. prior to making this prediction, what did the meteorologist most likely observe on a barometer? (2 points) the barometer fell slightly. the barometer fell substantially. the barometer rose slightly. the barometer rose substantially. 6. which of the following do meteorologists not typically use weather balloons to record? (2 points) atmospheric pressure cloud types humidity temperature 7. during which step in the can crush lab did water vapor force air from the can? (2 points) the can was filled nearly to the top with water. the can was placed on the hot stove top burner for several minutes. the can was removed from the hot stove top burner. the can was placed upside-down in the water-filled pan.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?