Study the list of sentences.
i. if plants are placed under a green light, then they will stay the same height because they will not grow.
ii. if plants are left in a dark room, then they will increase in height because plants do not need light energy to grow.
iii. if plants require carbon dioxide to grow, then plants exposed to more carbon dioxide will grow more quickly.
which option is true about whether the sentences are correctly formatted hypotheses?
a )sentence ii is not a correctly formatted hypothesis because it is factually inaccurate.
b )sentence i is not a correctly formatted hypothesis because it does not explain why green light might affect plant growth.
c )all of the sentences are correctly formatted hypotheses because they all include “if … then …” statements.
d )sentence iii is not a correctly formatted hypothesis because it does not use the word “because.”

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Chapter 23, problem 075 the figure shows a geiger counter, a device used to detect ionizing radiation (radiation that causes ionization of atoms). the counter consists of a thin, positively charged central wire surrounded by a concentric, circular, conducting cylindrical shell with an equal negative charge. thus, a strong radial electric field is set up inside the shell. the shell contains a low-pressure inert gas. a particle of radiation entering the device through the shell wall ionizes a few of the gas atoms. the resulting free electrons (e) are drawn to the positive wire. however, the electric field is so intense that, between collisions with gas atoms, the free electrons gain energy sufficient to ionize these atoms also. more free electrons are thereby created, and the process is repeated until the electrons reach the wire. the resulting "avalanche" of electrons is collected by the wire, generating a signal that is used to record the passage of the original particle of radiation. suppose the radius of the central wire is 24 âµm, the inner radius of the shell 2.3 cm, and the length of the shell 14 cm. if the electric field at the shell's inner wall is 2.8 ă— 104 n/c, what is the total positive charge on the central wire?

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.