Plz ! which vector should be negative? question 1 options: any vector whose magnitude is greater than 1 any vector whose magnitude is less than 1 the velocity of a falling object a displacement in the direction north question 2 (1 point) question 2 unsaved a worker pushes a large rock to the north while another worker by pushing it to the east. if they both exert equal force, in what direction does the rock move? question 2 options: northeast southwest north east question 3 (1 point) question 3 unsaved at take off, a plane flies 100 km north before turning to fly 200 km east. how far is its destination from where the plane took off? question 3 options: 224 km 200 km 300 km 173 km question 4 (1 point) question 4 unsaved a runner traveled 15 kilometers north then backtracked 11 kilometers south before stopping. his resultant displacement was question 4 options: 4 kilometers south 26 km south 26 km north 4 kilometers north

Phase changes are chemical changes. true or false

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?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.