1. why do you think uncertainty in measurement occurs? give at least two reasons [2 points] if x = 2.5 ± 0.1 cm and y = 3.1 ± 0.1 cm, and z = x + y, determine zo and the upper bound of δ 2. 1+1-2 points]. the volume of a cylinder is given by v = πγ21/4, where r is the radius and l is the length of the cylinder. if we measured r 2.10 ± 0.05 cm, and 1 = 3.40 ± 0.05 cm, determine the uncertainty in volume. show your calculation (hint: use equation 4] [2 points]. 3. 4. find the average and standard deviation of the following measurements: 12.3 cm, 13.1 cm, 12.6 cm, 13.0 cm, 12.5 cm, 12.9 cm.(1+1 2 points

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d

Pl asaaap ! match the term to the correct description. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. movement that is like a t transfers energy from one location to another 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up