Asmall charged sphere is attached to a thread and placed in an electric field. the other end of the thread is anchored so that when placed in the field the sphere is in a static situation (all the forces on the sphere cancel). the sphere has a mass of 0.018 kg and contains a charge of – 64.30 x 10^3 c. the tension in the thread is 6.57 x 10^-2 n. show your work and/or explain your reasoning. if the thread is horizontal, find the magnitude and direction of the electric field. 2. now the same particle is removed from the thread and placed below the center of a charged plate and released. are there any conditions under which it is possible for the particle to be suspended in the air below the plate? show any relevant calculations and explain your reasoning

1. when conducting a test on what kind of music increases the growth of plants, all of the following would fail to meet to fair test standard except (1 point) using different kinds of plants. giving some plants more water than others. exposing the plants to different types of music. using nutrient-rich soil for one and lesser soil for others. 2. engineering uses scientific thinking to solve real-world problems. (1 point) true false 3. what does it mean to test a hypothesis? (1 point) pass a quiz on other scientists’ results analyze only the results from scientific sources not make assumptions about how an experiment will turn out see if the results of an experiment are what the scientist predicted

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8

Use the library or internet to research each planet. make a chart comparing the following: approximate surface temperature relative surface gravity compared to earth atmospheric gases water in any form: solid, gas, or liquid when you have completed your chart, use the information you have collected to answer the following questions: which is the hottest planet? which is the coldest planet? which planet's temperature is closest to that of earth? (note: water boils at 100°c/212°f. water freezes at 0°c/32°f) which planet has the greatest gravitational attraction? which planet has the least gravitational attraction? which planet's gravitational pull is closest to that of earth? do any of the planets have oxygen in their atmosphere? which planet's atmosphere most resembles that of earth? do any of the planets have flowing water? which planet's water resources (solid, gas, or liquid) might be close to the amount on earth? which planet most resembles earth in terms of all of the factors: temperature, gravity, atmosphere, and water? if earth became an uninhabitable planet, which planet do you think would be the next best to live on? explain your answer.