A car is moving at a speed of 50km/hour. The driver takes her foot off the accelerator in the car coasts to a stop. why? A) no acceleration means no movement
B) Energy is no longer being transformed
C) without an external energy source friction stops the car
D) all the kinetic energy is converted to potential energy or energy of position

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet

An unknown substance is a white solid at room temperature and has a melting point of 78 °c. which of the following substances is most likely to be the identity of the unknown sample?