An observer in the earth reference frame observes cart a and cart b moving toward each other with the same speed until they collide and come to rest. consider this event as seen by observer a moving along with cart a. assume that this observer matches cart a's initial velocity but does not collide with cart b (that is, observer a continues along at the same velocity that cart a had initially). would the observer in the earth reference frame and observer a obtain the same value for the initial velocity of cart a? yes no would the observer in the earth reference frame and observer a obtain the same value for the final velocity of cart b after the collision? no yes would the observer in the earth reference frame and observer a obtain the same value for the relative velocity of the two carts after the collision?

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.

Geologists get to play with chemistry, physics, and history! and what a history you will meet as youwork your way through the course. starting at the beginning, the textbook provides the scientifically acceptedstart of the and promises that you'll get to explore some of the evidence for that scientific view, later inthe semester. meanwhile, which is more nearly correct of the scientifically accepted view? a) the earth formed when the big bang caused older materials to fall together, about 14 billion years ago.b) the earth formed from the falling together of older materials, about 4.6 billion years ago.c) the earth formed in the big bang, about 6000 years ago.d) the earth is eternal, having been here forever and promising to be here forever.e) the earth was assembled by gigantic space beavers, which gnawed down the primordial tree of life andpiled its branches together to form the planet.