This document contains a practice worksheet with multiple choice and short answer questions about motion graphs. The questions ask students to identify terms like motion, reference point, velocity and speed from definitions. They are also asked to analyze motion graphs to determine if objects are moving at constant speed, accelerating, decelerating or stopped based on the shape of the graph. They must also calculate values like speed, average speed and velocity from the graphs.
Astrobiology Comic (Issue 1)για παιδιά Γυμνασίου.pdfΜαυρουδης Μακης
This document provides a summary of the history of exobiology and astrobiology at NASA. It discusses how the fields have evolved over the past 50 years from early speculation about life on other planets to the establishment of NASA's Exobiology program in 1960 and the expanded Astrobiology Program in the 1990s. The summary also highlights some of the key figures and experiments that helped shape our understanding of the potential for life elsewhere, such as the Miller-Urey experiment which demonstrated how organic molecules could form in conditions similar to the early Earth.
1. Temperature Change and Heat Capacity
Μεταβολή θεπμοκπασίαρ και θεπμοχωπητικότητα
Exercise 1. Άσκηση 1
On a hot day, the temperature of an 80,000-L swimming pool increases by 1.50°C.
What is the net heat transfer during this heating? Ignore any complications, such as
loss of water by evaporation.
Μηα δεζηή εκέξα, ε ζεξκνθξαζία 80.000-L λεξνύ ζε κηα πηζίλα
απμάλεη θαηά 1,50 ° C. Πνηα είλαη ε κεηαθνξά ζεξκόηεηαο από ην
πεξηβάιινλ πξνο ην λεξό θαηά ηε δηάξθεηα απηήο ηεο ζέξκαλζεο;
Αγλνήζηε ηελ απώιεηα ηνπ λεξνύ από ηελ εμάηκηζε
5.04 × 108
J
Exercise 2. Άσκηση 2
Show that 1 cal/g · °C = 1 kcal/kg · °C.
Δείξτε ότι : 1 cal/g · °C = 1 kcal/kg · °C.
2. Exercise 3. Άσκηση 3
To sterilize a 50.0-g glass baby bottle, we must raise its temperature from 22.0°C to
95.0°C. How much heat transfer is required?
Γηα ηελ απνζηείξωζε 50.0-g γπάιηλεο θηάιεο κωξνύ, ζα πξέπεη
λα απμεζεί ε ζεξκνθξαζία ηεο από 22,0 ° C έωο 95,0 ° C. Πόζε
ζεξκόηεηα απαηηείηαη λα κεηαθεξζεί ζηε θηάιε ;
3.06 × 103
J
