The first one, as the mass is higher so it accelerates more
        
             
        
        
        
Answer:
The hill is a total of 150 meters tall
Explanation:
30×5=150
 
        
             
        
        
        
Answer:
B. Solids, liquids, and gases.
Explanation:
I have no explanation.
 
        
             
        
        
        
Answer:
D. Uranium
Explanation:
I just got the answer right on my quiz.
 
        
             
        
        
        
Answer:
d. 37 °C
Explanation:
 = mass of lump of metal = 250 g
 = mass of lump of metal = 250 g
 = specific heat of lump of metal  = 0.25 cal/g°C
 = specific heat of lump of metal  = 0.25 cal/g°C
 = Initial temperature of lump of metal = 70 °C
 = Initial temperature of lump of metal = 70 °C
 = mass of water = 75 g
 = mass of water = 75 g
 = specific heat of water = 1 cal/g°C
 = specific heat of water = 1 cal/g°C
 = Initial temperature of water = 20 °C
 = Initial temperature of water = 20 °C
 = mass of calorimeter  = 500 g
 = mass of calorimeter  = 500 g
 = specific heat of calorimeter = 0.10 cal/g°C
 = specific heat of calorimeter = 0.10 cal/g°C
 = Initial temperature of calorimeter = 20 °C
 = Initial temperature of calorimeter = 20 °C
 = Final equilibrium temperature
 = Final equilibrium temperature
Using conservation of heat 
Heat lost by lump of metal = heat gained by water + heat gained by calorimeter
