Answer:
F=X.F=mxq. 3. 1 N/kg=0.5kg g=9.80
You are currently converting Distance and Length units from Centimeters to Feet 321 Centimeters (cm) = 10.5315 Feet (ft) This is a hard one but see if this helps if not let me now and i can try again..
To solve this exercise we will use the concept related to heat loss which is mathematically given as

Where,
m = mass
= Specific Heat
Change in temperature
Replacing with our values we have that

Specific heat of mercury

Replacing

Therefore the heat lost by mercury is 0.09J
The answer would be C. It will decrease with descent. Hope this helps!
Answer:
a) 
b) 
c) 
d) 
e) Since Dave starts from house and finally returns to the house so displacement is zero.
Explanation:
Given:
- distance between the house and the store,

- speed of driving from house to store,

- speed of driving back from store to house,

Since the store is located towards east from his house and the velocity in this direction is taken negative and contrary to this the velocity in the west direction is taken positive.
a)
time taken in reaching the store:



b)
Now the time taken in returning form the store:



therefore total time taken by the trip:



c)
the time taken by the trip in minutes:


d)
distance travelled in the whole trip:



e)
Since Dave starts from house and finally returns to the house so displacement is zero.