The inward movement of air in a surface low pressure system that cause the air mass to shrink is called : c. horizontal convergence.
horizontal convergence refer to inflow (convergence) or outflow (divergence).
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Sawing the piece of wood in half is a physical change,
because no new substances are formed that weren't there
before the sawing.
Burning wood produces carbon monoxide and carbon dioxide
that weren't there before the burning. That's a chemical change.
Rust forming on iron is iron oxide that wasn't there before the
rusting. That's a chemical change.
The green that appears on copper is copper oxide that wasn't
there before the green appeared. That's a chemical change.
Answer:
20g
Explanation:
Given parameters:
Quantity of heat = 240calories
Initial temperature = 80°C
Final temperature = 68°C
Unknown:
Mass of water = ?
Solution;
To solve this problem, we use the expression:
Q = m c (t₂ - t₁)
Q is the quantity of heat
m is the mass
c is the specific heat = 1 cal/g°C
t₂ is the final temperature
t₁ is the initial temperature
Insert the parameters and solve;
Change in temperature is an absolute value
240 = m x 1 x (68 - 80)
m = 20g
Answer:
a) v=1.36f
b)m=.36
c) real
d) Inverted
Explanation:
a)
In this question we have given,
object distance from converging lens,u=-3.78f
focal length of converging lens,=f
we have to find location of image,v=?
and magnification,m=?
we know that u, v and f are related by following formula
.............(1)
put values of f u in equation (1)
we got,
or
v=1.36f
b) Magnification, 
c)
Here the object is located further away from the lens than the focal point therefore image is real image and inverted.
d) image is inverted
