(20 sec)/(40 swings) = 0.5 sec/swing
Answer:
The velocity of the rock when it reaches the ground is
7
m
s
.
Explanation:
The formula we are using is
V
2
2
=
V
2
1
+
2
a
Δ
d
=> Where
V
is the velocity in
m
s
.
=> Where
a
is acceleration in
m
s
2
.
=> Where
Δ
d
is the change in displacement in
m
.
So now we just plug in the numbers.
V
2
2
=
V
2
1
+
2
a
Δ
d
=
0
+
2
(
9.8
)
(
2.5
)
=
√
49
=
7
The velocity of the rock when it reaches the ground is
7
m
s
.
Thermal energy is transferred between particles that are not touching each other
Thermal energy is transferred between particles that are in direct contact with each other.
Thermal energy is transferred between objects of different temperatures.
Thermal energy is transferred between objects of the same temperature
Thermal energy is transferred from slow-moving particles to fast-moving particles
Thermal energy is transferred from fast-moving particles to slow-moving particles
Answer:
2, 3, and 6
Explanation:
got it right
The image is virtual and larger than the object.
The image is virtual and smaller than the object.
The image is real and larger than the object.
Answer:
The image is virtual and smaller than the object.
Explanation:
A concave lens is a diverging lens, meaning that it spreads out light rays that have been refracted through it. A concave lens is thinner at its center than at its edges.
It always produces virtual images because the image appears to form on the same side of the lens where the object is placed.
The image is always smaller than the object. Far the object, smaller will be its image.
A light ray diagram of a concave lens is attached for a better understanding.
Answer: The image is virtual and smaller than the object.
Explanation: