67.0 km/h
68.0 km/h
69.0 km/h
The Correct Answer Is 0.33.
Answer:
B. The surface of the Earth heats the air that contacts it.
Explanation:
Conduction is a mode of heat transfer in which energy is transferred from a hot molecule to the neighboring molecules due to contact. Thus, heat energy is transferred from one molecule to another in the process.
Therefore, the air that comes in contact with the surface of the earth heats up by conduction. Since the surface of the earth is heated up due to the radiation from the Sun.
Answer: B.
Explanation: I took the test. Also, after my diagnostic I just wanted to see if my answers were correct lol.
Answer:
a= 92. 13 m/s²
Explanation:
Given that
Amplitude ,A= 0.165 m
The maximum speed ,V(max) = 3.9 m/s
We know that maximum velocity in the SHM given as
V(max) = ω A
ω=Angular speed
A=Amplitude
ω=23.63 rad/s
The maximum acceleration given as
a = ω² A
a= (23.63)² x 0.165 m/s²
a= 92. 13 m/s²
Therefore the maximum magnitude of the acceleration will be 92. 13 m/s².
The mass of the bat is approximately 1.56 kg. We can use the principle of moments to solve this problem. According to the principle of moments, the sum of the moments of all the forces acting on an object is equal to zero, assuming that the object is in equilibrium.
Let's assume that the bat has a mass of m kg and its center of mass is located at a distance of x cm from the end of the bat where the glove is attached. We can then write the following equation for the moments:
mx = (m+0.542)(x+74.8-25.9)
Here, the left-hand side represents the moment of the bat about the point where the glove is attached, and the right-hand side represents the moment of the bat and the glove about the same point. We have added the distance between the center of mass of the bat and the point where the glove is attached (74.8 cm) to the distance between the glove and the point where the glove is attached (-25.9 cm) to get the total distance between the center of mass of the combined system and the point where the glove is attached.
Simplifying the equation, we get:
m*x = (m+0.542)*48.9
Expanding the brackets, we get:
mx = 48.9m + 26.56
Rearranging and solving for m, we get:
m = 0.542*74.8/(-25.9) = 1.56 kg
Therefore, the mass of the bat is approximately 1.56 kg.
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