Answer:
try this
Explanation:
The energy of a falling object when it hits the ground is equaled to the energy it starts with because the potential energy is converted into kinetic energy entirely with the height at 0. This means the energy would be 200 J.
RESULT
Hi is together and immediately after the collision are
The approximate speed of sound is about 761 mph or 335.28 meters/second.
<h3>What's the approximate speed of sound?</h3>
If we consider the normal atmosphere at sea level, the speed of sound is about 761 mph or 335.28 meters/second. The speed of sound is different in different mediums such as solid and liquid.
So we can conclude that the approximate speed of sound is about 761 mph or 335.28 meters/second.
Learn more about speed here: brainly.com/question/4931057
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Heat required = mass (g)*specific heat (c)* Temperature change (ΔT)
Given,
mass = 150 g, specific heat = 4.187 J/g.K, ΔT = -15 -(-30 = -15+30 = 15 K
Therefore,
Heat, H = 150*4.187*15 = 9420.75 J
Answer:
d) a = 4.1 m/s²
Explanation:
m = 92 Kg
∅ = 40º
μ = 0.293
a = ?
We can obtain the forces in the direction x' (of motion)
Wx' = W*Sin ∅ = m*g*Sin ∅
Ffriction = μ*N = μ*m*g*Cos ∅
then we use Newton's 2nd Law as follows:
Wx' - Ffriction = m*a
m*g*Sin ∅ - μ*m*g*Cos ∅ = m*a
⇒ a = g*(Sin ∅ - μ*Cos ∅)
⇒ a = (9.81 m/s²)*(Sin 40º - 0.293*Cos 40º)
⇒ a = 4.1038 m/s²