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dem82 [27]
3 years ago
7

If an object falls from rest and lands 3.2 seconds later, how many meters did it fall

Physics
1 answer:
DIA [1.3K]3 years ago
6 0

Answer:

50.2 meters

Explanation:

When an object falls, it goes a distance d in time t according to the formula:

d=\frac{1}{2}*g*t^{2}

d is the distance in meter, g is the acceleration due to gravity with the value of 9.8m/s^{2} , t is the time in seconds

Therefore, d = \frac{1}{2}*9.8*(3.2)^{2}

d= 50.176 ≈ 50.2m

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Match the following words with their definitions.
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Answer:

1. Doppler Effect = The apparent change in frequency perceived when the source of sound is approaching or moving away from an observer

2. Beats = The vibration of an object at its natural frequency, caused by a force or wave of the same frequency

3. Resonance = a series of alternating reinforcements and cancellations produced by the interference of waves

4. Shockwave = The cone-shaped wave made by a particle moving faster than the speed of a wave in that medium

Explanation:

I hope this helps. :)

7 0
4 years ago
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If an object falls far enough, it will reach terminal velocity. At this velocity, the force of air
love history [14]

Answer:

The object will contine to fall, but at a constant velocity.  There will be no more acceleration.

Explanation:  When the force of gravity is equal to the reverse force of air resistance, there will will be no net force on the falling obect.  F = ma, and F (net) = 0.  It will continue at the same speed until those forces become imbalanced again (such as when the force pushing up from the ground is greater than the force of gravity pulling it down).  The metric term for this sudden resistance is "crash/bang/clunk/yieouch."

3 0
3 years ago
In order of fastest to slowest, how do sound waves travel through different mediums?
Nikitich [7]
Gases, liquids, solids
7 0
3 years ago
When you burn natural gas in the laboratory, methane burns. What numbers fill in the blanks to balance this equation? ___CH4 + _
Luda [366]
The answer is CH4, 2O2, ? CO2 H20.
In the reaction, the the bonds in the methane and oxygen come apart, the atoms rearrange and then re-bond to form water and carbon dioxide. The little number written at the lower right after an atom (subscript) tells how many of that atom are in the molecule. The big number written in front of a molecule (coefficient) shows how many of that molecule there are. All the atoms in the products come from the atoms in the reactants.

The reactants are on the left side of the equation and the products are on the right. In the reaction, the bonds in the methane and oxygen come apart, the atoms rearrange and then re-bond to form water and carbon dioxide

All the atoms in the reactants form the products so the mass of the reactants and the products is the same. No new atoms are created and no atoms are destroyed.
7 0
4 years ago
Read 2 more answers
The threshold wavelength for the photoelectric effect for silver is 262 nm. (a) Determine the work function for silver. (b) What
IrinaVladis [17]

Answer with Explanation:

We are given that

Threshold wavelength,\lambda_0=262 nm=262\times 10^{-9} m

1 nm=10^{-9} m

a.Work function,w_0=\frac{hc}{\lambda_0}

Where h=6.626\times 10^{-34}

c=3\times 10^8 m/s

Using the formula

w_0=\frac{6.626\times 10^{-34}\times 3\times 10^8}{262\times 10^{-9}}

w_0=7.59\times 10^{-19} J

b.Wavelength,\lambda=222nm=222\times 10^{-9} m

K.E=\frac{hc}{\lambda}-7.59\times 10^{-19}

K.E=\frac{6.626\times 10^{-34}\times 3\times 10^8}{222\times 10^{-9}}-7.59\times 10^{-19}

K.E=8.95\times 10^{-19}-7.59\times 10^{-19}=1.36\times 10^{-19} J

Hence, the maximum kinetic energy of an electron emitted=1.36\times 10^{-19} J

3 0
4 years ago
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