1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Dafna11 [192]
3 years ago
15

What is the best description of the acceleration of an object?

Physics
1 answer:
marin [14]3 years ago
8 0
The rate of change of velocity
You might be interested in
Sound Waves can be used to measure ocean depth. This done by sending a sound wave to the floor of the ocean and recording the ti
vazorg [7]
When the sound wave returns to the machine, you can measure
how long it took to return. 

(You may notice that it's working just like RADAR, which does the
same thing with radio waves instead of sound waves.)

Even if you know how long the sound took to get to the bottom and
return to the top, you can't DO anything with this information if you
don't know the SPEED of the sound through the water.  Not only
the inventory of this machine, but anyone who uses it, has to know
the speed of the sound through water in order to use the round-trip
time to calculate the depth.
3 0
3 years ago
Why are earbud wires for an mp3 player coated with plastic
saw5 [17]

2) they add the insulation to better the durability or the earbuds

6 0
3 years ago
Read 2 more answers
As you may well know, placing metal objects inside a microwave oven can generate sparks. Two of your friends are arguing over th
Fofino [41]

Answer:

5.04\cdot 10^8 A

Explanation:

The work function of the metal corresponds to the minimum energy needed to extract a photoelectron from the metal. In this case, it is:

\phi = 3.950\cdot 10^{-19}J

So, the energy of the incoming photon hitting on the metal must be at least equal to this value.

The energy of a photon is given by

E=\frac{hc}{\lambda}

where

h is the Planck's constant

c is the speed of light

\lambda is the wavelength of the photon

Using E=\phi and solving for \lambda, we find the maximum wavelength of the radiation that will eject electrons from the metal:

\lambda=\frac{hc}{E}=\frac{(6.63\cdot 10^{-34} Js)(3\cdot 10^8 m/s)}{3.950\cdot 10^{-19} J}=5.04\cdot 10^{-7}m

And since

1 angstrom = 10^{-15}m

The wavelength in angstroms is

\lambda=\frac{5.04\cdot 10^{-7} m}{10^{-15} m/A}=5.04\cdot 10^8 A

3 0
3 years ago
Waves move fastest in
JulijaS [17]
Liquids<span> are not </span>packed<span> as tightly as </span>solids<span>. And gases are very loosely </span>packed<span>. The spacing of the molecules enables </span>sound<span> to travel much faster through a </span>solid<span> than a gas. </span>Sound<span> travels about four times faster and farther in water than it does in air.</span>
4 0
3 years ago
Read 2 more answers
Whose contributions to astronomy explained how planets were held in their orbits?
ankoles [38]

Answer:

D newton

Explanation:

he did extensive research on gravity, and gravity is what holds planets in orbits.

3 0
3 years ago
Other questions:
  • Listed following are three possible models for the long-term expansion (and possible contraction) of the universe in the absence
    13·1 answer
  • Why have fossil fuels become our primary energy resource
    12·2 answers
  • How to solve 5,897,159 milligrams into kilograms?
    7·2 answers
  • ) A convex-concave thin lens is made with the radius of curvature of the convex surface being 25.0 cm and the concave surface 45
    7·1 answer
  • Why are atoms electrically neutral?
    8·1 answer
  • The battery has a voltage of 12V. R1 = R2 = 100Ω.
    10·1 answer
  • Which methods of conservation are considered controversial in Virginia? Check all that apply.
    13·1 answer
  • 7
    14·1 answer
  • Liquid pools of methane are found on the surface of Titan, one of Saturn's moons. The temperature on the surface of Titan is -18
    6·1 answer
  • Which would most likely cause a decrease in the rate of energy production in a fusion nuclear reactor?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!