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
Fittoniya [83]
3 years ago
11

1.- La gráfica muestra la variación de la aceleración a de un objeto con el tiempo t.

Physics
1 answer:
STatiana [176]3 years ago
5 0

Answer:

Te ayudo con una de prueba $

Explanation:

You might be interested in
What provides the force necessary to start a building or bridge oscillating?
Andrew [12]
Usually, the forces that start the oscillation of buildings are the wind and microearthquakes.
4 0
3 years ago
Microwave ovens use microwave radiation to heat food. the microwaves are absorbed by the water molecules in the food, which is t
PIT_PIT [208]
<span>step 1: energy required to heat coffee E = m Cp dT E = energy to heat coffee m = mass coffee = 225 mL x (0.997 g / mL) = 224g Cp = heat capacity of coffee = 4.184 J / gK dT = change in temp of coffee = 62.0 - 25.0 C = 37.0 C E = (224 g) x (4.184 J / gK) x (37.0 C) = 3.46x10^4 J step2: find energy of a single photon of the radiation E = hc / λ E = energy of the photon h = planck's constant = 6.626x10^-34 J s c = speed of light = 3.00x10^8 m/s λ = wavelength = 11.2 cm = 11.2 cm x (1m / 100 cm) = 0.112 m E = (6.626x10^-34 J s) x (3.00x10^8 m/s) / (0.112 m) = 1.77x10^-16 J step3: Number of photons 3.46x10^4 J x ( 1 photon / 1.77x10^-16 J) = 1.95x10^20 photons</span>
7 0
3 years ago
Read 2 more answers
One speaker generates sound waves with amplitude A.
raketka [301]

Answer:

iv) It is 9x bigger than before

Explanation:

As the amplitudes of the new speakers add directly with the original one, taking into account the phase that they have, the composed amplitude of the sound wave is as follows:

At = A + 4A -2A = 3 A

The intensity of the wave, assuming it propagates evenly in all directions, is constant at a given distance from the source, and can be expressed as follows:

I = P/A

where P= Power of the wave source, A= Area (for a point source, is equal to the surface area of a sphere of radius r, where is r is the distance to the source along a straight line)

For a sinusoidal wave, the power is proportional to the square of the amplitude, so the intensity is proportional to the square of the amplitude also.

If the amplitude changes increasing three times, the change in intensity will be proportional to the square of the change in amplitude, i.e., it will be 9 times bigger.

So, the statement iv) is the right one.

7 0
3 years ago
Why are scientific theories modified, but seldom discarded?
scoundrel [369]
Because some scientific theories are true and some are false
5 0
3 years ago
Read 2 more answers
Help me please I will give you a crown!!!!
grigory [225]

Answer:

ID:6207328365

p.a.s.s:qwerty

o.n.l.y f.o.r g.i.r.l.s.

8 0
2 years ago
Read 2 more answers
Other questions:
  • A ball has mass of 140g. what is the force to accelerate the ball at 25m/s
    9·2 answers
  • A family pool holds 10,000 gallons of water how many cubic meters is this
    13·2 answers
  • In which place moutain or terai,the value of g is more and why?​
    10·1 answer
  • Which theory was first proposed by Albert Einstein
    14·2 answers
  • Suppose you wanted to hold up an electron against the force of gravity by the attraction of a fixed proton some distance above i
    6·1 answer
  • Mechanical Energy is _______ when the amount of kinetic and potential energies added together remains the same.
    9·1 answer
  • Please help<br>Will give the brainliest!​
    9·1 answer
  • A transverse wave causes its medium to move in what direction?
    8·2 answers
  • Calculate the frequency of a sound wave produced when a tennis racquet string is plucked. The tension of the string is 274 N, th
    12·1 answer
  • PLease help with this this is pretty hard for me i kinda get it but not fully
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!