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
MariettaO [177]
4 years ago
11

Please give sure answers :) 30 pts

Physics
1 answer:
prohojiy [21]4 years ago
5 0

freq is inversely proportional to wavelength

require a medium

transfer energy

You might be interested in
Which of the following occurs when the parasympathetic nervous system PNS is activated
Sphinxa [80]

<span>When the parasympathetic nervous system is activated the primary Vessels dilate and the HR decreases, muscles will relax and also the Blood shunts to organ of digestion. The autonomic nervous system is divided into two sections, the Sympathetic and the Parasympathetic. </span>

5 0
4 years ago
A 30,000kg train moves at 45m/s How how much kinetic energy with the train have?
nordsb [41]

Answer:

30,375,000

Explanation:

1/2 x m x v^2

1/2(30000)(45)^2

6 0
4 years ago
If a force of 250N is applied to a piano being pushed up a ramp at an angle of 18degrees above the horizontal, what force is bei
klasskru [66]

answer

77.25 N

explanation

(look at picture for free body diagram)

the force on the piano has both vertical and horizontal components, and since the questions asks about the force to lift the piano, we want to find the vertical component

we can use trigonometry where sinA = opposite/hypotenuse

A = 18 degrees

hypotenuse = 250 N

sin18 = opposite (vertical component) / 250

vertical component = sin18 * 250

= 77.25 N

4 0
3 years ago
What are the Cultural impacts from vehicles?
denpristay [2]

Answer:

the use of non-renewable fuels, a dramatic increase in the rate of accidental death, the disconnection of local community, the decrease of local economy.

6 0
3 years ago
Read 2 more answers
Two people are talking at a distance of 3.0 m from where you are and you measure the sound intensity as 1.1 × 10-7 W/m2. Another
ioda

Answer:

6.1875\times 10^{-8}

Explanation:

Assuming uniform spread of sound with no significant reflections or absorption. We know that sound intensity varies I=\frac {k}{r^{2}} where r is the distance

Since intensity is given then when at 3 m

1.1\times 10^{-7}= \frac {k}{3^{2}}

k=3^{2}\times 1.1\times 10^{-7}= 9.9\times 10^{-7}

Since we have the constant then at 4m

Intensity, I= \frac {9.9\times 10^{-7}}{4^{2}}=6.1875\times 10^{-8}

8 0
3 years ago
Other questions:
  • The speed of a car during a trip is represented in the graph. Compare distance and displacement at four hours into the trip.
    9·2 answers
  • 6 use superposition to find voltage v(t) across the 100 ohm resistor
    9·1 answer
  • A shower has a power of 10kw. A family uses the shower for 1 hour per day calculate how much energy, in kilowatt hours, they wou
    14·1 answer
  • What type of matter is coleslaw?
    12·1 answer
  • An engine can exert a force of 1,000 newtons. How fast can this engine
    7·1 answer
  • 2.<br>A body, which floated in water, sank when put in kerosene. Why<br>did it happen?​
    13·1 answer
  • SCALCET8 3.9.018.MI. A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the
    14·1 answer
  • If the voltage across a 12 ohm resistor is 4.0 volts. the current through the resistor is?
    13·1 answer
  • How is one metre length define in SI system?​
    13·2 answers
  • Radiation in the ultraviolet region of the electromagnetic spectrum is quite energetic. It is this radiation that causes dyes to
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!