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
erastova [34]
3 years ago
15

You visit the Grand Canyon on a particularly hot day, and like all good tourists, you yell "Hello!". Would you expect to hear th

e echo sooner or later than on a cooler day? Why?
Physics
1 answer:
torisob [31]3 years ago
5 0

Answer: Later

Explanation:

In cold weather the air is more dense and that is what causes the cold. It is hard for sound waves to travel through it.

You might be interested in
A particle whose speed is 50 m/s moves along the line from A(2,1) to B(9,25). Find its velocity vector in the form of ai +bj.
Kitty [74]

To write it in the form ai + bj, we need to find a and b which are:

a = x component

b = y component

 

length of x = 9 – 2 = 7

length of y = 25 – 1 = 24

 

tan θ = 24 / 7

θ = 73.74°

 

a = (50 m/s) cos 73.74

a = 14 m/s

 

b = (50 m/s) sin 73.74

b = 48 m/s

 

Hence,

14i + 48j

3 0
3 years ago
6. If you lift an object, to find the work you did on the object, you must find
OleMash [197]
I think D the weight but I’m not sure sorry if I’m wrong
3 0
3 years ago
Explain how the information from stimuli can become a memory or result in a behavior.
Natali [406]

Answer:

Potentiation, habituation, and sensitization are three ways in which stimuli in the environment produce changes in the nervous system.

5 0
3 years ago
A student exerts a force of 500 n pushing a box 10 m across the floor in 4 s. how much work does the student perform?
gregori [183]
Work = Force * distance
W = Fd

Given F = 500 N, d = 10 m
W = (500)(10)
W = 5000 J

The work done is 500 Joules. The time of 4 s is irrelevant in this case.
6 0
3 years ago
A 200g of iron at 120 degrees and a 150 g piece of copper at -50 degrees are dropped into an insulated beaker containing 300 g o
kodGreya [7K]

Answer:

T = 15.03°C

Explanation:

given data:

copper specific heat = Sc = 0.385 J/g °C

iron specific iron = Si = 0.450 J/g °C

specific heat of ethanol = Se = 2.46 J/g °C

net heat loss is equal to zero

(m*S*\Delta T)_{copper} +(m*S*\Delta T)_ {iron} +(m*S*\Delta T)_ {ethanol} = 0

150*0.385 *( T - (-50)) + 200*0.450*(T - 120) + 300*2.46 * (T -20) = 0

57.75( T - (-50)) + 0.90(T - 120) +738(T -20) = 0

57.75T + 2887.5 + 0.90T - 108 + 738T - 14760 = 0

57.75T + 0.90T+738T = - 2887.5 + 108+14760

796.65T= 11980.5

T = 15.03°C

4 0
3 years ago
Other questions:
  • Based on the diagram, which of these conclusions is correct? The frequency of Wave 1 is double the frequency of Wave 2. The freq
    11·2 answers
  • 7. Calculate the height of the center of mass above its starting height during a squat jump based on the following information:
    12·1 answer
  • Scientists who consider how their research may affect the environment show a sense of
    15·2 answers
  • As waves pass by a duck floating on a lake, the duck bobs up and down but remains in essentially one place. explain why the duck
    13·1 answer
  • The diagram shows a positive charge moving in a magnetic
    13·1 answer
  • A charge of 6.65 mC is placed at each corner of a square 0.500 m on a side.
    11·1 answer
  • Do different types of matter melt at different temperatures?
    5·1 answer
  • An atom with the expected number of neutrons, protons, and electrons is called a(n)
    5·1 answer
  • A cat becomes negatively charged when it is brushed. How does the electric charge on the brush compare to the charge on the cat?
    10·1 answer
  • Prove that you can do a one foot spin.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!