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
My name is Ann [436]
3 years ago
5

Think of 3 ways that an environment might change. Be specific and explain how

Physics
1 answer:
Yuki888 [10]3 years ago
5 0

Answer:

don't know

Explanation:

You might be interested in
A 15 m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes a 60° angle with horizontal. (a) Find t
scoray [572]

Answer:

a)    F₁ = 267.3 N,   N₁ = 1300 N,  b)    μ = 0.324

Explanation:

For this exercise we use the rotational equilibrium condition, we have a reference system is the floor and the anticlockwise rotations as positive, in the adjoint we can see a diagram of the forces

           

let's use subscript 1 for the ladder and 2 for the firefighter

            ∑ τ = 0

          -W₁ x₁ - W₂ x₂ + N₁ y = 0

           N₁ = \frac{W_1 x_1 + W_2 x_2}{y}          (1)

the center of mass of the ladder is at its geometric center,

d = L / 2 = 15/2 = 7.5 m

         cos 60 = x₁ / d₁

         x₁ = d₁ cos 60

         x₁ = 7.5 cos 60

         x₁ = 3.75 m

for the firefighter d₂ = 4 m

         cos 60 = x₂ / d₂

         x₂ = d₂ cos 60

          x₂ = 4 cos 60 = 2 m

for the fulcrum d₃ = 15 m

         sin 60 = y / d₃

         y = d₃ sin 60

         y = 15 sin 60

         y = 13 m

we look for the Normal by substituting in equation 1

         N₂ = \frac{500 \ 3.75 \ + 800 \ 2}{13}

         N₂ = 267.3 N

now let's use the translational equilibrium relations

 X axis

           F₁ - N₂ = 0

           F₁ = N₂

           F₁ = 267.3 N

Axis y

          N₁ - W₁ -W₂ = 0

          N₁ = W₁ + W₂

          N₁ = 500 + 800

          N₁ = 1300 N

b) for this case change the firefighter's distance d₂ = 9 m

          x₂ = 9 cos 60

          x₂ = 4.5 m

we substitute in 1

          N₂ = \frac{500 \ 3.75 \ + 800 \ 4.5}{13}  

          N₂ = 421.15 N

of the translational equilibrium equation on the x-axis

          fr = F₁ = N₂

          fr = 421.15 N

friction force has the expression

          fr = μ N

in this case the reaction of the Earth to the support of the ladder is N1 = 1300N

          μ = fr / N₁

          μ = 421.15 / 1300

          μ = 0.324

8 0
2 years ago
Work is the transfer of _______ that occurs when a force makes an object move.
Vlad1618 [11]
I think it is energy
4 0
3 years ago
If light moves at a speed of 299,792,458 m/s, how long will it take light to move a distance of 1,000 km
astra-53 [7]

Answer:

change 1000km into Metre

1000km=1000000 M

speed= distance/time

time=distance/speed

time=1000000/299792458

time= 0.0033second

6 0
2 years ago
Which of the following is an example of kinetic energy being converted to potential energy?
horsena [70]
Of the following...?? Is there more to this question? :)
4 0
2 years ago
Read 2 more answers
In a car, 75 percent of the chemical energy of gasoline is lost as thermal
LenaWriter [7]
821
s
s
s
s
s
s
s
s
s
s
s
s
ws
asd
asd
asd
asd
ad
a
sda
d
≥≡³

3 0
3 years ago
Other questions:
  • Match the following vocabulary terms to their definitions. 1. density a proposed explanation for a scientific problem 2. matter
    13·2 answers
  • Stacy travels 5 times as fast as Eric. Traveling in opposite directions, they are 336 miles apart after 4 hours. Find their rate
    6·1 answer
  • Which of the following objects will exert the greatest gravitational force on a box, if the distance between them remains the sa
    14·1 answer
  • Assume everyone in the United States consumes one soft drink in an aluminum can every two days. if there are 280 million america
    6·1 answer
  • If a proton and an electron are released when they are 4.00 x 10^-10 m apart, find the initial acceleration of each of them.
    6·2 answers
  • B) A non-inductive load takes a current of 15 A at 125 V. An inductor is then connected
    12·1 answer
  • What would happen if you didn't have chemical energy in your body? Choose the best answer.
    6·1 answer
  • Please show work with the answer and thank you
    14·1 answer
  • According to the universal law of gravitation, the force due to gravity is b. directly proportional to the square of the distanc
    14·1 answer
  • An ambulance traveled on roads from the hospital 14 kilometers east, then 16 kilometers north to reach an accident. If the ambul
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!