answer.
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
Shtirlitz [24]
2 years ago
10

Four identical pallets of bricks, each with a mass of 40 kg with a square cross-sectional area of 0.50 m2, are stacked on the fl

oor. What is the change in height of the pallet at the bottom of the stack if the pallets are 5.0 m tall when not stacked
Physics
1 answer:
STatiana [176]2 years ago
4 0

Answer:

Explanation:

Modulus of elasticity of brick, Y = 28 x 10^9 Pa

mass of each, m = 40 kg

Area of each, A = 0.5 m²

number of bricks, n = 4

height, h = 5 m

Let the change in height is Δh.

Use the formula of Modulus of elasticity

E = stress/ strain

stress = n x m x g/A = 4 x 40 x 9.8 / 0.5 = 3136 Pa

So,

3136 = 28 \times  10^{9}\times \frac{\Delta h}{5}

Δh = 5.6 x 10^-7 m

You might be interested in
When a pendulum is pulled back from its equilibrium position by 10∘, the restoring force is 1.0 N. When it is pulled back to 30∘
jarptica [38.1K]

Answer: B

Explanation: I said B because if you pull something back what is going to be more of a force pulling back or letting it go for a rubier band yes it will have more force if you let it go

5 0
2 years ago
Read 2 more answers
The two major problems with most motor vehicles are that they burn fossil fuels and _____________.
Citrus2011 [14]

Answer:

A. Create radioactive waste i believe

Explanation:

8 0
2 years ago
Read 2 more answers
You slip a wrench over a bolt. Taking the origin at the bolt, the other end of the wrench is at x=18cm, y=5.5cm. You apply a for
mart [117]

Answer:

The torque on the wrench is 4.188 Nm

Explanation:

Let r = xi + yj where is the distance of the applied force to the origin.

Since x = 18 cm = 0.18 cm and y = 5.5 cm = 0.055 cm,

r = 0.18i + 0.055j

The applied force f = 88i - 23j

The torque τ = r × F

So, τ = r × F = (0.18i + 0.055j) × (88i - 23j) = 0.18i × 88i + 0.18i × -23j + 0.055j × 88i + 0.055j × -23j

= (0.18 × 88)i × i + (0.18 × -23)i × j + (0.055 × 88)j × i + (0.055 × -22)j × j  

= (0.18 × 88) × 0 + (0.18 × -23) × k + (0.055 × 88) × (-k) + (0.055 × -22) × 0   since i × i = 0, j × j = 0, i × j = k and j × i = -k

= 0 - 4.14k + 0.0484(-k) + 0

= -4.14k - 0.0484k

= -4.1884k Nm

≅ -4.188k Nm

So, the torque on the wrench is 4.188 Nm

8 0
2 years ago
Which method should be used to determine which type of natural event produces the greatest number of sand dunes?
jeka94

Answer:

Stabilizing dunes involves multiple actions. Planting vegetation reduces the impact of wind and water. Wooden sand fences can help retain sand and other material needed for a healthy sand dune ecosystem. Footpaths protect dunes from damage from foot traffic.

Explanation:

5 0
2 years ago
The magnetic field around the head has been measured to be approximately 3.00×10−8 gauss . Although the currents that cause this
konstantin123 [22]

Answer:

3.81972\times 10^{-7}\ A

Explanation:

B = Magnetic field = 3\times 10^{-8}\ G

d = Diameter of loop = 16 cm

r = Radius = \frac{d}{2}=\frac{16}{2}=8\ cm

i = Current

\mu_0 = Vacuum permeability = 4\pi \times 10^{-7}\ H/m

The magnetic field of a loop is given by

B=\frac{\mu_0i}{2r}\\\Rightarrow i=\frac{B2r}{\mu_0}\\\Rightarrow i=\frac{3\times 10^{-8}\times 10^{-4}\times 2\times 0.08}{4\pi\times 10^{-7}}\\\Rightarrow i=3.81972\times 10^{-7}\ A

The current needed to produce such a field at the center of the loop is 3.81972\times 10^{-7}\ A

5 0
2 years ago
Other questions:
  • A pulley system used to lift car tires has a mechanical advantage of 11.2. If you pull on the pulley with a force of 150 N, how
    12·2 answers
  • An object having a mass of 2.0 kilograms falls from a height of 15 meters. What is its kinetic energy when it hits the ground?
    13·1 answer
  • A stationary 1.67-kg object is struck by a stick. The object experiences a horizontal force given by F = at - bt2, where t is th
    13·1 answer
  • "The drawing shows three layers of different materials, with air above and below the layers. The interfaces between the layers a
    7·1 answer
  • answers Collision derivation problem. If the car has a mass of 0.2 kg, the ratio of height to width of the ramp is 12/75, the in
    11·1 answer
  • A hot air balloon must be designed to support a basket, cords, and one person for a total payload weight of 1300 N plus the addi
    9·1 answer
  • Using all three of Newton's laws of motion, carefully describe the motion of a baseball beginning when the ball is resting in th
    14·1 answer
  • Rod A has twice the diameter of rod B, but both are made of iron and have the same initial length. Both rods are now subjected t
    11·1 answer
  • An object begins at position x = 0 and moves one-dimensionally along the x-axis witļi a velocity v
    5·1 answer
  • What is the magnitude of the force between a 25μC charge exerts on a -10μC charge 8.5cm away?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!