All categories

3 years ago

Why steel is more elastic than rubble

1 answer:

3 0

Steel is more elastic than rubber because steel comes back to its original shape faster than rubber when the deforming forces are removed, hope it helps :)

You might be interested in

How do I find the tension? its supposed to be in the mid 40s

babunello [35]

Answer:

a = 2.3 m/s²

T = 45 N

Explanation:

Draw a free body diagram for each mass.

For the mass on the incline, there are four forces:

Weight force mg pulling down.

Normal force N perpendicular to the incline.

Friction force Nμ pushing down the incline.

Tension force T pulling up the incline.

For the hanging mass, there are two forces:

Weight force Mg pulling down.

Tension force T pulling up.

Sum of the forces on the hanging mass in the -y direction:

∑F = ma

Mg − T = Ma

T = Mg − Ma

Sum of the forces on the sliding mass in the perpendicular direction:

∑F = ma

N − mg cos θ = 0

N = mg cos θ

Sum of the forces on the sliding mass in the parallel direction:

∑F = ma

T − mg sin θ − Nμ = ma

Substitute:

Mg − Ma − mg sin θ − mgμ cos θ = ma

Mg − mg (sin θ + μ cos θ) = ma + Ma

Mg − mg (sin θ + μ cos θ) = (m + M) a

a = [ Mg − mg (sin θ + μ cos θ) ] / (m + M)

Plug in values:

a = [ 6.0×9.8 − 5.0×9.8 (sin 30° + 0.20 cos 30°) ] / (5.0 + 6.0)

a = 2.3 m/s²

Now find tension:

T = Mg − Ma

T = 6.0×9.8 − 6.0×2.3

T = 45 N

3 0

4 years ago

Which statement accurately describes the big bang theory? The universe began at an outer boundary and has been collapsing since

iren [92.7K]

Answer: The statements are missing hence I will give you a summary of what the big bang theory .

answer : The big bang theory explains how the energies of every speck of the universe came together at a point ( very dense point ) and eventually exploded creating the various galaxies we have today

Explanation:

The Big bang theory describes how the Universe and the various galaxies that exist began some billion of years ago, It describes how the energies of every speck of the universe came together at a point ( very dense point ) and eventually exploded creating the various galaxies we have today

5 0

3 years ago

A motor raises the car up the tower from point C to point A with a constant velocity. State Newton’s First Law of Motion and exp

GarryVolchara [31]

newton 1st law: w no external force, a body will stay at rest or in constant uniform motion.

a motor raises the car up the tower. cuz it moves w/ constant vel, there is no external force: the motor force is the same n in opposity direction as the gravity force on car.

8 0

3 years ago

Read 2 more answers

A 0.03 in.diameter glass tube is inserted into SAE 30 oilat 60°F. The contact angle (i.e., the angle a liquid forms in contact w

Snowcat [4.5K]

Answer:

The value of capillary rise in the tube = 0.0363 cm

Explanation:

Diameter of the glass tube = 0.03 meter

Contact angle = 22 degree

We know that the capillary rise (h) in the tube is given by the formula =

h = (2 α cos β) / (d g R )

⇒ d = density of gasoline = 749 kg / $m^{3}$

β = 22 degree

R = radius of the tube = 0.015 m

α = surface tension of gasoline = 0.0216 N / m

cos 22 = 0.927

Put all the values in the above formula we get

⇒ h = (2 × 0.0216 × 0.927) / (749 × 9.81 × 0.015)

⇒ h = 0.0363 cm

This is the value of capillary rise in the tube.

7 0

3 years ago

The compressor in a certain carnot refrigerator performs 480 j of work to remove 150 j of heat from the interior of the refriger

Liono4ka [1.6K]

630 J is the answer :)

3 0

4 years ago