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Suppose you want to move a big rock in your yard. It is about waist high and 4 feet long, has a volume of 1.2 m3 and a density o

beks73 [17]

Answer:

6613.87 lbs

Explanation:

1.2 m³ = 1200000 cm³

Mass = Density * Volume

M = (2.5 g/cm³) * 1200000 cm³ = 3000000 g

1 lb = 453.592 g

3000000 g * (1 lbs / 453.592 g) = 6613.87 lbs

3 0

2 years ago

A wave on a string is described by D(x,t)= (2.00cm)sin[(12.57rad/m)x−(638rad/s)t], where x is in m and t is in s. The linear den

mamaluj [8]

Answer : The string tension is $T = 12.882 N$

The maximum displacement is 0.02 m

The maximum speed is $v = 12.76\ m/s$

Explanation :

Given that,

D(x,t) = (2.00 cm) sin [(12.57rad/m)x - (638rad/s)t]

Where, x is in m and t is in sec.

Linear density of the string = 5.00 g/m

We know that,

Velocity of the wave

$v = \dfrac{\omega}{k}$

$v = \dfrac{638}{12.57}\ m/s$

$v = 50.76\ m/s$

Now, the string tension

$v = \sqrt\dfrac{T}{m}$

$T = 0.005\times (50.76)^{2}\ N$

$T = 12.882 N$

The maximum displacement is 0.02 m

The maximum speed

$v = a \omega$

$v = 0.02\times638\ m/s$

$v = 12.76\ m/s$

Hence, this is the required solution.

5 0

3 years ago

Which disease or disorder affects the lower respiratory system? Tuberculosis, laryngitis, sinus-itis, the common cold.

Wewaii [24]

Answer:

Tuberculosis

Explanation:

Tuberculosis is a disease of lower respiratory system because it's affect the lungs and the voice box . It is a bacteria disease that affect the lungs and it is very contagious. It can spread rapidly to the brain and spine. Most times people with tuberculosis did not show symptoms but when there is symptoms,the symptoms include cough with blood, night sweats, fever e t.c.

8 0

3 years ago

Read 2 more answers

Under what condition will kinetic friction slow a sliding object?

matrenka [14]

Explanation: Slowing Down (or Stopping) occurs when the force of kinetic friction is greater than that of the external force. This also follows Newton's first law of motion as there exists a net force on the object.

6 0

2 years ago

A pendulum is set in motion and time. The time measured for 20 complete swings is 308.

laiz [17]

Answer:

solution

308=20 swings

?::: =1

( 308×1)÷20

308÷20

154÷10

=15.4

=15.4

6 0

3 years ago