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2 years ago

The Pacific Ocean has a surface area of about 166 241 700 km2 and an average depth of 3940 m. Estimate the

Physics

1 answer:

Tatiana [17]2 years ago

4 0

Answer:

Volume = 6.5 x 10¹⁸ cm³

Explanation:

The volume of an object is the space enclosed by three dimensional surfaces of the object. The volume of an object can be given in terms of area and height. The formula of the volume of an object in terms of area and height is given as follows:

Volume = Area x Height

for Pacific Ocean we have the following data:

Area = (166241700 km²)(10⁵ cm/1 km) = 1.66 x 10¹³ cm²

Height = Depth = (3940 m)(10² cm/1 m) = 3.94 x 10⁵ cm

Therefore, using these values, we get:

Volume = (1.66 x 10¹³ cm²)(3.94 x 10⁵ cm)

<u>Volume = 6.5 x 10¹⁸ cm³</u>

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If a force always acts perpendicular to an object's direction of motion, that force cannot change the object's kinetic energy.

laiz [17]

This is very good conceptual question and can clear your doubts regarding work-energy theorem.
Whenever force is perpendicular to the direction of the motion, work done by that force is zero.
According to work-energy theorem,
Work done by all the force = change in kinetic energy.

here, work done = 0.
Therefore,
0=change in kinetic energy
This means kinetic energy remains constant.
Hope this helps

5 0

2 years ago

Two boxes are connected to each other by a string as shown in the figure. The 10-n box slides without friction on the horizontal

FromTheMoon [43]

Answer:

T=7.4 N hence T<30 N

Explanation:

The figure is likely to be similar to the one attached. Writing the equation for forces we have

F-T=Fa/g where F is the force, T is tension, a is acceleration and g is acceleration due to gravity. Substituting the figures we have the first equation as

30 N - T = (30/9.81)a

Also, we know that T=F*a/g and substituting 10N for F we obtain the second equation as

T = (10/9.81)a

Adding the first and second equations we obtain

30 = 4.077471967

a Hence

$a=\frac {30}{4.077471967}=7.3575 m/s^{2}$

and T=a hence

T is approximately 7.4 N

5 0

2 years ago

Read 2 more answers

Cindy exerts a force of 40 newtons and moves a chair 6 meters. Her brother Andy pushes a different chair for 6 meters while exer

sesenic [268]

Work formula:
W = F * d
F 1 = 40 N, d 1 = 6 m;
F 2 = 30 N; d 2 = 6 m.
W ( Cindy ) = 40 * 6 = 240 Nm
W ( Andy ) = 30 * 6 = 180 Nm
The difference of their amounts if work:
240 Nm - 180 Nm = 60 nm

hope it helps!

3 0

2 years ago

Which energy source is formed when organic matter is trapped underground without exposure to air or moisture?. . A. natural gas.

nikklg [1K]

Answer:

The correct answer is option B. coal

Explanation:

Coal is made of remains of organic material including trees and other vegetation which got trapped beneath the earth’s surface or at the bottom of the swamps. After burial below the ground the organic material was acted upon by the high temperature and pressure in the absence of air to form peat. Peat after further processing for a longer period of time converted into coal

8 0

2 years ago

7. A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The oncoming water stream has

NNADVOKAT [17]

Answer:

The magnitude of the average force exerted on the water by the blade is 960 N.

Explanation:

Given that,

The mass of water per second that strikes the blade is, $\dfrac{m}{t}=30\ kg/s$