All categories

3 years ago

Does the plane of the ecliptic coincide with the plane of the equator? explain.

1 answer:

3 0

no it doesn't. one way to think of it is that the tropic of capricorn is the furthest south the sun's path goes, and the tropic of cancer is the northern most line that the sun traces out. since neither the tropic of capriforn nor the tropic of cancer are on the equator, the sun must be tracing out a different line and hence be on a different plane. also, if the sun was on the same plane as the equator, then we wouldn't have seasons.

You might be interested in

Bones provide both structure and protection for the body. A t. B f

vovikov84 [41]

Answer:

what are you saying man. They do provide structure.

Explanation:

6 0

4 years ago

A stone dropped from the height of 90 m with velocity does it reach to the ground

Anon25 [30]

Explanation and answer:

To solve this problem, we use the kinematics equation:

v^2-u^2=2aS .........................(1)

where

assuming the positive direction is downwards)

v = final velocity (when it reaches ground)

u = 0 = initial velocity (when it was dropped, or released, with zero vertical velocity).

a = 9.81 m/s^2 = acceleration due to gravity (on earth's surface)

S = 90m = distance travelled.

Substitute values into (1)

v^2 - 0^2 = 2*(9.81)*90

v^2 = 1765.8 m^2/s^2

v = sqrt(1765.8) m/s

= 42.02 m/s

= 42 m/s (to two significant figures).

7 0

3 years ago

What is the formula to solve this

kvasek [131]

You need two of them:

1). Power = (work done) / (time to do the work)

and

2). Work = (force) x (distance)

Using the first one:

13.3 watts = (work done) / (3 seconds)

Work done = (13.3 watts) x (3 seconds)

Work done = 39.9 joules

Using the second one:

39.9 joules = (force) x (4 meters)

Force = (39.9 joules) / (4 meters)

Force = 9.975 Newtons

7 0

3 years ago

Mechanical advantage of a second class lever is always greater than one why? give reason

malfutka [58]

Answer:

It is because the load is in between fulcrum and effort making a longer effort arm than the load arm resulting to multiplication of force and a mechanical advantage of greater than 1.

Explanation:

The distance from the fulcrum to the effort is the effort arm where as the distance from the fulcrum to the load is the load arm.

The first class lever has a mechanical advantage that varies per the position of the load with respect to effort position from the fulcrum. They have the fulcrum at the middle. For example, a beam balance and a pliers. The formula to remember is FLE for easy categorization of the lever classes.

The second class lever , the load is at the middle.For example a wheel barrow and a bottle opener. In this class, the effort arm is longer than the load arm.The effort is force multiplication making the mechanical advantage to be greater than 1.

The third class of lever has effort in the middle.For example a spade or a knife.In this class effort arm is shorter than the load arm, causing change in direction of force. The effect is a mechanical advantage less than 1.

5 0

3 years ago

(9x10^2) + (1x10^2) 10x10^4 10x10^3 1x10^4 1x10^3

PSYCHO15rus [73]

Answer:

10 x 10⁴

I hope it's helps you

4 0

3 years ago