Answer:
If the cart is being pushed at a constant speed, then the acceleration in the direction of motion is zero. Hence, the force in the direction of the motion is zero, according to Newton's Second Law.
For simplicity, I will denote the direction along the inclined ramp as x-direction.
In the question the value of the force is not clearly given, so I will denote it as 
Here the angle between the applied force and the x-direction is 12° + 17° = 29°
The x-component of the weight of the cart is equal to sine component of the weight.
Since the cart is rolling on tires the kinetic friction does no work.
Work done by the applied force:
Work done by the weight of the cart:
Since the x-component of the weight is in the -x-direction, its work is negative.
Conveniently, the total work done on the particle is zero, since its velocity is constant.
The correct answer is that it converts mechanical energy to electrical energy.
Answer:
26000 years
Explanation:
Precession describes the angular motion of the Earth's body. Since the attitude of telescopes relative to the Earth's body can be controlled with high accuracy, and telescopes can measure the direction of incoming light also with high accuracy, the motion of Earth is under permanent high precision monitoring. Thus the basic numerical descriptor of precission, an angular rate of 5029.0966 seconds of arc per Julian century, traditionally denoted p (for precession) is a measured value from observed coordinate changes of thousands of stars over, say, two centuries. The understanding of this value in terms of forces acting on an oblate Earth from the Moon is well understood so that an extrapolation back and forth over a few full cycles contains little uncertainties. Of course, you can find details on the coordinate transformations mentioned above (the direct observational effect of precession) on the net. I was surprised to see that the Wikipedia article on precession covers the astronomical aspect very poorly. You thus better look for other sources.
The arrangements of the water molecules they begin to spread apart. As the water(ice) melts the molecules develop fewer compact and start juddering harder until the ice has changed state into liquid.
Answer:
An aircraft, flying in the vicinity of 18,000 ft altitude from west to east over the US at 12 Z today, will __LOSE___ altitude if the altimeter is not corrected
