The wheel and axle is a simple machine that reduces the friction involved in moving an object, making the object easier to transport. ... Once the object is moving, the force of friction opposes the force exerted on the object. The wheel and axle makes this easier by reducing the friction involved in moving an object.
In addition to reducing friction, a wheel and axle can also serve as a force multiplier, according to Science Quest from Wiley. If a wheel is attached to an axle, and a force is used to turn the wheel, the rotational force, or torque, on the axle is much greater than the force applied to the rim of the wheel.
<span>Wind power is produced from the
wind turbines or sails that uses air flow to convert it into mechanical power. It
is an alternative to fossil fuel burning, it is all around, renewable, clean,
produces no greenhouse gases and uses little land. The advantages of wind power
have been greatly praised by many. However, it has disadvantages. Wind power
especially at farm is noisy and may spoil the view for their neighboring people.
Also the amount of electricity depends on the strength of the wind. If no wind
is around, no electricity is produced. </span>
Answer:
They arn't usually guesses, but they are well made theorys or explanations. Its a well-substantiated explanation of facts that have been confirmed in expirements.
Answer:
Part 1. 4. 56 mi/h; Part 2. 7. 16 mi/h south; Part 3. 6. 56 mi/h north
Explanation:
Part 1. Average speed
Speed = distance/time
Distance = Austin-Waco + Waco-Austin + Austin-San Antonio
= 100 mi + 100 mi + 80 mi = 280 mi
Time = 5 h
Speed = 280 mi/5 h = 56 mi/h
Part 2. Average velocity
Velocity is a vector. It includes both speed and direction.
Assume south is positive and north is negative.
Distance = -100 mi + 100 mi + 80 mi = +80 mi
Velocity = +80 mi/5h = +16 mi/h = 16 mi/h south
Part 3. Average velocity Austin-Waco
Distance = north
If the student kept to an average speed of 56 mi/h, the average velocity was 56 mi/h north.
ANSWER:
1573.5 g
STEP-BY-STEP EXPLANATION:
Given:
Volume (V) = 150 cm³
We have that the density of silver is 10.49 g/cm³, therefore, we calculate its mass, as follows:
The mass of silver is 1573.5 grams