Answer:
Materials which do conduct electricity, like copper, are called conductors. In the middle are materials known as semiconductors, which don't conduct as well as conductors, but can carry current.
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Answer:
<h3> B. 4 m/s</h3>
Explanation:
The formula for Speed is distance per time.
<h3>Therefore Speed = Distance / Time</h3>
<u>Data</u>
D = 40 m
T = 10 sec
S = ?
<h3> Speed = 40m /10sec</h3>
To find the speed , divide the distance by the time.
Note : the unit for Speed is meter /second
<h3> Speed = 4 m/s</h3>
Therefore the speed of the wave, the surfer is riding on is 4 m/s.
Answer:
D. accelerated
Explanation:
According to Newton's first law of motion, an object always remains in its state of rest or in uniform motion until an external unbalanced force is acted upon the object. This means if an external unbalanced force is acted on the object, it will come to a non-uniform motion i.e., an accelerated motion.
Let me first get you clear that uniform motion is determined by a constant velocity and a state of rest is considered by a zero velocity or speed. But, here we have an unbalanced force acting on the object. This means the object will change its velocity and hence, it has an accelerated motion.
Answer: 14
Explanation:
Force(normal)*coefficient
