3 years ago

How is a ground wire a safety precaution

1 answer:

5 0

When the metal case of a piece of equipment is connected to ground through a ground wire, any fault current is conducted by the wire, rather than by someone who may touch the case.

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The velocity of an object includes its speed and____?

mr_godi [17]

it includes an objects speed and direction

6 0

3 years ago

A 75.0-kg person climbs stairs, gaining 2.50 m in height. Find the work done to accomplish this task.

ololo11 [35]

Answer:

$W=1837.5J$

Explanation:

A force exerts work when there is a displacement of its point of application in the direction of that force. Therefore, the work done by a system is defined as the inner product between the applied force and the displacement:

$W=\vec{F}\cdot \vec{d}\\W=Fcos\theta d$

In this case, we have:

$F=mg\\h=dcos\theta$

So, replacing this:

$W=mgh\\W=75kg*9.8\frac{m}{s^2}*2.5m\\W=1837.5J$

4 0

3 years ago

state the type of force which provide the needed centripetal force in the following instance :an electron orbiting the nucleus

Vladimir [108]

i think the answer is electrostatic force hope this helps u stay safe

6 0

3 years ago

The second hand on a clock is 3.00 cm long. What is the speed of the outermost tip of that second hand

Gnom [1K]

In 60 minutes or 3600 seconds, the tip of the minute hand traverses the circumference of a circle with radius 3.00 cm, so it moves with a tangential speed of

(3.00 cm)/(3600 s) ≈ 0.00083 cm/s = 8.3 μm/s

4 0

3 years ago

The record time for a Tour de France cyclist to ascend the 1100-mm-high Alpe d'Huez is 37.5 minmin. The rider and his bike had a

katen-ka-za [31]

Answer:

1945.6 W

Explanation:

We are given that

Height,h=1100 m

Time,t=37.5 min= $37.5\times 60=2250 s$