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3 years ago

What precautions should you take when working with electronic equipment?

Physics

1 answer:

ollegr [7]3 years ago

7 0

Answer:

Be sure to unplug the power source of all electrical equipment before working on it. Always pull from the plug, not the cord. Always wear proper non conductive clothing – insulated gloves, non conductive protective apparel and shoes with insulated soles. Avoid loose clothing or ties.

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What happens to the orbit time as the distance increases.

Maslowich

The orbital period increases if the orbital distance is increased.

6 0

3 years ago

A 25 N force at 60° is required to set a crate into motion on a floor. What is the value of the static friction?

True [87]

The normal force of the force given is calculated through the equation,

Fn = F(sin θ)
where Fn is the normal force, F is the force, and θ is the angle.

Fn = (25 N)(sin 60°) = 21.65 N

The x-component of the force applied is,
Fx = (25 N)(cos 60°) = 12.5 N

The value of the coefficient of static friction is calculated through the equation,
F = μFn
μ = Fx / Fn = 12.5 N / 21.65 N = 0.577

3 0

3 years ago

Astronaut Mark Kelly and his crew traveled to the International Space Station in the space shuttle. The shuttle burned off all r

Nitella [24]

A couple of things, if the shuttle burned all of it's fuel before entering Earth's atmosphere then that means that the shuttle was accelerating towards Earth until it ran out of fuel. At that point, there is little to no air resistance (friction) by the lack of an atmosphere so it keeps accelerating due to Earth's gravitational force. The closer the shuttle gets to Earth the stronger the gravitational pull the shuttle experiences. Note that, once the shuttle reaches Earth's atmosphere it will cause significant amount of friction and thus will cause the shuttle to slow down.

6 0

4 years ago

Read 2 more answers

Cross product and its properties

bearhunter [10]

The length of the cross product of two vectors

The scalar triple product of the vectors a, b, and c

The volume of the parallelepiped determined by the vectors a, b, and c is the magnitude of their scalar triple product.

<u>Explanation</u>:

The length of the cross product of two vectors is | a $\times$ b | = |a| |b| sin θ

The length of the cross product of two vectors is equal to the area of the parallelogram determined by the two vectors (see figure below).

Anticommutativity:

| a $\times$ b | = - | b $\times$ a |

Multiplication by scalars:

(ca) $\times$ b = c (a $\times$ b) = a $\times$ (cb)

Distributivity:

a $\times$ (b + c) = (a $\times$ b) + (a $\times$ c)

The scalar triple product of the vectors a, b, and c:

a . (b $\times$ c) = (a $\times$ b) . c

The magnitude of the scalar triple product is the volume of the parallelepiped of the vectors a, b, and c.

The vector triple product of the vectors a, b, and c is given as

a $\times$ (b $\times$ c) = (a.c) b - (a.b) $\times$ c

4 0

3 years ago

Suppose you place an object 8 cm in front of a converging lens and the image appears 16 cm on the other side of the lens. What i

Marianna [84]

Answer:

5.33 cm

Explanation:

The lens equation states that:

$\frac{1}{f}=\frac{1}{p}+\frac{1}{q}$

where

f is the focal length

p is the distance of the object from the lens

q is the distance of the image from the lens

In this problem,

p = 8 cm

q = 16 cm ( the sign is positive since the image is real, which means it is formed on the other side of the lens)

Substituting into the equation,

$\frac{1}{f}=\frac{1}{8 cm}+\frac{1}{16 cm}=\frac{3}{16 cm}$

$f=\frac{16}{3}cm=5.33 cm$

3 0

3 years ago