Calculate the magnitude of the linear momentum for each of the following cases

a.) a proton with mass 1.67 ×10−27 kg moving with a velocity of 6 x 106 m/s. answer in units of kg x m/s.
b.) a 1.6 g bullet moving with a speed of 374m/s to the right. answer in units of kg x m/s.
c.) a 8 kg sprinter running with a velocity of 11.8 m/s. answer in units of kg x m/s.
d.) earth (m=5.98 x 1024 kg) moving with an orbital speed equal to 29700 m/s. answer in units of kg x m/s.

(a)

(b)

(c)

(d)

Explanation:

The linear momentum is defined as:

 (1)

Where m is the mass and v is the velocity

a.) A proton with mass moving with a velocity of .

Replacing those values in equation (1) it is gotten:

So, it has a linear momentum of

b.) A 1.6 g bullet moving with a speed of 374m/s to the right.

Notice that in this case it is necessary to express the mass of the bullet in terms of kilograms:

⇒

c.) A 8 kg sprinter running with a velocity of 11.8 m/s.

d.) Earth () moving with an orbital speed equal to 29700 m/s.

answer: option c. i.e. electric current flowing “downhill” from the negative electrode to the positive electrode in a battery

explanation:

the water analogy to the circuits define the pipes (water flows) to the electric current. now, we know that the electric current flows from the positive terminal to the circuit (as shown in the diagram attached).

hence, option c is the correct answer.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation: