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creativ13 [48]
3 years ago
13

The main difference between speed and velocity involves

Physics
2 answers:
mars1129 [50]3 years ago
6 0

Velocity is speed plus the direction of the speed.

miss Akunina [59]3 years ago
3 0

The Correct answer to this question for Penn Foster Students is: Direction

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A uniform solid disk and a uniform hoop are placed side by side at the top of an incline of height h. If they are released from
svlad2 [7]

Answer:

) the uniform disk has a lower moment of inertia and arrives first.

Explanation:

(a) the uniform disk has a lower moment of inertia and arrives first.

(b) Let's say the disk has mass m and radius r, and

the hoop has mass M and radius R.

disk: initial E = PE = mgh

I = ½mr², so KE = ½mv² + ½Iω² = ½mv² + ½(½mr²)(v/r)² = (3/4)mv² = mgh

m cancels, leaving v² = 4gh / 3

hoop: initial E = Mgh

I = MR², so KE = ½MV² + ½(MR²)(V/R)² = MV² = Mgh

M cancels, leaving V² = gh

Vdisk = √(4gh/3) > Vhoop = √(gh)

3 0
4 years ago
The process of recording the strength of the contraction of a muscle when it is stimulated by an electrical current is known
Naddik [55]
i dont know the answer of your question correctly

3 0
4 years ago
8. two +1 C charges are separated by 3000m. What is the magnitude of the electric force between them?
Sidana [21]

Answer:

1000 N

Explanation:

The magnitude of the electrostatic force between two charged object is given by

F=k\frac{q_1 q_2}{r^2}

where

k is the Coulomb constant

q1, q2 is the magnitude of the two charges

r is the distance between the two objects

Moreover, the force is:

- Attractive if the two forces have opposite sign

- Repulsive if the two forces have same sign

In this problem:

q_1=q_2=+1C are the two charges

r = 3000 m is their separation

Therefore, the electric force between the charges is:

F=(9\cdot 10^9)\frac{(1)(1)}{3000^2}=1000 N

8 0
3 years ago
. Potential energy is a vector quantity True or false?
DedPeter [7]
False. Energy in any form is a scalar quantity. 
6 0
3 years ago
When electrons are moving it is called<br> A field<br> B electricity<br> C friction<br> D attraction
Taya2010 [7]
Im pretty sure it’s in a field
8 0
3 years ago
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