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3 years ago

Which statement describes what happens when a balloon is rubbed with a wool cloth?

2 answers:

8 0

Electrons move from the atoms in the cloth to the atoms in the balloon, causing the balloon to have a negative charge

Hope this helps!!!

sladkih [1.3K]3 years ago

4 0

Yes, I just took this test, and can 100% confirm the correct answer to this question is electrons move from the atoms in the cloth to the atoms in the balloon, causing the balloon to have a negative charge.

Hope this helps, and have a great day! :)

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Un cuerpo de 20 kg es lanzado verticalmente hacia arriba con una velocidad de 30 m/s. ¿Cuánto tiempo tardará el cuerpo en alcanz

nata0808 [166]

Answer:

tu hermana con salsa de concha

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3 years ago

Planet z has a rocky surface. at height 3240 km above the surface, the gravitational acceleration is what is the radius of the p

jolli1 [7]

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4 years ago

Two vectors A and B are added to give a resultant R. The components of A are Ax = -8.0 units and Ay = 6.0 units and the componen

Georgia [21]

Answer:

10.09 units

Explanation:

For the A

Ax = -8.0 units

Ay = 6.0 units

The resultant vector = Ra = $\sqrt{A^2_{x} + A^2_{y} }$

Ra = $\sqrt{(-8)^2 + 6^2 }$ = 10 units

For B

Bx = 1.0 units

By = -1.0 units

The resultant vector = Rb = $\sqrt{B^2_{x} + B^2_{y} }$

Rb = $\sqrt{1^2 + (-1)^2 }$ = $\sqrt{2}$ units

Adding these two vectors A and B together, magnitude of vector R is

R = $\sqrt{R^2_{a} + R^2_{b} }$

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4 years ago

A man drags a 71-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. The

Flura [38]

Answer:

T = 540 N (to two significant digits)

Explanation:

Let the crate dimension L be from strap attachment to floor contact

Let T be the strap tension

sum moments about the floor contact point to zero

mg[½Lcos25] - Tsin61[Lcos25] + Tcos61[Lsin25] = 0

L is common to all terms, so divides out.

½(71)(9.8)cos25 = T(sin61cos25 - cos61sin25)

T = (71)(9.8)cos25 / (2(sin61cos25 - cos61sin25))

T = 536.428020...

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3 years ago

The ____ phase of the SDLC includes four main activities: requirements modeling, data and process modeling, object modeling, and

nataly862011 [7]

Answer:

The system analysis phase of the SDLC includes four main activities: requirements modeling, data and process modeling, object modeling, and consideration of development strategies.

Explanation:

SLDC is a Software Development Life Cycle. It is basically a process of designing, developing and testing high-quality software by a software developing industries.
It has four processes as mentioned in the question which is a process for improving and refining the quality of software.
SLDC is a methodology that is used by every software company to develop a fine and high-quality software.

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4 years ago