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3 years ago

8

Paper towels attracts electrons. You rib a paper towel on a plastic rod. The paper towel becomes ____ and the plastic rod become

s _____
A. negative / positive
B. negative / negative
C. positive / negative
D. positive / positive

1 answer:

SOVA2 [1]3 years ago

5 0

B. Negative / postive

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Please help Need good grade

ivann1987 [24]

Answer:

The other angle is 120°.

Explanation:

Given that,

Angle = 60

Speed = 5.0

We need to calculate the range

Using formula of range

$R=\dfrac{v^2\sin(2\theta)}{g}$ ...(I)

The range for the other angle is

$R=\dfrac{v^2\sin(2(\alpha-\theta))}{g}$ ....(II)

Here, distance and speed are same

On comparing both range

$\dfrac{v^2\sin(2\theta)}{g}=\dfrac{v^2\sin(2(\alpha-\theta))}{g}$

$\sin(2\theta)=\sin(2\times(\alpha-\theta))$

$\sin120=\sin2(\alpha-60)$

$120=2\alpha-120$

$\alpha=\dfrac{120+120}{2}$

$\alpha=120^{\circ}$

Hence, The other angle is 120°

6 0

4 years ago

The image is the question

Evgen [1.6K]

Answer:

c is the answer because it i in a series not a parallel circut.

Explanation:

3 0

4 years ago

A sound wave is an example of a

Studentka2010 [4]

Longitudinal waves....
sounds propagates through moving waves of compression and ratification of a medium which allows longitudinal propagation

4 0

3 years ago

Read 2 more answers

Plzzz help pop asap

Zarrin [17]

Answer:

F = 200 N

Explanation:

Given that,

Mass of the object, m = 20 kg

The acceleration of the object, a = 10 m/s²

We need to find the force exerted by the object. The force acting on the object is given by :

F = ma

So,

$F=20\ kg\times 10\ m/s^2\\\\F=200\ N$

So, 200 N of force was exerted by the object.

6 0

3 years ago

When a 72 W light bulb is connected to a 298 V source, what is the current ?

Norma-Jean [14]

the current is 0.24 Amperes

Explanation

power is the amount of energy transferred or converted per unit time, it can be found using the formula

$\begin{gathered} P=I*V \\ where\text{ P is the power} \\ I\text{ is the current} \\ V\text{ is the voltage} \end{gathered}$

so

Step 1

a)let

$\begin{gathered} P=\text{ 72 Watts} \\ V=298\text{ V} \end{gathered}$

b) now, replace in the formula and solve for I

$\begin{gathered} P=I*V \\ 72\text{ W=I*298 V} \\ divide\text{ both sides by 298 V} \\ \frac{72W}{298\text{ V}}\text{=}\frac{I*298V}{298\text{ V}} \\ 0.24\text{ Amperes=I} \end{gathered}$

therefore,the current is 0.24 Amperes

I hope this helps you

6 0

2 years ago