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3 years ago

Giving 10$ psn card if someone help

Physics

2 answers:

Elan Coil [88]3 years ago

7 0

Answer:n 10 n = 1.0197

Explanation: Hope this helps

nikklg [1K]3 years ago

3 0

Answer:

second one

Explanation:

circle the second one

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How can one object affect the motion of another without touching it?

stealth61 [152]

By non-contact forces (e.g. gravitational force and electric force)

Explanation:

In order for an object to exert a force on another object, the two object can also be not touching each other. In fact, there exist some non-contact forces in nature.

Concerning macroscopic objects, the two main non-contact forces acting between objects are:

- The gravitational force: this force is exerted between every object that has mass. It is always attractive, and its magnitude is given by

$F=G\frac{m_1 m_2}{r^2}$

where

$G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2}$ is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between them

- The electric force: this force is exerted between objects that have electric charge. It can be either attractive or repulsive, and its magnitude is given by

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

where:

$k=8.99\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the two charges

r is the separation between the two charges

Learn more aboit gravitational and electric force:

brainly.com/question/1724648

brainly.com/question/12785992

brainly.com/question/8960054

brainly.com/question/4273177

#LearnwithBrainly

3 0

3 years ago

The small ball of mass m = 0.5 kg is attached to point A via string and is moving at constant speed in a horizontal circle of ra

babymother [125]

Answer:

d = 2.45 meters

Explanation:

Mass of the ball, m = 0.5 kg

Radius of the circle, r = 0.16 m

The angular speed of the ball around the circle is, $\omega=2\ rad/s$

The attached figure shows the whole scenario. Let $F_t$ is the force acting on the ball in tangential direction. The forces will balanced each other at equilibrium.

In horizontal direction,

$T\ sin\theta=F_t=mr\omega^2$ ................(1)

In vertical direction,

$T\ cos\theta=mg$ ...............(2)

From equation (1) and (2) :

$tan\theta=\dfrac{r\omega^2}{g}$

Also,

$tan\theta=\dfrac{r}{d}$

$d=\dfrac{g}{\omega^2}$ $d=\dfrac{9.8}{2^2}$

d = 2.45 meters

So, the value of d is 2.45 meters. Hence, this is the required solution.

3 0

4 years ago

A frictionless piston–cylinder device contains 5 kg of nitrogen at 100 kPa and 250 K. Nitrogen is now compressed slowly accordin

Arte-miy333 [17]

Answer:

The work input during this process is -742 kJ

Explanation:

Given;

Initial temperature of nitrogen T₁ = 250 K

final temperature of nitrogen T₂ = 450 K

mass of nitrogen, m = 5 kg

$PV^{1.4} = constant$

The work input during the process is calculated as;

$W = \frac{m*R(T_2-T_1)}{1-n}$

where;

R is gas constant = 0.2968 kJ/kgK

substitute given values in above equation.

$W = \frac{m*R(T_2-T_1)}{1-n} = \frac{5*0.2968(450-250)}{1-1.4} = -742 \ kJ$

Therefore, the work input during this process is -742 kJ

8 0

4 years ago

How can we help people with anger problems!?

zubka84 [21]

If someone with anger issues is struggling to control their temper, great tips are:

1. Find something in your life that you've been through that may relate to what this person is angry about, and calmly share your story. For example, Tom is abnormally angry about not getting his new tool kit delivered on time. So you say, "I understand, one time I waited weeks for my phone case to come in and it upset me very much."

2. Take the angered individual to an isolated and private area. This gives them less triggers and is safer for others.

3. Teach the person coping skills when they are NOT currently having an episode. For example, Chloe is in a good mood while she is painting her nails. So you say, "Can I show you a coping skill for anger I found online? Its awesome! Just tense up every muscle in your body as hard as you can for 5 seconds, then release the tension slowly for 10 seconds. Repeat until you feel cooled down. Try it!"

4. If someone's anger problems become a threat to themselves or those around them, take this person to see a professional. It could be serious!

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3 years ago

Read 2 more answers

Was Copernicus heliocentric or geocentric

Anuta_ua [19.1K]

Copernicus preferred the heliocentric model.

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4 years ago

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