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Delicious77 [7]
3 years ago
15

A 60.kg giri roils down a frictionless hill on a skateboard. At the bottom of the hill, she is traveling at a speed of 30. m/s.

Physics
1 answer:
belka [17]3 years ago
3 0

Answer:

She won't have any kenetic energy at the bottom of the hill

Explanation:

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An object with mass 'm' is moving in a circle of radius 'R' at a constant speed of 'v.' The acceleration of the object will INCR
xenn [34]

Answer:

Explanation:

The acceleration of an object is given by the formula

a = v²/r

The acceleration of the object is bound to increase, if and only if the following are changed as well.

The mass of the object is increased,

The speed of the object is increased,

The radius of the object is contrarily decreased

Taking another look at the formula, we see that if we increase the speed of the object, it increases the acceleration. And since the radius is in the denominator, it has to be reduced for the acceleration to increase

5 0
3 years ago
A sodium vapor lamp operates by using electricity to excite the highest-energy electron to the next highest-energy level. light
viva [34]

Answer:

The energy levels are: 3s and 3p

Explanation:

<u>The sodium (Na) element, with atomic number 11 (number of protons: Z=11), has the next electronic configuration</u>:  

Z=11:  1s² 2s² 2p⁶ 3s¹ = [Ne] 3s¹    

<u>Hence, the electricity used in a sodium vapor lamp will</u> excite the electron of the energy state n=3 from the s-orbital to the next highest energy p-orbital <u>which then</u> drops back to the lower energy s-orbital by the emission of a photon <u>resulting in the production of light</u>.      

<u />

<u>The transition of the electron is</u>:

Excitation: [Ne] 3s¹ → [Ne] 3s⁰ 3p¹

Emission: [Ne] 3p¹ → [Ne] 3s¹                                                                    

So, the energy levels that are involved in the process are 3s and 3p.

Have a nice day!              

3 0
3 years ago
If I hit a guy in the mouth with my left hand even though I'm right handed, would it count as me hitting them?
Lera25 [3.4K]

Answer:

yes it would u just wouldn't be able to hit him as hard as u would if u were using your dominate hand

Explanation:

3 0
3 years ago
How do motion and Newton's laws apply to your everyday life? (all of the laws)​
Margaret [11]

Answer:

This may help

Examples of Newton's third law of motion are ubiquitous in everyday life. For example, when you jump, your legs apply a force to the ground, and the ground applies and equal and opposite reaction force that propels you into the air. Engineers apply Newton's third law when designing rockets and other projectile devices.

Explanation:

4 0
3 years ago
The magnitudes of the vectors are F = 84 N and P = 77 N. They act at angles theta = 47 deg and phi = 52 deg. Find the angle betw
Leni [432]

Answer:

The angle between the resultant of the two forces and the x-axis is 56.93°.

Explanation:

Given that,

Magnitude of the vector F = 84 N

Magnitude of the vector P = 77 N

Angle for F= 47°

Angle for P = 52°

We need to calculate the resultant vector

Using formula of resultant vector

\vec{R}=\vec{F}+\vec{P}

\vec{R}=85(\cos47i+\sin47j)+77(\cos52i+\sin52j)

\vec{R}=85\cos47+77\cos52+85\sin47+77\sin52

\vec{R}=105.35i+122.84j

We need to calculate the magnitude

R=\sqrt{(105.35)^2+(122.84)^2}

R=161.82\ N

We need to calculate the angle between the resultant of the two forces and the x-axis

Using formula of angle

\tan\theta=\dfrac{R}{105.34}

\theta=\tan^{-1}(\dfrac{R}{105.34})

Put the value into the formula

\theta=\tan^{-1}(\dfrac{161.82}{105.34})

\theta=56.93^{\circ}

Hence, The angle between the resultant of the two forces and the x-axis is 56.93°.

5 0
3 years ago
Read 2 more answers
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