What are the forces that resist motion that make Newton's 1st Law hard to completely visualize on Earth?

Answer:

b) vary with the frequency of the light

Explanation:

The phone electric effect can be expressed as

K.E=(hv -W•)

Where K.E is the Kinectic energy

W• = work function of the metal

ν =frequency of the radiation

h = Planck's constat

Then, we can see that K.E is proportional linearly to "v" in the equation above.

Therefore, When light is directed on a metal surface, the kinetic energies of the photoelectrons vary with the frequency of the light

Answer:b

Explanation: i took the test and b was correct

Answer:

At terminal velocity, the drag force = mass x g

Explanation:

Force = 80 kg x 9.8 m/s2 = 784 kgm/s2 = 784 N

Answer:

[tex]a=114\ m/s^2[/tex]

Explanation:

Given that,

Mass of an object, m = 3.68 kg

It is whirled in a horizontal circle of radius 881 cm or 8.81 m

The object completes 10.8 revolutions every 18.8 s.

We need to find the centripetal acceleration of the object. It is given by the formula as follows :

[tex]a=\omega^2 r[/tex] ...(1)

Where [tex]\omega[/tex] is angular velocity

10.8 revolutions = 67.85 rad

[tex]\omega=\dfrac{67.85\ rad}{18.8\ s}\\\\=3.6\ rad/s[/tex]

Put values in equation (1)

[tex]a=3.6^2\times 8.81\\\\a=114\ m/s^2[/tex]

So, the centripetal acceleration of the object is [tex]114\ m/s^2[/tex].

Answer:

Option b

Explanation:

The formula of momentum is [tex]p=mv[/tex]

where p is the momentum , m is the mass in kg and v is the velocity in m/s, so

a) momentum is

[tex]p=mv\\p=5(2)\\p=10[/tex]

b) momentum is

[tex]p=mv\\p=4(3)\\p=12[/tex]

c) momentum is

here since the rock is sitting on top of a hill which means the object is stationary or in other words the object is at rest, which means if an object is at rest the velocity is 0m/s so momentum is zero of a stationary object because

[tex]p=mv\\p=200(0)\\p=0[/tex]

d) momentum is

[tex]p=mv\\p=0.0025(200)\\p=0.5[/tex]

so the highest momentum is in part b which is 12 so option b is our answer.

Answer:

c

Explanation:

Answer: Solar radiation reflects off the lighter colours, away from the car, thus keeping the car cool

Explanation: This is because lighter colors reflect a good amount of radiation while darker colors absorb it. Just like, Antarctica hasn't completely melted because it reflects a lot of the heat that is acting upon it. Or, you notice that you get hotter when you wear a black shirt opposed to a white one.

Answer:

Living thing

Explanation:

Nonliving things do not move by themselves, grow, or reproduce.

Answer:

Living

Explanation:

Unless you cut the tree, making that thang dead- its living

I think A but I dont really know

Answer:

Chemical etching is a process of printed circuit board (PCB) manufacturing that provides  many advantages over mechanical methods.

Explanation:

There's one! UvU hope this helped in whatever you're in for! <3

Good Luck!

Answer:

45 degrees

Explanation:

Given that the coefficient of friction, [tex]\mu=1.0[/tex]

Let the angle of the ramp be [tex]\theta[/tex].

The gravitational force acting downward [tex]=mg[/tex]

The normal reaction by the ramp on the box, [tex]N=mg\cos\theta[/tex]

So, the maximum frictional force that can act on the box, [tex]f= \mu N[/tex]

The force along with the plane in the direction of sliding, [tex]F = mg\sin\theta[/tex]

When the box begins sliding, the F must have to overcome the frictional force,f.

So, F=f

[tex]mg\sin\theta=\mu N \\\\mg\sin\theta=\mu mg\cos\theta \\\\\frac {\sin\theta}{\cos\theta}=\mu \\\\\tan\theta=\mu \\\\\theta=\tan^{-1}\mu \\\\[/tex]

Putting the value of \mu, we have

[tex]\theta=\tan^{-1}1[/tex]

[tex]\theta=45[/tex] degrees.

Hence, the angle of the ramp with respect to the ground when the box begins sliding is 45 degrees.

Answer: A bad, maladaptive, unhealthy or destructive coping mechanism is one where the behavior does not resolve the problem in the long-term and may actually increase the harm. Unhealthy coping strategies may feel like they are having the desired effect in the short term.

Explanation: Yes, it was from google...

Answer:

∆p=(m2v)kg.m/s

Explanation:

∆p=mv where v=2v. hence ∆p=m2v

Answer:

c. 2p

Explanation:

edge 2021

Answer:

first one 31

second one 23

Explanation:

on edge ;))

Answer:   Hawk.

Explanation: I dont know for sure, but thats what it looks like to me.

Answer:

A.) Most nonmetals are gaseous, but some are liquid or solid

Explanation:

Answer:

a

Explanation:

Answer:

A) Elastic Energy, Kinetic Energy, and Gravitational Potential Energy

Explanation:

Hope this helps!

Answer:

7.15 m

Explanation:

From the question given above, the following data were obtained:

Height (h) = 10 m

Initial velocity (u) = 5 m/s

Horizontal distance (s) =?

Next, we shall determine the time taken for the shirt to get to the ground. This can be obtained as follow:

Height (h) = 10 m

Acceleration due to gravity (g) = 9.8 m/s²

Time (t) =?

h= ½gt²

10 = ½ × 9.8 × t²

10 = 4.9 × t²

Divide both side by 4.9

t² = 10 / 4.9

t² = 2.04

Take the square root of both side

t = √2.04

t = 1.43 s

Finally, we shall determine the horizontal distance travelled by the shirt. This can be obtained as follow:

Initial velocity (u) = 5 m/s

Time (t) = 1.43 s

Horizontal distance (s) =?

s = ut

s = 5 × 1.43

s = 7.15 m

Thus, the shirt will land at 7.15 m away from the stage. Thus, to catch the shirt, you must be at a point 7.15 m away from the stage.

Answer:

1000 seconds.

Explanation:

Answer:

100 Watts

Explanation:

These equations are needed to work out the answer:

force: 10 kg* 2m/s= 20

work done: 20* 10m=200

power: 200/2=100

Answer:

 v₂ = 2.5 v₁

car leaves at 2.5 times the speed of the minivan

Explanation:

This is an exercise of conservation of the momentum, to solve it we create a system formed by the minivan and the car, therefore during the crash the forces are internal and the momentum is conserved.

Initial instant. Before the crash

        p₀ = M v₁+ 0

Final moment. After the crash

        [tex]p_{f}[/tex] = M 0 + m v₂

how momentum is conserved

         p₀ = p_{f}

         M v₁ = m v₂

         v₂ = [tex]\frac{M}{m}[/tex] v₁

let's calculate

        v₂ = 2000/800 v₁

        v₂ = 2.5 v₁

therefore the car leaves at 2.5 times the speed of the minivan

Answer:

health factors that could harm you or your offspring

Answer:

\frac{2+\sqrt{3}}{2}

Explanation:

so we simplify tthe denominator first

[tex](1-\sqrt{3})^2=[/tex][tex]4-2\sqrt{3}[/tex]

so the new fraction is:[tex]\frac{1}{4-2\sqrt{3}}[/tex]

We'll ratinalize the fraction to get: [tex]\frac{2+\sqrt{3}}{2}[/tex]

Centripetal acceleration ac is the acceleration experienced while in uniform circular motion. It always points toward the center of rotation. It is perpendicular to the linear velocity (tangential speed) v and has the magnitude:

[tex]a_c = \dfrac{v^2}{R}[/tex]

Solving for v:

[tex]v = \sqrt{a_c R} = \sqrt{(250\;m/s^2)(0.50\;m)} = 5\sqrt{5}\;m/s \approx 11.18\;m/s[/tex]

The yo-yo’s tangential speed 11.18 m/sec.

The speed of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.

Centripetal acceleration ac is the acceleration experienced while in uniform circular motion. It always points toward the center of rotation. It is perpendicular to the linear velocity (tangential speed) v and has the magnitude:

[tex]a_{c} = v^2/r[/tex]

Solving for v

[tex]v = \sqrt{a_{c}r }[/tex] = 11.18 m/sec

The yo-yo’s tangential speed 11.18 m/sec.

To learn more about speed refer to the link:

brainly.com/question/28224010

 #SPJ2

Answer:

Potential energy

Explanation:

Potential energy is stored energy and the energy of position––gravitational energy. There are several forms of potential energy. Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms.

- Scientific Forms of Energy_ Stored Energy, Kinetic Energy ...ei.lehigh.edu › learners › energy › readings › energy_basics

Answer:

Option B

Explanation:

Displacement  = Area under the velocity-time graph

So to find the displacement of a particle from 7 to 8 seconds we take the triangle and calculate its area.

[tex]Area\ of\ a\ right\ angled\ triangle = \frac{1}{2}*(base)*(height) \\\\Area\ of\ a\ right\ angled\ triangle = \frac{1}{2}*(1)*(3) \\\\Area\ of\ a\ right\ angled\ triangle = 1.5[/tex]

So the displacement is 1.5 meters

I have an uploaded image so you can understand it better hope it helps

Answer: 20

Explanation:

If Jake pushes with 20 N of force, the force that he would feel backwards away from Amir is 20N

Force simply means the strength or energy that can later the position of an object. Force can also be described as a push or pull.

It should be noted that since Jake pushes with 20 N of force, the force that he would feel backwards away from Amir will be the exact force that was used in pushing.

This will therefore be 20 Newton as well.

Read related link on:

https://brainly.com/question/18038995