What is the motion of the object?
F = 90 N
F3 = 60 N
F = 20 N
F2 = 90 N
Constant speed to the left
Accelerating to the left
Accelerating to the right
Constant speed to the right

Answer:

Explanation:

v₁ , v₂ be velocity of flow of water at the surface and hole , h₁ and h₂ be height of surface and hole  , P₁ and P₂ be pressure at surface and hole .

Using Bernoulli's formula for flow of liquid in tank

1/2 ρ v₁² + ρgh₁ + P₁ = 1/2 ρ v₂² + ρgh₂ + P₂

P₁ = P₂

1/2 ρ v₁² + ρgh₁  = 1/2 ρ v₂² + ρgh₂

1/2  ( v₁² -  v₂² ) =  g(h₂ -h₁ )

v₁² -  v₂² =  - 2gd

a₁ v₁ = a₂ v₂

π R² v₁ = π r² v₂

v₁ =  r² v₂ / R²

v₁² -  v₂² =  -2gd

r⁴ v₂² / R⁴ - v₂² = -2gd

v₂² ( R⁴ -  r⁴ ) = 2gd R⁴

v₂² = 2gd R⁴ / ( R⁴ -  r⁴ )

v₂ = √ [ 2gd R⁴ / ( R⁴ -  r⁴ ) ]

Answer:

initial velocity = 7.44 m/s   (3 s.f.)

Explanation:

a = 6.24 m/s²     t = 0.300 s     v = 9.31 m/s       u = ?

                               v = u + at

                       9.31 = u + (6.24 x 0.300)

                             9.31 = u + 1.872

                                    u = 7.438

                                    = 7.44 m/s       (3 s.f.)

Hope this helps!

Height is 7.05 m and not 7.05 mm

Answer:

9.603 m/s

Explanation:

We are dealing with rotation, so velocity of centre of mass is given by;

v_cm = Rω

Since we are working with a solid cylinder, moment of inertia of the cylinder is; I = ½mR²

Since it is rolled from the top to the bottom, at the top it will have potential energy(mgh) while at the bottom it will have kinetic energy (rotational plus translational kinetic energy).

Using conservation of energy, we have:

P.E = K.E_t + K.E_r

Formula for rotational and kinetic energy here are;

K.E_t = ½mv²

K.E_r = ½Iω²

mgh = ½mv² + ½Iω²

Since we want to find translational speed(v), let's get rid of ω.

Earlier, we saw that v_cm = Rω

Thus; ω = v/R

Also, we know that I = ½mR².

Thus;

mgh = ½mv² + ½(½mR²)(v/R)²

This gives;

mgh = ½mv² + ¼mv²

Divide through by m to get;

gh = v²(½ + ¼)

gh = ¾v²

Making v the subject gives;

v = √(4gh/3)

v = √((4 × 9.81 × 7.05)/3)

v = 9.603 m/s

Answer:

No  it will not make to the top of the hill  

Explanation:

From the question we are told that

   The velocity is  [tex]v = 4 \ m/s[/tex]

    The height of the hill is  [tex]h = 1 \ m[/tex]

Generally from the law of energy conservation we have that

   The kinetic energy of the pluck at the level position =  The potential energy of the pluck at the maximum height the  pluck can get  to  

So

       [tex]\frac{1}{2} * m * v^2 = m * g * h_{max}[/tex]

=>    [tex]\frac{1}{2} * v^2 = g * h_{max}[/tex]

=>     [tex]h_{max} = \frac{0.5 * v^2}{g}[/tex]

=>     [tex]h_{max} = 0.8163 \ m[/tex]

Given that the maximum height which the pluck can get to at this speed given in the question is less than the height of the hill then conclusion will be that the pluck will not make it to the top of the hill

Answer:

Because heat can be converted from one form to another.

Heat is also does work, for example it sets water molecules into motion when boiling ( convection currency ).

since energy is the ability to do work, heat does work.

Answer:

1)The heat from the sun is one of the causes of rainfall.

2) It also causes thermal equilibrium on the earth's surface.

Explanation:

1) Heat from the sun heard of the water bodies, covers some to vapor which is taking up too form rains and snow.

2) Without the heat of the sun the only source of heart for the earth would be the geothermal heat (ie. the heat from within the earth). This type of heart wouldn't be enough to keep us warm because of the presence of the glaziers

Answer:

The difference is in who or what is observing the speed.

Explanation:

Giving that speed is relative between the objects and the reference point from which it is being observed.

It is concluded that speed alone has no direct effect on a moving object, hence it is just a determining unit for the difference in distance between two objects.

Therefore, in this case, the difference is in who or what is observing the speed.

Answer:

Electric energy produced in the month of April is 18 kWh

Explanation:

Given

P = 1200 W = 1.2 kW      

Use time per day = 30 minutes = 1 / 2 hrs

We know,

No. of days in April = 30 days

Total time iron being used

T = 1 / 2 * 30 = 15 hrs

We know,

Energy consumed = Pt

Substituting the value of P and T

= 1.2 kW * 15 hr

= 18 kWh    

Hence,

Electric energy produced in the month of April is 18 kWh

Answer:

you select what ever feels right to you if you think what it tells you is true then you would say strongly agree and if you don't agree then it would be any of the other options

Answer:

The EM radiation most immediately lower-frequency than visible light is called infrared, and the EM radiation most immediately higher-frequency is called ultraviolet.

Explanation:

kinetic to gravitational

Answer:

shrek

Explanation:

allstar

Answer:

The value is  [tex]L = 9.164 *10^{-5} \ H[/tex]

Explanation:

From the question we are told that

    The length of the solenoid is [tex]l = 30 \ cm = 0.3 \ m[/tex]

     The number of turns is  [tex]N = 250 \ turns[/tex]

    The cross-sectional  area is  [tex]A = 3.5 \ cm^2 = 3.5 *10^{-4} \ m^2[/tex]

Generally the self  inductance of the solenoid is  

       [tex]L = \frac{\mu_o * N^2 * A }{ l }[/tex]

Here  [tex]\mu_o[/tex] is the permeability of free space with value  [tex]\mu_o = 4\pi *10^{-7} \ T \cdot m/A[/tex]

So

       [tex]L = \frac{ 4 \pi*0^{-7} * 250^2 * 3.5 *10^{-4} }{ 0.3 }[/tex]

=>     [tex]L = 9.164 *10^{-5} \ H[/tex]

Answer:

122.5 m

Explanation:

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

Time (t) = 5 s

Depth (h) =?

The depth of the well can be obtained as:

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

h = ½gt²

h = ½ × 9.8 × 5²

h = 4.9 × 25

h = 122.5 m

Thus, the depth of the well is 122.5 m

Answer:

a. up

Explanation:

As per the rule of Fleming left hand, the three fingers should be places in a perpendicular manner i.e. mutually also.

The fore finger depicts the field direction

The middle finger depicts the velocity

And, the thumb finger depicts the force direction that experienced on that particle i.e. charged

So the electrons would be deflects to up

Hence, the correct option is a.

Answer:

Measurements/cor. units      Resistor 1    Resistor 2    Resistor 3      Total

V (volts)                                       24V              16V            12.63V        120 V

I (A – amperes)                          4.8A             2.13A          1.34A          5.45A

R (Ω – ohms)                            5.0 Ω            7.5 Ω           9.5 Ω            22Ω

P (W – work)                            115.2W          34.08W      16.92W        2,640W

Answer:

[tex]W=\frac{773}{4.45}=173.76 l b f[/tex]

Explanation:

[tex]W=\frac{G \cdot m_{e} \cdot m}{(R+h)^{2}}[/tex]

The law of gravitation

[tex]G=6.673\left(10^{-11}\right) m^{3} /\left(k g \cdot s^{2}\right)[/tex]

Universal gravitational constant [S.I. units]

[tex]m_{e}=5.976\left(10^{24}\right) k g[/tex]

Mass of Earth [S.I. units]

[tex]m=89 kg[/tex]

Mass of a man in a spacecraft [S.I. units]

[tex]R=6371 \mathrm{~km}[/tex]

Earth radius [km]

Distance between man and the earth's surface

[tex]h=261 \mathrm{~km} \quad[\mathrm{~km}][/tex]

ESULT [tex]W=\frac{6.673\left(10^{-11}\right) \cdot 5.976\left(10^{24}\right) \cdot 89}{\left(6371 \cdot 10^{3}+261 \cdot 10^{3}\right)^{2}}=773.22 \mathrm{~N}[/tex]

[tex]W=\frac{773}{4.45}=173.76 l b f[/tex]

Answer:

A: All of the above

Explanation:

The instantaneous speed of an object is simply the current seed of the object at any given time. The SI unit is m/S and it is a vector quantity.

Therefore, according to the given options, they all have SI units that are consistent with distance and time which makes them all an example of instantaneous speed.

Answer:

[tex]v=10m/sec[/tex]

Explanation:

From the question we are told that

Radius of vertical r= 8m

Force exerted by passengers is 1/4 of weight

Generally the net force acting on top of the roller coaster is give to be

[tex]F_N+Fg[/tex]

where

[tex]F_N =forceof the normal[/tex]

[tex]Fg= force due to gravity[/tex]

Generally the net force is given to be [tex]FC(force towards center)[/tex]

[tex]F_C =F_N + Fg[/tex]

[tex]F_N =F_C -Fg[/tex]

[tex]F_N=F_C-F_g[/tex]

[tex]F_N=\frac{mv^2}{R} -mg[/tex]

Mathematical we can now derive V

[tex]m_g + \frac{8m}{4}= \frac{mv^2}{8}[/tex]

[tex]\frac{5mg}{4} =\frac{mv^2}{8}[/tex]

[tex]v^2 =\frac{40*10}{4}[/tex]

[tex]v=10m/sec[/tex]

Therefore the speed of the roller coaster is given ton be [tex]v=10m/sec[/tex]

[tex]v=10m/s[/tex]

Given:

Radius of vertical r= 8m

To find:

Force exerted by passengers is 1/4 of weight

Generally the net force acting on top of the roller coaster is give to be

[tex]F_N+F_g[/tex]

where

[tex]F_N=\text{Force of Normal}[/tex] and [tex]F_g=\text{Force due to gravity}[/tex]  

Generally the net force is given to be [tex]FC- \text{Force towards centre}[/tex]

[tex]F_C=F_N+F_g\\\\F_N=F_C+F_g\\\\F_N=\frac{mv^2}{r} -mg[/tex]

Mathematically we can now derive V

[tex]mg-\frac{8m}{4} =\frac{mv^2}{8}\\\\\frac{5mg}{4}=\frac{mv^2}{8}\\\\v^2=\frac{40*10}{4} \\\\v=10m/s[/tex]

Therefore, the speed of the roller coaster is given to be 10m/s.

Learn more:

brainly.com/question/25834521

Answer:

The correct option is "a plasma tail"

Explanation:

Gases escaping from a comet are ionized by ultraviolent rays from the sun. These ionized gases are then carried away from the sun by the solar wind to form the plasma tail. While the plasma tail is made up of gases, the dust tail is made up of tiny solid particles (dust) that escapes from the comet and are also pushed away from the sun.

Answer:

both magnitude and direction

Explanation:

When an object moves in a circular path, its motion is called uniform circular motion. In this motion, the force acting on it is centripetal force and it is moving under centripetal acceleration. This type of force acts towards the centre of the circle.

In this type of motion, the speed remains constant while the velocity keeps on changing. The object's centripetal  acceleration remains constant in magnitude as well as direction.

Hence, the correct option is (3).

If an object is moving with constant speed in the circular path the object's centripetal  acceleration remains constant in both magnitude and direction

The formula for calculating the centripetal acceleration of an object is expressed as:

[tex]a =\frac{v^2}{r}[/tex]

Hence if an object is moving with constant speed in the circular path the object's centripetal  acceleration remains constant in both magnitude and direction

Learn more on centripetal acceleration here: https://brainly.com/question/79801

Answer:

a. the polar front

Explanation:

When the surface winds move towards the pole at angles that range from 30 to 60 degrees, they usually collide with cold air moving towards the equator. Since these two winds do not mix with ease, the polar front helps to separate them.

The three-cell model assumes that the earth is entirely filled with water thus removing any interactions with the land. It also assumes that there are no seasons nor Coriolis force.

Answer:

B. 6.6 m

Explanation:

Given;

speed of Jared , v = 7.1 m/s

time taken, T = 5.8 s

let the radius of the traffic circle = r

The speed of Jared is calculated as;

[tex]v = \frac{2\pi r}{T}[/tex]

Where;

v is speed of Jared

T is period of the motion

r is radius of the traffic circle

[tex]r = \frac{vT}{2\pi} \\\\r = \frac{7.1 \ \times \ 5.8}{2\pi} \\\\r = 6.55 \ m\\\\r = 6.6 \ m[/tex]

Therefore, the radius of the traffic circle is 6.6 m.

Answer:

the final angular speed of the wheel at the bottom is 25.5 rad/s

Explanation:

The computation of the final angular speed of the wheel at the bottom is as follows:

As we know that

[tex]W_f = W_{in} + \alpha t\\\\= 2.5 + (2 \times 11.5)\\\\= 2.5 + 23\\\\= 25.5 rad/s[/tex]

Hence, the final angular speed of the wheel at the bottom is 25.5 rad/s

We simply applied the above formula so that the final angular speed could come

Answer:

Wavelength, frequency and the photon energy changes as the one goes across the ranges of the electro-magnetic radiations.

Explanation:

Electro-magnetic radiations may be defined as the form of energy that is radiated or given by the electro-magnetic radiations. The visible light that we can see is the one of the electro-magnetic radiations. Other forms are the radio waves, gamma waves, UV rays, infrared radiations, etc.

The wavelength of the radiations decreases as we go from a. radio waves -- b. infrared radiation -- c. visible light -- d. ultraviolet radiation -- e. gamma radiation.

The frequency of the radiations increases when we move from a. radio waves -- b. infrared radiation -- c. visible light -- d. ultraviolet radiation -- e. gamma radiation.

The photon energy of the radiations increases when we move from a. radio waves -- b. infrared radiation -- c. visible light -- d. ultraviolet radiation -- e. gamma radiation.

Answer:

D. 20J

Explanation:

Answer:

Explanation:

yes

Answer:

I know this isn't much help but its not B

Explanation:

Answer:

D

Explanation:

Answer:

44.3 m/s

Explanation:

Given that a ball is thrown horizontally from the top of a building 100m high. The ball strikes the ground at a point 120 m horizontally away from and below the point of release.

What is the magnitude of its velocity just before it strikes the ground ?

The parameters given are:

Height H = 100m

Since the ball is thrown from a top of a building, initial velocity U = 0

Let g = 9.8m/s^2

Using third equation of motion

V^2 = U^2 + 2gH

Substitute all the parameters into the formula

V^2 = 2 × 9.8 × 100

V^2 = 200 × 9.8

V^2 = 1960

V = 44.27 m/s

Therefore, the magnitude of its velocity just before it strikes the ground is 44.3 m/s approximately

Answer:

The objects must have moments with the same magnitude but opposite directions.

Explanation:

The condition alone that is necessary in order to make the final kinetic energy of the system to be zero after the collision is that the objects must have moments that are the same in magnitude but have opposite directions.