What is the value of the angle of inclination of the slide?​

Answer:

A

Explanation:

the answer would be basicly A

Answer:

0.143 m

Explanation:

Since

d = 1/N = 1/520 = 1.92 * 10^-3 mm

For red light;

θ = sin^-1  (1 * λred/d) =  sin^-1  (1 * 656 * 10^-9/1.92 * 10^-6) = 19.98°

L = 1.4 * (tan 19.98) = 0.509 m

For blue light;

θ = sin^-1  (1 * λblue/d) =  sin^-1  (1 * 486 * 10^-9/1.92 * 10^-6) = 14.66°

L = 1.4 * (tan 14.66°) = 0.366 m

Distance between the first-order red and blue fringes= 0.509 m - 0.366 m = 0.143 m

Answer:

22

Explanation:

before:

2m

What is the change in momentum if the v before = 1m/s and the velocity after = 1m/s?

(Change in momentum - momentum after-

after:

2m

momentum before) p - mv

Answer:

The energy is transferred to chemical and heat energy.

Explanation:

If you define "bouncing" as leaving the ground for any amount of time, the ball stops bouncing when the elastic energy stored in the compression phase of the bounce is not enough to overcome the weight of the ball. This is the proof of the answer i Hope this helps :)

Answer:

c. The roller coaster is in uniform circular motion

Explanation:

Since the loop is circular with radius r, and its instantaneous speed, v is always constant, and also, its centripetal acceleration, a' = v²/r.

Since the angular speed, ω = v/r does not change, the magnitude of its  tangential acceleration is zero although there is a change in its direction because the direction of its initial velocity changes. That is a" = rα and α = Δω/Δt since Δω = 0, α = 0 and a" = r(0) = 0

So, there is no tangential acceleration. Since there is no tangential acceleration, our instantaneous acceleration which is the vector sum of our centripetal acceleration and tangential acceleration is a = √(a'² + a"²) =  √(a'² + 0²) = √a'² = a' = v²/r

So, a is always v²/r.

Since the instantaneous acceleration is always (a = v²/r) constant, the motion is uniform. So, it is uniform circular motion.

The roller coaster is not in uniform circular motion, and [tex]a = \frac{v^2}{r}[/tex] is only applicable at the very top and bottom of the loop where the tangential acceleration vanishes.

The given parameters;

The motion tension on the loop at the lowest point in the circular motion is given as;

[tex]T = mg + \frac{mv^2}{r}[/tex]

The motion tension on the loop at the highest point in the circular motion is given as;

[tex]T = \frac{mv^2}{r} - mg[/tex]

This shows that circular motion is affected by;

Thus, we can that the roller coaster is not in uniform circular motion, and [tex]a = \frac{v^2}{r}[/tex] is only applicable at the very top and bottom of the loop where the tangential acceleration vanishes.

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Answer:

Explanation:

.....

Answer:

Explanation:

Average velocity = Total displacement / total time

Average speed = total distance covered / total time

a )

For the entire trip from your front door to the bench

Total displacement = 55 - 35 = 20 m  [ first displacement is positive and second displacement is negative , because second displacement is in opposite direction ]

Total displacement = 20 m

Total time = 30 + 36 = 66 s

Average velocity = 20 / 66

= .303 m / s

b )

For the entire trip from your front door to the bench

Total distance covered  = 55 + 35 = 90  m

Total time = 30 + 36 = 66 s

Average speed  = 90 / 66

= 1.36  m / s

Answer:

a. Electric field strength is 1.6*10^6 V/m = 1.6 Megavolt/meter

b. speed of an electron is 5.2*10^14m/s

Explanation:

The electric field strength is given by:

E = ΔV/d

E = electric field strength,

ΔV = potential difference,

d = plate spacin

ΔV = 21×10^3V, d = 1.3×10^-2m

a) E = V / d = (21*10^3)/(1.3×10^-2) = 1.6*10^6 V/m = 1.6 Megavolt/meter

b) Exit energy = V . e

Where 'e' is the charge of electron (1.6 * 10^(-19)

Exit energy = (21*10^3)*(1.6*10^-19) = 3.36*10−15

From the above, speed v = √2*Exit Energy/mass

Where 'm' is the mass of electron (9.1 * 10^(-31)

v = √2*energy/mass

v = √2*(3.36*10^-15)/(9.1*10^-31) = 5.2*10^14m/s

Answer:

Magnitude of it's displacement = 1,000 km

Explanation:

Given:

Distance towards east = 800 km

Distance towards north = 600 km

Find:

Magnitude of it's displacement

Computation:

Magnitude of it's displacement = √800² + 600²

Magnitude of it's displacement = √640000 + 360000

Magnitude of it's displacement = √10000000

Magnitude of it's displacement = 1,000 km

Answer:

5 units to the left

Explanation:

I had the same question :)

Answer:

6.3N

Explanation:

Guessed it right on castle learning

Answer:

6.3 N

Explanation:

F=kx

F=(25N/m)(0.25m)

6.3 N

Answer:

The answer is False......

Answer:

true

it is equal but opposite

Answer:

7m/s

Explanation:

Using the equation of motion;

v = u+at

u = 0m/s

t = 3.5secs

a = 2m/s^2

Get the required velocity

v = 0 + 2(3.5)

v = 2(3.5)

v = 7.0m/s

Hence the body is moving with a speed of 7m/s

Answer:

Newton's law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them. Objects with greater mass have a stronger force of gravity between them.

The gravitational force depends upon two variables the mass of the objects and the distance between them.

In the universe, each body attracts another body towards itself is called Gravitational Force. Thus, gravitation is the study of the interaction forces between two masses.

Newton’s law of gravitation can be defined as every system of matter in the universe attracts every other system with a definite force. The magnitude of this force has a direct relationship with the masses of the systems.

[tex]F \propto M_1M_2[/tex]

The magnitude of this force has an inverse relation with the square of the distance.

[tex]F \propto 1/r^2[/tex]

Therefore, the gravitational attraction between two bodies can be represented as:

[tex]\displaystyle F = G\frac{ M_1M_2}{r^2}[/tex]

The mass of the physical system is directly proportional to the gravitational attraction therefore when the mass increases then the gravitational force will increase.

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Answer:

c

Explanation:

The statement that are true regarding nonmetals are that they can exist as solids, liquids, or gases, have a wide variety of properties, most of which are the opposite of metals. The correct options are a and b.

Non-metals are naturally occurring materials that do not generate heat or electricity and are structurally brittle.

Non-metallic elements in the periodic table include hydrogen, carbon, nitrogen, oxygen, phosphorus, arsenic, and selenium.

Metals make up the majority of the elements on the periodic table. Depending on how the artificially synthesized elements are classified, approximately 93 elements are metals. Only about 18 elements are considered nonmetals.

Because most metals have high melting points, they are solid at room temperature. At room temperature, most nonmetals have low melting points because they are not solid.

Nonmetals can exist as solids, liquids, or gases and have a wide range of properties, the majority of which are diametrically opposed to metals.

Thus, the correct options are a and b.

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Answer:

1500N

Explanation:

Normal force = mg - F sin theta

constant velocity means acceleration = 0

F= ma = 150× 0 = 0N

thus;

normal force = mg = 150 × 10 = 1500N

Answer:

864N

Explanation:

Answer:

Explanation:

Let us first calculate the velocity of rocket on reaching the height of 585 m

v² = u² + 2 a s

= 0 + 2 x 2.35 x 585

v = 52.43 m /s

For onward journey of rocket , initial velocity u = 52.43 m /s , acceleration = - g = - 9.8 m /s² final velocity at top point v = 0

v² = u² - 2gh

0 = 52.43² - 2 x 9.8 x h

h = 140.25 m

Total height reached

= 585 + 140.25

= 725.25 m

b )

Time to reach the top position be t₁

v = u - gt₁

0 = 52.43 - 9.8 t₁

t₁ = 5.35 s

Time to reach the ground after reaching highest point be t₂

h = ut + 1/2 g t²

u = 0 as at top point , velocity = 0

725.25 = 0 + .5 x 9.8 t₂²

t₂² = 148

t₂ = 12.16 s

Total time = t₁ + t₂

= 5.35 + 12.16

= 17.51 s .

Answer:

20 C

Explanation:

To do this, is pretty easy, we just need to do a little reasoning of what is happening.

When any charge  called q is placed inside this metallic shell which is spheric, all the opposite and even equal charges are induced on the inner and outer surface of the shell. Hence, we can say that if in the inner shell we have +q, in the outer will be -q.

Now, here we have the shell with 5 C, and when the charge of -11 C is placed inside the shell we can have the following changes on the inner surface and the outer surface:

Inner surface: +11 C

Outer surface: 9 + 11 = 20 C

Hope this helps

Answer:

If one of the parents is white and the other is brown, their offspring will be either white or brown with equal probabilities. Rabbits in this population mate randomly; thus, the probability of mating two white rabbits is the same as the probability of mating between two brown rabbits.

Explanation:

Answer:

Uniform area charge density rho is needed is 3.82*10^-8 C.m^-2

Explanation:

See the attached files.

To find the rho, I used Gauss law for cylindrical shell which is equation 1 and Gauss law for the rod which is equation 4.

Note that in equation 4, Lamda is the charge per length while L is the length if the rod. Also R is the radius of the shell.

The final answer is 3.82*10^-8 C.m^-2 which is the uniform area charge density rho is needed.

Answer:

the answer is C baseball and bowling ball

Answer:

Newton's second law says that when an unbalanced force is applied to a mass it causes it to accelerate

Explanation:

Answer:

30.4 s

Explanation:

A pilot , with plane accelerated at 4 g starts greying out . In the problem , the acceleration of jet is 4 g

a = 4 x 9.8 = 39.2 m /s²

initial velocity u = 0

Final velocity = 3.60 times speed of sound

= 3.6 x 331 = 1191.6 m /s

v = u + at

Putting the values

1191.6 = 0 + 39.2 t

t = 30.4 s .

Answer:

6 m/s

Explanation:

Recall that average velocity is the quantity final position minus initial position, divided by the time it took. So in our case, the cheetah after all the away and back and away again, the mother got a total of: 30 - 10 + 40 = 60 m

and the total time is: 2 + 3 + 1 + 4 = 10 second

Then the average velocity is: 60 m / 10 sec = 6 m/s

Answer:

a)     F = 2.3797 10⁴ N, b)     t = 1.97 10⁻⁴ s

Explanation:

a) For this exercise let's use the relationship between work and scientific energy

          W = ΔK

          W = F .d

          ΔK = ½ m v² - ½ m v₀²

the bold are vectors.  in this case the force of the bullet on the hand and the displacement of the bullet has the opposite direction, therefore the angle between the two is 180. The velocity when the bullet stops is zero.

We substitute

         -F x = - ½ m vo2

         F = [tex]\frac{m v_o^2}{2 x}[/tex]

let's calculate

         F = [tex]\frac{7.80 \ 10^{-3} 600^{2} }{2 \ 5.90 \ 10^{-2} }[/tex]

         F = 2.3797 10⁴ N

b) let's find the acceleration

         F = ma

         a = F / m

         a = 2.3797 10⁴ / 7.80 10⁻³

         a = 3.05 10⁶ m / s²

now we can use the kinematics relations

        v = v₀ - a t

the final velocity is zero v = 0

        t = v₀ / a

        t = 600 / 3.05 10⁶

        t = 1.97 10⁻⁴ s

Answer:

C) 90 degrees

Explanation:

If we could have an imaginative illustration about what the question is all about.

We could think of the velocity of the river (V_r cosθ) as a horizontal component and the velocity of the boat (V_b sinθ) as the vertical component.

So the velocity of the boat V_b = 2.2 m/s; &

the velocity of the river V_r = 1.1 m/s

∴

The minimum time (which is the shortest time) required for the boat to cross the river is θ = 90°

the time require is:

[tex]t = \dfrac{d}{v_b \ sin \theta}[/tex]

[tex]t = \dfrac{95}{2.2}[/tex]

t = 43.18 sec

Answer:

Heat energy required = 252000J or 252KJ.

Explanation:

Given the following data;

Mass = 3kg

Temperature = 20ºC

Specific heat capacity of water = 4200 J/kg°C

To find the heat energy required;

Heat capacity is given by the formula;

[tex] Q = mct [/tex]

Where;

Substituting into the equation, we have;

[tex] Q = 3*4200*20 [/tex]

Q = 252000 Joules or 252 Kilojoules.

Answer:

It is a measure of the electric force per unit charge on a test charge.

Explanation:

The magnitude of the electric field is defined as the force per charge on the test charge.

Since we define electric field as the force per charge, it will have the units of  force divided by the unit of charge. This implies that the SI unit of electric field is given as Newton/Coulomb (N/C).

Because from the definition of the electric field intensity, it can be defined as force per unit charge. The correct answer is option D

Electric field is the region of space where electric force can be felt. It can also be expressed as electric field intensity E. Mathematically, it can be expressed as;

E = F/q or E = V/d

From the question, the statements that is true concerning the magnitude of the electric field at a point in space is " It is a measure of the electric force per unit charge on a test charge "

Because from the definition of the electric field intensity, is can be defined as force per unit charge.

Therefore, option D is the right answer.

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