A 120-kg roller coaster cart is being tested on a new track, and a crash-test dummy
is loaded into it. The roller coaster starts from rest at point A which is 25 m above
point B. If the track near to point B is in the shape of a circle with a radius of 15 m,
and the cart is moving at 22 m/s at point B, what centripetal acceleration does the
cart experience at that point?

Answer:

C

Explanation:

Since the circuit is in parallel there will be no effect on the other loads.

Answer:

98N

Explanation:

Given parameters:

Mass of the bowling ball  = 10kg

Mass of the softball  = 1kg

Unknown:

Force of gravity on the bowling ball  = ?

Solution:

The force of gravity on an object is the same as the weight of the body;

 Weight  = m x g

m is the mass

g is the acceleration due to gravity  = 9.8m/s²

 Weight of bowling ball  = 10kg x 9.8m/s²  = 98N

Answer:

La aceleración del automovil antes de deternerse es -5.5 m/s².

Explanation:

Podemos encontar la aceleración del auto usando la siguiente ecuación:

[tex] v_{f} = v_{0} + at [/tex]

En donde:

[tex]v_{f}[/tex]: es la velocidad final = 0 (se detiene)

[tex]v_{f}[/tex]: es la velocidad inicial

a: es la aceleración=?

t: es el tiempo = 4.0 s

Primero debemos encontrar la velocidad inicial, para ellos usaremos la siguiente ecuación de moviemiento rectilíneo uniforme:

[tex] v_{0} = \frac{x}{t} = \frac{110 m}{5.0 s} = 22 m/s [/tex]

Ahora, la aceleración es:

[tex] a = \frac{v_{f} - v_{0}}{t} = \frac{0 - 22 m/s}{4.0 s} = -5.5 m/s^{2} [/tex]

El signo negativo se debe a que el auto está desacelerando.

Entonces, la aceleración del automovil antes de deternerse es -5.5 m/s².

Espero que te sea de utilidad!                          

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass

From the question we have

[tex]a = \frac{10}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

a large matters of body with no shape is mass

Answer:

solar eclipse

Explanation:

because at that time, the moon completely covers the path and casts its shadow on earth because it is present between sun and earth's path. so, solar eclipse occurs.

hope it helps :)

Answer:solar eclipse

Explanation:

Top one is right <3

Given :

Reem took a wire of length 10 cm. Her friend Nain took a wire of 5 cm of the same material and thickness both of them connected with wires as shown in the circuit given in figure. The current flowing in both the circuits is the same.

To Find :

Will the heat produced in both the cases be equal.

Solution :

Heat released is given by :

H = i²Rt

Here, R is resistance and is given by :

[tex]R = \dfrac{\rho L}{A}[/tex]

So,

[tex]H = i^2\times \dfrac{\rho L}{A} t\\\\H = \dfrac{i^2\rho Lt}{A}[/tex]

Now, in the question every thing is constant except for the length of the wire and from above equation heat is directly proportional to the length of the wire.

So, heat produced by Reem's wire is more than Nain one.

Hence, this is the required solution.

Answer:

0.1m

Explanation:

Given parameters:

Frequency  = 12hz

Speed  = 1.2m/s

Unknown:

Wavelength of the wave  = ?

Solution:

The wavelength of the wave can be derived using the expression below;

      V  = f∧

V is the speed of the wave

f is the frequency of the wave

∧ is the wavelength

 So;

         ∧  = [tex]\frac{Velocity}{frequency}[/tex]

Now, insert the parameters and solve;

       ∧   = [tex]\frac{1.2}{12}[/tex]   = 0.1m

Answer:

E to F

Explanation:

The velocity decreases during segment E to F since the slope of the curve decreases with time.

We have 5 segments in the given graph between position and time. Analyzing each segment we can conclude the following:

Segment A to B: the position remains constant as time increases, this means that the velocity is zero.

Segment B to C: the rate of increase in the position slowly becomes greater as time passes, which means velocity is increasing and the object is accelerating

Segment C to D: The rate of increase in the position is constant with respect to the rate of increase in time, the slope of the curve is constant, which means that the velocity is constant.

Segment D to E: same as the segment A to B, the velocity is zero.

Segment E to F: The rate of increase in the position slowly decreases with time, and the slope of the curve decreases with time, which means the velocity is decreasing.

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Answer:

7167.27N/m

Explanation:

To get the force constant k, we will use the formula;

F = kx where

F is the force acting on the object down the plane

k is the spring constant

x is the extension

The force acting down the ramp us F = Wsintheta. The formula will become;

Wsintheta = kx

mgsintheta = kx

K = mgsintheta/x

K = (800)(9.8)sin47°/0.8

K= 7840sin47°/0.8

K = 5733.81/0.8

K = 7167.27N/m

Hence the spring constant of the spring is 7167.27N/m

Heya!!

For calculate wavelength, lets applicate formula:

                                                      [tex]\boxed{\lambda = V/f}[/tex]

                                                   Δ   Being   Δ

                                             f = Frequency = 5 Hz

                                            v = Velocity = 25 m/s

                                             [tex]\lambda[/tex] = Wavelenght = ?

⇒ Let's replace according the formula:

[tex]\boxed{\lambda = 25\ m/s / 5\ Hz }[/tex]

⇒ Resolving

[tex]\boxed{\lambda = 5\ m}[/tex]

Result:

The wavelength is 5 meters.

Good Luck!!

The wavelength of the wave is 5 meters.

Given the following data:

To find the wavelength of the wave:

Mathematically, the wavelength of a waveform is calculated by using the formula;

[tex]Wavelength = \frac{Speed}{Frequency}[/tex]

Substituting the given parameters into the formula, we have;

[tex]Wavelength = \frac{25}{5}[/tex]

Wavelength = 5 meters.

Therefore, the wavelength of the wave is 5 meters.

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Answer:

If im right the answer should be D

Answer:

As the temperature increases, the volume of the material also increases. This is known as thermal expansion. It can also be explained as the fractional change in the length or volume per unit change in the temperature.

The relation between alpha, beta, and gamma is given in the form of a ratio and the ratio is 1:2:3 and can be expressed as:

alpha=fracbeta2=fracgamma3

Following is the relation between the three:

L = L (1 + α.ΔT)

Where, α is the coefficient of linear expansion  

A = A (1 + β.ΔT)

Where, β is the coefficient of aerial expansion

V = V (1 + γ.ΔT)

Where, γ is the coefficient of cubical expansion  

V = V + γV.ΔT

V = V (1 + γ.ΔT)  

L3 = L3 (1 + α.ΔT)3

L3 = L3 (1 + 3α.ΔT + 3α2.ΔT2 + α3.ΔT3)

L3 = L3 (1 + 3α.ΔT)

Alpha, beta, and gamma are related to one another in the form of a ratio, and that ratio is 1:2:3, and yes they are universal constants.

A substance's volume expands while its mass stays constant. Heating is typically the cause of expansion. When a substance is heated, the molecular bonds separating its particles weaken, the particles move more quickly, and the substance expands as a result.

Determine the relation as shown below,

L = L (1 + α × Δ T)

here, α is the coefficient of linear expansion  

A = A (1 + β × Δ T)

here, β is the coefficient of aerial expansion

V = V (1 + γ × Δ T)

here, γ is the coefficient of cubical expansion  

V = V + γ × V × Δ T

V = V (1 + γ × ΔT)  

L3 = L3 (1 + α × Δ T)3

L3 = L3 (1 + 3α × ΔT + 3α2 × ΔT2 + α3 × ΔT3)

L3 = L3 (1 + 3α × Δ T)

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Answer:

Some of the disadvantages are: The normal design of a belt conveyor is opened. If your product needs to be contained, covers and or drip pans can become expensive and cumbersome. If the material is sticky, belt cleaning can be difficult and generally not very successful.

Explanation:

Answer:

Average current produced by the repeated transfer of charge is 5.6 × 10⁻⁷ ampere

Explanation:

The formula to be used here is

Q = It

where Q is the quantity of electricity and it is measured coulombs (C); 2.8 × 10⁻⁸ C or 0.000000028 C

I is current and it is measured in ampere (amps or A); unknown

t is time and it is measured in seconds (s); 0.05 s

Since, average current is what is unknown

I =Q/t

I = 0.000000028/0.05

I = 5.6 × 10⁻⁷ A

Average current produced by the repeated transfer of charge is 5.6 × 10⁻⁷ ampere

Answer:

Workdone = 1250Nm

Explanation:

Given the following data;

Force, F = 500N

Distance, d = 2.5m

Workdone is given by the formula;

[tex] Workdone = force * distance[/tex]

Substituting into the equation, we have

[tex] Workdone = 500 * 2.5 [/tex]  

Workdone = 1250Nm

Therefore, the actual work done by the worker is 1250 Newton-meter.

The actual work done by the worker is 1250 J.

Work can be defined as the product of force and distance. The s.i unit of work is Joules

The formula of work is

W = Fd....................... Equation 1

Where W = work done by the worker, F = Force, d = distance.

From the question,

Given: F = 500 N, d =  2.5 m

Substitute these values into equation 1

W = 500×2.5

W = 1250 J

Hence, the actual work done by the worker is 1250 J

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Answer:

Explanation:

Na₂CO₃ + CH₃COOH = CH₃COONa + CO₂ + H₂O .

1 mole        1 mole

mol weight of sodium carbonate = 106

mol weight of acetic acid = 60

5 g of sodium carbonate = 5 / 106 = .047 moles

10 g of acetic acid = 10 / 60 = .167 moles

sodium carbonate is the limiting reagent

.047 moles will react with .047 moles of acetic acid to give products .

grams of acetic acid reacted = .047 x 60 = 2.82 gram

grams of sodium carbonate reacted = 5 grams .

The particles in the gas are farther apart from each other, therefore illustration (C) represents the arrangement of particles in a gas.

Matter exists in different forms in nature in which three common states are solid, liquid, and gaseous. Some substances have a definite shape and some can flow, and take the shape of their container like water, some forms of matter do not have certain shapes or sizes.

The particles in solids are highly closely packed so illustration (D) represents the particles in a solid state. The compact packing of solids means that the particles are very close to each other and do not show movement.

In liquids, the particles are some distance away from each other and they show some movements. The particles in a liquid have some kinetic energy.

In gases, the particles are farther from each other and thus their particles show large movement. The kinetic energy of particles in gases is the greatest in comparison to that of solids and liquids.

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Answer:

The mass of the cars and people and the height of the track where the cars are located determine the potential energy in the system. Potential energy depends on an object’s mass and height and the gravitational pull on the object. A change in gravity would result in a change in potential energy. For example, if the track were located on the Moon instead of Earth, the potential energy would be different.

Explanation:

Answer:

b. a chair on a floor

Explanation:

All of the other objects are in motion, the jet is flying so it is not at rest, the rabbit is also moving, and a ball hit by a bat is also in motion

Answer:

m = FpCos0 / a

Explanation:

it just is

A box of mass m is pulled at an angle θ by a force Fp along a frictionless surface. The box travels to the right with acceleration a

What is the mass m of the box?

Answer: m = FpCos0/a

Answer:

Body Mass Index

Explanation:

Answer:

Free body diagram

Answer:

A. Rock cycle

Explanation:

Because it really is the change of a rock from another, like ingenuous, sedimentary rock..

It's D.

Weight always points downward.

The normal force always points perpendicular to the surface.

Friction opposes motion, so it points in the direction opposite the direction in which the block is moving.

Answer:

the magnet is not moving relative to the wire so B

Explanation:

The magnet is not moving relative to the wire if, A permanent magnet is placed in a coil of wire, If there is no electric current in the wire so, option B is correct.

Electric current is a term used to describe how much electricity flows across a circuit and how it flows in an electronic circuit. Amperes are used to measure it (A). The more electricity flowing across the circuit, the higher the ampere value.

When current flows through a coil of wire, it transforms into an electromagnet. The coil spins as a result of the electromagnet's interaction with a permanent magnet.

An electromagnet is created when current passes through a coil of wire. Because of the electromagnet's interaction with a permanent magnet, the coil spins.

Thus, The magnet is not moving relative to the wire.

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Answer:

D

Explanation:

The water vapor rises in the air.  It starts to expand while cooling the higher it gets in the atmosphere. This causes condensation.

Clouds are forming along the front because the rising air is expanding and cooling, causing condensation (Option D).

In conclusion, clouds are forming along the front because the rising air is expanding and cooling, causing condensation (Option D).

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