QUESTION If the angular acceleration were doubled for the same duration, by what factor would the angular displacement change

Answer:

What is the acceleration a of the refrigerator 4 s after the person begins pushing on it with a force of 400 N? a=2m/s^2 Applying Newton's 2nd law, a=Fnet/m=(400N)/(200kg)=2m/s^2. The acceleration is constant.

Explanation:

The person begins to push a refrigerator with a force of 400 N. So, the acceleration of the refrigerator will be 2 m/s².

In mechanics, acceleration is the measure of how rapidly an object's velocity changes over time. It is a vector quantity. An object's acceleration depends on the direction of the net force exerted on it.

A vector quantity, acceleration is something that has both a magnitude and a direction. As a vector quantity, velocity is also. The ratio of the velocity vector change over a time interval to that interval is the definition of acceleration.

There are several types of acceleration :

According to the question, the given values are :

Force applied to the refrigerator is 400 N.

The mass of the refrigerator is 200 kg.

Use the 2nd law of newton,

[tex]Force= mass*acceleration[/tex]

Acceleration = 400/200

Acceleration = 2 m/s².

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Answer:

363

Explanation:

80g of kerosene was burned to raise the temperature

k = 90+273

= 363

Answer:

i want the answer

Explanation:i want the answer

a. The power consumed by this appliance is 931.7W

b. The electrical energy is consumed by this food processor monthly (30 days) if it is used on average of 10.0 min every day is 4.65kWh

c. The  monthly cost of using this food processor is 32.55 $

The rate of consumption of energy is power. it is given by the product of potential difference(V) and current(I)

a. P = VI  

here V  = 110V . I = 8.47 A

P = 110 x 8.47 = 931.7W

hence power consumed is 931.7 W

b. electrical energy  consumed by this food processor monthly (30 days) if it is used on average of 10.0 min every day is

E = P/t

Here, P = 931.7 W = 0.93kW

t = 10 x 30 = 300 min = 5 h

So, E =0.93 x 5 =  4.65 kWh

hence electrical energy consumed is 4.65kWh

c. The monthly cost of using the food processor is

given ,

Cost of one unit is 7.00$

Cost of 4.65 unit will be  7.0 x 4.65 =  32.55$

monthly cost of using the food processor  is  32.55$

2.

a.  Power consumption of refrigerator is  416 W

P = E/t  

Here, E = 70 kwh . t = 1 week = 168 h

So, P=  70/168 = 0.416 kW = 416 W

b. Current drawn by the refrigerator  is 3.46A

P = VI

Here, V = 120V, P = 416 W

So, I = P/V = 416/120 = 3.46 A

3.

a. The resistance of the element is 5.14 Ω

b. Current drawn by the boiler is 23,33A

Resistance is the hindrance caused in the flow of current

a. The resistance is given by [tex]R = v^{2} / P[/tex]

here V = 120V , P = 2.8kW = 2800W

R = (120 x 120)/ 2800 = 5.14Ω

Hence Resistance of the boiler is 51.4Ω

b.   V = IR so, I = V /R

Here, V = 120V , R = 5.14Ω

So, I = 120/51.4 = 23.33 A

Hence current drawn by the boiler is 23.33A

The alternate way to find the current is by using formula

P = VI  

I = P/V

Since, P = 2800W,   V = 120V

So, I = 2800/120 =23.33 A

Hence Current comes out to be the same from both the method which verifies the answer .

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Answer: Solid to a Liquid Liquid to a Solid Liquid to a Gas Gas to a Liquid Solid to a Gas Gas to a Solid

Explanation:

Answer:

one time i was one the flat ground at my aunts house then we went on a hike so i brought my bike it had just rained that day so it was kinda muddy so there was sticks everywhere.i was riding up hill and noticed that it was very hard,then i rode down hill and it was much better

Explanation:

Answer:

1: 51 m

2: some energy was transformed to other forms

3: 3.24

4: 45j

5: 1020

Explanation:

The required height of hill is 51 m. Hence, option (C) is correct.

Given data:

The mass of person is, m = 80 kg.

The energy expended during climbing is, E = 40,000 J.

The energy possessed by the body by virtue of height is known as potential energy. In the given case, the energy expended by the person will be stored in the form of potential energy. Then,

E = U

E = mgh

here, h is the height of hill and g is the gravitational acceleration.

Solving as,

40000 = 80(9.8) h

h ≈ 51 m

Thus, we can conclude that the required height of hill is 51 m. Hence, option (C) is correct.

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Answer:

Frequency and period are distinctly different, yet related, quantities. Frequency refers to how often something happens. Period refers to the time it takes something to happen. Frequency is a rate quantity.

Answer:

Frequency and period are distinctly different, yet related, quantities. Frequency refers to how often something happens. Period refers to the time it takes something to happen. Frequency is a rate quantity.

Explanation:

Answer:

The required diagram is shown in the figure. When an object is placed in front of the convex lens, i.e., between 2F

1

and F

1

, its image is formed beyond 2F

2

on the other side of the lens. The image is real, inverted and enlarged.

solution

Answer: ok

Explanation: ok

Answer: Balanced

Explanation: When a bird is perched on a tree it is sitting still will stay still if the forces acting on it are balanced.

Answer:

a = 2.94 m/s²

Explanation:

In order for the cup not to slip, the unbalanced force on cup must be equal to the frictional force:

Unbalanced Force = Frictional Force

ma = μR = μW

ma = μmg

a = μg

where,

a = maximum acceleration for the cup not to slip = ?

μ = coefficient of static friction = 0.3

g = acceleration due to gravity = 9.8 m/s²

Therefore,

a = (0.3)(9.8 m/s²)

a = 2.94 m/s²

Answer:

125 m

Explanation:

m = 3kg

v = 50m/s

u = 0m/s

a = +g = 10m/s²

s = H = ?

using the formula,

v² = u² + 2as

50² = 0² + 2(10)(H)

2500 = 20H

H = 2500/20

H = 125m

Answer:

The energy stored in the solenoid is 7.078 x 10⁻⁵ J

Explanation:

Given;

diameter of the solenoid, d = 2.80 cm

radius of the solenoid, r = d/2 = 1.4 cm

length of the solenoid, L = 14 cm = 0.14 m

number of turns, N = 200 turns

current in the solenoid, I = 0.8 A

The cross sectional area of the solenoid is given as;

[tex]A = \pi r^2\\\\A = \pi (0.014)^2\\\\A = 6.16*10^{-4} \ m^2[/tex]

The inductance of the solenoid is given by;

[tex]L = \frac{\mu_0 N^2A}{l} \\\\L = \frac{(4\pi*10^{-7})(200^2)(6.16*10^{-4})}{0.14}\\\\L = 2.212*10^{-4} \ H[/tex]

The energy stored in the solenoid is given by;

E = ¹/₂LI²

E = ¹/₂(2.212 x 10⁻⁴)(0.8)²

E = 7.078 x 10⁻⁵ J

Therefore, the energy stored in the solenoid is 7.078 x 10⁻⁵ J

The energy stored in a 2.80-cm-diameter, 14.0-cm-long solenoid that has 200 turns of wire and carries a current of 0.800 A is 7.07 × 10⁻⁵ J.

A solenoid is a type of electromagnet, whose purpose is to generate a controlled magnetic field through a coil wound into a tightly packed helix.

First, given the diameter of the solenoid (d) is 2.80 cm (0.0280 m), we can calculate the cross-sectional area (A) using the following expression.

[tex]A =\pi \times (\frac{d}{2} )^{2} = \pi \times (\frac{0.0280}{2} )^{2} = 6.16 \times 10^{-4} m^{2}[/tex]

Next, we will calculate the inductance (L) of the solenoid using the following expression.

[tex]L = \frac{\mu _0 \times N^{2} \times A}{l} = \frac{(4\pi \times 10^{-7}H/m ) \times 200^{2} \times (6.16 \times 10^{-4}m^{2} )}{0.140m} = 2.21 \times 10^{-4} H[/tex]

where,

Finally, for a current (I) of 0.800 A, we can calculate the energy stored (E) using the following expression.

[tex]E = \frac{1}{2} \times L \times I^{2} = \frac{1}{2} \times (2.21 \times 10^{-4}H ) \times (0.800A)^{2} = 7.07 \times 10^{-5} J[/tex]

The energy stored in a 2.80-cm-diameter, 14.0-cm-long solenoid that has 200 turns of wire and carries a current of 0.800 A is 7.07 × 10⁻⁵ J.

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Answer:

0.08 m

Explanation:

Linear expansivity brass = 2 * 10^-5 C

Linear expansivity = change in length / (initial length * θ)

Change in length = 0.2cm = 0.002m

Initial length = 2m

2 * 10^-5 = 0.002 / (2 * θ)

(2 * 10^-5 * 2θ) = 0.002

4 * 10^-5θ = 0.002

θ = 0.002 / 4 * 10^-5

θ = 2 * 10^-3 / 4 * 10^-5

θ = 0.5 * 10^2

θ = 50°C

For a rod of original length 80m at the same temperature of 50°C

Linear expansivity = change in length / (initial length * θ)

Change in length = dL

2 * 10^-5 = dL / (80 * 50)

2 * 10^-5 * 80 * 50 = dL

160 * 10^-5 * 50 = dL

8000 * 10^-5 = dL

0.08 m = dL

Hence, change in length = 0.08m

Correct question is;

In an RC parallel circuit, Et = 480 V, R = 50kΩ, and XC = 47 kΩ. What is the reactive power?

Answer:

P_r = 4.9 VARs

Explanation:

We are given;

Total voltage: Et = 480 V

Resistance; R = 50kΩ = 50000 Ω

Capacitive reactance; XC = 47 kΩ = 47000 Ω

Formula for current across the capacitor is;

Et = I_c • XC

I_c = Et/XC

l_c = 480/47000

I_c = 0.01021 A

Formula for reactive power is;

P_r = (I_c)² × XC

P_r = 0.01021² × 47000

P_r = 4.9 VARs

Answer:

2.71 m

Explanation:

Force is the product of mass and acceleration

F=m*a

Work done is the product of force and distance

Work done=F*d

In this case;

F= 35 N

Work done = 95 J

95 =35 * d

95 /35 = d

2.71 m= d

Answer:

When one person applies force f1 = 60 N at one end, the other person applies f2 = 160 - 60 = 100 N. The torques about the center must balance. Thus the distances from the center d1 and d2 must be such that f1*d1 = f2*d2, or 60*1.5 = 100*d2, so d2=0.9. Thus f2 must be applied at a point 1.5 + 0.9 = 2.4 m from the end where f1 is applied.

Answer:

very small...

Explanation:

i guess... but i may be missing something. the question feels too straightforward

Answer:

F = 93.49 × 10^(-9) N

Explanation:

We are given;

Length of rectangle; a = 1.1 m

Width of rectangle; b = 0.9 m

Charge on rectangle; q = 2.3 × 10^(-9) C

Formula for force is;

F = kq²/r²

Where;

k is a constant = 8.99 x 10^(9) N.m²/C²

a) on the width side, we have;

F = [8.99 x 10^(9) × (2.3 × 10^(-9))²]/0.9²

F = 58.79 × 10^(-9) N

This is on the y-axis

b) on the length side, we have;

F = [8.99 x 10^(9) × (2.3 × 10^(-9))²]/1.1²

F = 39.3 × 10^(-9) N

This is on the x-axis

C) using pythagoras theorem, for the diagonal side, we have c² = a² + b².

Thus;

F = [8.99 x 10^(9) × (2.3 × 10^(-9))²]/(1.1² + 0.9²)

F = 23.54 × 10^(-9) N

Using trigonometric ratios, we can find the angle θ.

tan θ = b/a

tan θ = 0.9/1.1

tan θ = 0.8182

θ = tan^(-1) 0.8182

θ = 39.29°

Resolving along x and y axis, we have;

F_x = 23.54 × 10^(-9) × cos 39.29°

F_x = 18.22 × 10^(-9) N

F_y = 23.54 × 10^(-9) × sin 39.29°

F_y = 14.91 × 10^(-9) N

Resultant force will be;

F = √((Σf_x)² + (ΣF_y)²)

F = √[(18.22 × 10^(-9)) + (39.3 × 10^(-9))]² + [(14.91 × 10^(-9)) + (58.79 × 10^(-9))²]

F = √[(33.0855 × 10^(-16)) + (54.317 × 10^(-16))]

F = 93.49 × 10^(-9) N

Answer:

I found the experience tasking

Explanation:

I wouldn't say it was hard, neither was it easy. I'd rather go for something like it being tasking. It's worthy of note that it was my first time, and I think it's very normal especially when one hasn't been doing something of that nature previously. Of course I did my draft, which unsurprisingly happened to be not good enough, and I had to look for templates to guide me through the acceptable way.

I still did it in my own way, but in the right way. Ever since then though, I have never stuttered when writing application letters, as it had since then seem inborn

The experience of writing a bio-data or an application letter was quite a tasking goal, where proper structure is required.

The given problem is based on the fundamentals of bio-data. Biodata is a document that is used to display the biographical data about the work experience in any organization.

Thus, it is concluded that writing a bio-data or an application letter was quite a tasking goal, where proper structure is required.

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Answer:

10

Explanation:

Given that :

Angular speed (w) = 62.8 rad/s

Radius of tire (r) = 30 cm

Number of revolutions per second :

s = 2πr

s = 2π * 0.3 = 1.8849555

The number or revolutions per second :

θ = s / r

θ = 1.884955 / 0.3

θ = 6.283185 rad

Number of revolutions per second :

62.8 / 6.283185

= 9.9949309

= 10

Answer:

false

Explanation:

sound travels slower than light. that is why we see lightning before we hear the thunder

Answer Expert Verified

Hello here is your answer and also please mark me as brainlest

Since one revolution around a circle is 2 pi radian; hence 1 rpm equals 2 pi radians per minute. And because a minute has 60 seconds, 1 rpm equals 1/60 revolution per second. Therefore, we have 2 pie/60 * 15.3 = 0.2513 rps. The linear velocity v = wr where w is the angular velocity in rad/s and r is the distance. So we have 0.2513 * 10.0 = 2.513 rad/s The centripetal acceleration is given by a = w^2 r = (2.513)^2 * 10 = 63.15 rad/s2 The centripetal force F = mass * centripetal acc = 75 * 63.15 = 4736.25 N The torque = centripetal force * distance = 4736 * 63.15 = 299078.4 Nm Two forces acts on the astronaut. The normal force and acceleration due to gravity.

I hope this help you

brainlest

Rotational kinematics and Newton's second law allow to find the results for the astronaut's movement in the centrifuge are:

       a) The angular velocity is: w = 1.927 rad / s

       b) The linear velocity is: v = 23.1 m / s

       c) The centripetal acceleration is: a = 6.417 10³ m / s²

       d) The centripetal acceleration is: a = 6.548 10² g

       e) The centripetal force F = 5.49 10⁵ N

given parameters

To find

    a) angular velocity

    b) linear velocity

    c) centripetal acceleration

    d) acceleration in units of gravity (g)

    e) the centripetal force

The angular velocity is defined as the rotated angle in the unit of time.

         [tex]w = \frac{\Delta \theta}{t}[/tex]  

Angular and linear variables are related.

         v = w r

Where w is the angular velocity, θ  is the angle, t the time, v the lienal velocity and R the radius of the cetnrifuga

Let's answer the questions:

a) The angular velocity of the centrifuge and the astronaut are equal

         w = 1.927 rad / s

b) Linear velocity

         v = 1.927 12.0

         v = 23.1 m / s

c) Centripetal acceleration has the formula:

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

          a = [tex]\frac{23.1^2}{12.0}[/tex]  

          a = 6.417 10³ m / s²

d) The value of this eceleration as a function of gravity

          [tex]\frac{a}{g}[/tex]  = 6.417 10³ / 9.8

          [tex]\frac{a}{g}[/tex]  = 6.548 10²

          a = 6.548 10² g

e) The centripetal force

           F = ma

           F = 85.5 6.417 10³

           F = 5.49 10⁵ N

In conclusion, using rotational kinematics and Newton's second law we can find the results for the movement of the astronaut in the centrifuge are:

       a) The angular velocity is: w = 1.927 rad / s

       b) The linear velocity is: v = 23.1 m / s

       c) The centripetal acceleration is: a = 6.417 10³ m / s²

       d) The centripetal acceleration is: a = 6.548 10² g

       e) The centripetal force F = 5.49 10⁵ N

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Answer:

Because when you move a object the energy stored in moving objects. As the object moves faster, more energy is stored. Motion energy is the sum of potential and kinetic energy in an object that is used to do work.

Explanation:

answer it please

What is the Central Idea of "Shelter Dog Protects Owner with Epilepsy“

What is the author’s viewpoint?

Do you agree or disagree with that viewpoint?

Why? Explain your answer.

parpgraph 1-2

Answer:

Yes, the energy used to lift the book was stored in the book as potential energy. The book moved when it was let go.

Explanation:

This is what edmentum sample answer says so I hope this helps out!