135g of an unknown substance gains 9133 J of heat as it is heated from 25⁰C to 100⁰C. Using the chart below, determine the identity of the unknown substance.

Answer:

166.67 N

Explanation:

Applying Pascal's principle,

Presure in the smaller piston(P') = Pressure in the bigger piston(P)

But,

Pressure = Force/Area

Pressure in the smaller piston(P') = Force applied to the smaller piston(F')/Area of the smaller piston(A')

Pressure in the bigger piston(P) =  Force applied to the bigger piston(F)/Area of the bigger piston(A)

F'/A' = F/A.................. Equation 1

Make F the subject of the equation

F = F'A/A'.............. Equation 2

From the question,

Given: F' = 20 N, A = 120 cm², A' = 10 dm² = (10×100) = 1000 cm²

Substitute these values into equation 2

F = 20(1000)/120

F = 166.67 N

Answer:

Electric forces exist among stationary electric charges; both electric and magnetic forces exist among moving electric charges. The magnetic force between two moving charges may be described as the effect exerted upon either charge by a magnetic field created by the other.

Answer:

i think this could help you

Answer:

Younger by nanoseconds

Explanation:

Not entirely sure :O

Answer:

Since Force is Mass * Acceleration, the equation would be:

5kg * 2m^2 = 10N

(10N is less than 65N)

Therefore, it would not be enough force for the bag to break.

Answer:

distance

hope it helps

Explanation:

-

Answer:

Answer 43cm

Explenation:

if you divide it to 4 it will convert to 43 so answer is 43cm if this wrong im sorry but mine is perfect thankss :)

Answer:

The emf source acts as a charge pump, moving negative charges from the positive terminal to the negative terminal to maintain the potential difference. This increases the potential energy of the charges and, therefore, the electric potential of the charges.

Explanation:

MARK AS BRAINLEST!!

Answer:

Cuboid?

Explanation:

Answer:

A. it contains ultraviolet, visible, and infrared light

Answer:

It is divided into seven ranges of wavelengths

Explanation:

i took the test

Answer:

38 N, 40.0° below the horizontal

Explanation:

Force exerted by an object equals mass times acceleration of that object: F = m ⨉ a. To use this formula, you need to use SI units: Newtons for force, kilograms for mass, and meters per second squared for acceleration.

Answer:

896.5 m/s

Explanation:

Given that :

Length of metal bar, λ= 5 m

Velocity in air, v = 343 m/s

Change in air frequency : = λ / v

f = 5 / 343 = 0.0145772 s = 14.5772 ms

Seperation time = 9ms

Change in time, t = 14.5772 - 9 = 5.5772 ms

Recall :

Velocity = Distance / time

V = 5m / 5.5772 * 10^-3 s

V = 896.50720 m/s

Velocity = 896.5 m/s

Explanation:

f=v/wavelength

=200/5

=40Hz

Answer:

At the centre

Explanation:

To prove the position of the centre of mass, usually we take a strip across the circular disc and call it dy; calculate the length of the strip; calculate the mass per unit area of the disc. And then when we carry out some integral operations using R and -R as the boundaries we will arrive at y_cm = 0 which means the centre y_cm is at the centre of mass of this uniform disc.

violet

it has the shortest wavelength

Answer:

the step that the student should change is step 7

Explanation:

The movement of the spring with block is a simple harmonic type movement, so the procedure proposed by the student is correct, but we must take some care.

Step 3 is important since each movement will be started with similar conditions, also if any displacement is very large we can get out of the linear approximation of Hooke's law, for which we need to know the equilibrium point, since from this point displacements will be measured.

Step 6 should be changed to measure various oscillations to find the average period and thus decrease the error in the time reading.

Step 7 is wrong since the objective of the experiment is to analyze the effect of different masses in the period of oscillation and this step prevents this objective from being carried out.

In conclusion, the step that the student should change is step 7

The step that should be revised to make the determination is c. Step 6, because the stopwatch should be used only to measure the time it takes for the system to make 1 complete oscillation.

The student is trying to find the effect of the mass of the block on the period of oscillation in different vertical displacements.

The best way to do this is to measure the time taken per oscillation as this would show a much clearer picture to find the effect of the mass on the oscillation. Timing 10 oscillations will yield incorrect results.

In conclusion, option C is correct.

Find out more on measuring the effect of mass on oscillation at https://brainly.com/question/14745507.

Answer:An object that absorbs ALL radiation falling on it, at all wavelengths, is called a blackbody. When a blackbody is at a uniform temperature, its emission has a characteristic frequency distribution that depends on the temperature. ... As its temperature increases further it becomes yellow, white, and ultimately blue-white

Explanation:

Answer:

Average :

UCL = 4.15

LCL = 2.65

Range :

UCL = 2.75

LCL = 0

Explanation:

Given :

Sample size, n = 5

Average, X = 3.4

Range, R = 1.3

A2 for n = 5 ; equals 0.577 ( X chart table)

For the average :

Upper Control Limit (UCL) :

X + A2*R

3.4 + 0.577(1.3) = 4.1501

Lower Control Limit (LCL) :

X - A2*R

3.4 - 0.577(1.3) = 2.6499

FOR the range :

Upper Control Limit (UCL) :

UCL = D4*R

D4 for n = 5 ; equals = 2.114

UCL = 2.114*1.3 = 2.7482

Lower Control Limit (LCL) :

LCL = D3*R

D3 for n = 5 ; equals = 0

LCL = 0 * 1.3 = 0

Answer:

None.

Explanation:

        causes an object to change its position, i.e. to have a displacement.

        Since the laptop cart is at rest while he stops at the water fountain, no  

       net work done is on the laptop cart.

Answer:

blocks of ice are usually covered with cloth or sawdust while being stored

Dense because food do be dense tho

Answer:

Tissue: cardiac muscle

Organ: Heart

Organ System: Human Body, Circulatory System

Explanation:

The cardiac muscle makes up an organ, making it a tissue

The Heart makes up a organ system, making it an organ

Both the human Body and The Circulatory System make up an organism, making them organisms

Answer:

Condensation can also produce water droplets on the outside of soda cans or glasses of cold water. When warm air hits the cold surface, it reaches its dew point and condenses. This leaves droplets of water on the glass or can.

Explanation:

Answer:

15.64 V

Explanation:

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

Capacitor (C) = 3.33x10¯⁶ F

Energy (E) = 8.15×10¯⁴ J

Voltage (V) =?

The voltage across the capacitor can be obtained as follow:

E = ½CV²

8.15×10¯⁴ = 3.33x10¯⁶ × V²

Divide both side by 3.33x10¯⁶

V² = 8.15×10¯⁴ / 3.33x10¯⁶

Take the square root of both side

V = √(8.15×10¯⁴ / 3.33x10¯⁶)

V = 15.64 V

Thus, the voltage across the capacitor is 15.64 V

Answer:

22.12

Explanation:

on accellus

Answer:

There is a transformation of mass into energy un nuclear fusion

Answer:

fusion

Explanation:

The nuclear reactions inside convert hydrogen into helium by means of a process known as fusion. It is this nuclear reaction that gives a star its energy. Fusion takes place when the nuclei of hydrogen atoms with one proton each fuse together to form helium atoms with two protons.

Answer:

otinni oSame lage ta dili pud ko ka comment sa live Ni madamstin

Answer:

it can be used to locate underwater objects

Answer:

0.43622 seconds

0.9158 foot

-4.43 ffot/sec

Explanation:

we first find the period of oscillation

= 2π√w/gk

= 2π√4000/32x2600

= 2π√0.00481

= 2π0.0694

= 0.43622

b. we find the angular velocity

2π/T

= 2π/0.43622

= 14.41 rad/sec

we find displacement

rom the calculation in the attachment

Ф = -144.1

initial condition

1*cos(-144.1 rad)

= 0.9158 foot

initial velocity of the car

= (-1)(14.41)sin(ω(0)-144.1)

= -4.44 foot/sec