what volume of alcohol will have the same mass as 4.2m^3 of petrol? (density of alcohol 0.4kg/m^3 and petrol is 0.3kg/m^3)​

Answer:

The student squeezed the clothespin less the second time because the muscles in his hand began to fatigue

Explanation:

Answer:

Ver la explicación a continuación.

Explanation:

En física estas siglas significan movimiento rectilíneo uniforme, es decir es el tipo de movimiento donde la velocidad es constante. La velocidad no cambia con el tiempo.

Este tipo de movimiento se puede describir con la siguiente ecuación.

[tex]x=x_{0}+v*t[/tex]

Donde:

x = posición final [m]

xo = posición inicial [m]

v = velocidad [m/s]

t = tiempo [s]

When light is transmitted through an object things can happen. The light could be reflected by the thing. Or it could be absorbed by the object. Saying this based on what I know.

Answer:

[tex]1.5\:\mathrm{J}[/tex]

Explanation:

The elastic potential energy of a spring is given by the following:

[tex]PE_s=\frac{1}{2}k\Delta x^2[/tex], where [tex]k[/tex] is the spring constant and [tex]\Delta x[/tex] is displacement.

The displacement of the string is [tex]0.50-0.40=0.10\: \mathrm{m}[/tex].

Plugging in our given values, we get:

[tex]PE_s=\frac{1}{2}\cdot300\cdot0.10^2=\fbox{$1.5\:\mathrm{J}$}[/tex].

The elastic potential energy stored in the spring is 1.5 joule.

Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases.

If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy. It is capable of performing more work when raised. Potential energy is a characteristic of systems rather than of particular bodies or particles.

Spring constant of the spring : k = 300 N/m.

Initial length of the spring = 0.40 m

Final length of the spring = 0.50 m.

Hence, stretching  of the spring: Δx = 0.50 m - 0.40 m = 0.10 m.

So, the elastic potential energy stored in the spring is = 1/2 × k × Δx²

= 1/2 × 300 × (0.10)² joule

= 1.5 joule.

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Answer: The trip took 40 minutes average speed should be 1 mph

Explanation:  It takes aprox 12 mins to reach 20km and the trip took 40 mins. This is obviously above what it should be. Not sure if I'm 100% correct

Explanation:

Given

heat supplied (Q) = 1000 J

mass(m) = 100 g = 0.1 kg

specific heat capacity of water(s) = 4200 J/kg°C

change in Temperature (dt) = ?

We know we have the relation

Q = m * s * dt

Or, 1000 = 0.1 * 4200 * dt

Or, 1000 = 420 dt

Or, dt = 1000/ 420

Therefore dt = 2.38°

Hope it will help :)

The temperature changes when 1000J of heat is supplied to 100g of water is dt = 2.38°

The average kinetic energy of a system is measured by its temperature. The kinetic energy of a system starts to rise as the particle's velocity increases, which raises the system's temperature.

The energy that is transferred when two bodies with different surface temperatures come in touch is referred to as heat.

The change is when 1000J of heat is supplied to 100g of water.

Given that:

heat supplied (Q) = 1000 J

mass(m) = 100 g = 0.1 kg

specific heat capacity of water(s) = 4200 J/kg°C

Change in Temperature (dt) = ?

We know we have the relation

Q = m x s x dt

Or, 1000 = 0.1 x 4200 x dt

Or, 1000 = 420 dt

Or, dt = 1000/ 420

Therefore, the temperature changes when 1000J of heat is supplied to 100g of water is dt = 2.38°.

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The point B represent the crest of the wave. The crest is the peak of the wave. While the trough is the lowest.

The distance between two successive troughs or crests is known as the wavelength.

The wavelength is also defined as the distance between two locations in a wave that have the same oscillation phase.

The point B represent the crest of the wave. The crest is the peak of the wave. While the trough is the lowest.

Hence, option B is correct.

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Answer:

T try d add b CD c

Explanation:

Cdgffd

Answer:

[tex]\boxed {\boxed {\sf 12 \ Newtons }}[/tex]

Explanation:

Force is equal to the product of mass and acceleration.

[tex]F=m*a[/tex]

We know the mass, but not the acceleration. Therefore, we must calculate it before we can calculate force.

1. Calculate Acceleration

Acceleration is the change in velocity over the change in time.

[tex]a=\frac{V_f-V_i}{t}[/tex]

The final velocity is 10 meters per second and the initial velocity is 4 meters per second. The time is 1 second.

[tex]V_f=10 \ m/s \\V_i= 4 \ m/s \\t= 1 \ s[/tex]

Substitute the values into the formula.

[tex]a=\frac{10 \ m/s-4 \ m/s }{1 \ s}[/tex]

Solve the numerator.

[tex]a=\frac{6 \ m/s}{1 \ s }[/tex]

Divide.

[tex]a= 6 \ m/s/s=6 \ m/s^2[/tex]

2. Calculate Force

Now we know the acceleration and the mass.

[tex]m= 2 \ kg \\a= 6 \ m/s^2[/tex]

Substitute the values into the fore formula.

[tex]F= 2 \ kg * 6 \ m/s^2[/tex]

Multiply.

[tex]F= 12 \ kg*m/s^2[/tex]

[tex]F= 12 \ N[/tex]

The force applies to the ball was 12 Newtons.

Answer:

What happens to the density of an object if the object is cut in half? ... The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.

Explanation:

What happens to the density of an object if the object is cut in half? ... The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.

Answer:

20 Hz, 20000 Hz

0.0166 m, 16.6 m

Explanation:

The minimum frequency that a human ear can hear is 20 Hz

The maximum frequency that a human ear can hear is 20000 Hz.

v = Velocity of sound = 332 m/s

Wavelength is given by

[tex]\lambda=\dfrac{v}{f}\\\Rightarrow \lambda=\dfrac{332}{20}\\\Rightarrow \lambda=16.6\ \text{m}[/tex]

The longest wavelength that can be heard by the human ear is 16.6 m

[tex]\lambda=\dfrac{332}{20000}\\\Rightarrow \lambda=0.0166\ \text{m}[/tex]

The shortest wavelength that can be heard by the human ear is 0.0166 m.

Answer:

Zero

Explanation:

The resultant force acting on the ball would be zero.

Since only two forces were acting on the tennis ball and these forces negate and cancel each other in magnitude, the resultant effect on the tennis ball would be zero.

Assuming that one of the forces is 5N and acting from the positive side and the other force is also 5N but acting from the negative side.

Resultant = -5 + 5 = 0 N

The Doppler effect is the change of pitch heard when the source of the sound approaches and then moves away from a stationary person. So, the correct option is A.

The Doppler effect or Doppler shift is defined as the phenomenon observed when a source of waves is moving with respect to an observer. For example, an ambulance passing us with the sound of its siren is a common physiological demonstration of the Doppler effect.

The frequency increases when the listener and the source are approaching each other, while the frequency decreases when the listener and the source are moving away from each other. The Doppler effect is the change of pitch heard when the source of the sound approaches and then moves away from a stationary person.

Therefore, the correct option is A.

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Answer:

if

Explanation:

weight is the force of gravity on a mass; the force of gravity is

F = G M m/r^2

F is grav force

G is the newtonian gravitational constant = 6.67 x 10^-11 Nm^2/kg^2

M=mass of the earth

m=mass of the object

r= radius of the earth

if the mass of the earth increases by a factor of 6, this will tend to increase the grav force by a factor of 6

if the radius increases by a factor of 5, this will change the grav force by a factor of 1/5^2 = 1/25

the total effect is 6/25 = 0.24; therefore, your weight would be 0.24 * 620N = 149N

From the principle of the conservation of energy, the velocity of the moving skater would be transferred to the stationary skater.

We know that according to the principle of the conservation of energy, energy can neither be created nor destroyed but we can be able to convert the energy from one form to the other. Given the fact that the energy of the object can be converted, we can also look at the collision as being an inelastic Collison.

Let us recall that a collsion is said to be in elastic if the momemtum and thge kinetic energy of the colliding particles is not conserved. The simple implication of this is that the objects would stick together and then move at a common velocity after the collision must have taken place in the system.

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Answer:

The option which is not a criteria for a celestial object to be a planet is;

The object must be massive enough have a gravitational pull on the Sun

Explanation:

There are three criteria for a celestial object to be classified as a planet including;

1) The object's orbit is around the Sun

2) The shape of the object is nearly round due to its mass which is capable of assuming hydrostatic equilibrium

3) Other smaller objects in the neighborhood around the object has been cleared by the object

Therefore, the option which is not a criteria for a celestial object to be a planet is that it must be massive enough to have a gravitational pull on the Sun as every two objects in the Universe share a common gravitational pull according to Newton's Law of Gravitation.

Answer:

what's the question?........

Answer:

Objects; waves.

Explanation:

Waves interact with objects and other waves. Thus, waves are used on objects such as mobile phones and can be transformed from one form to another.

There are various types of waves in our physical environment such as gamma rays, x-rays, ultraviolet waves, radio waves etc.

Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.

Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data. Some examples of communication technologies that uses radio waves are radio set, mobile phones, television etc.

Answer:

The Answer is A 9.80860 m/s²

Explanation:

The correctly lists the three features shown in the photo is folds, strike-slip faults, and anticlines.

Modern folds are those that emerged recently (on the scale of geological periods), that is, in the Tertiary Period (between 65 million and 2.5 million years ago). Faults are geological structures that originate from vertical (top-down) or inclined internal forces.

The transcurrent fault – also called horizontal fault – occurs when there is displacement in the horizontal plane between the two blocks, being more common in zones where two tectonic plates meet, when these also move horizontally.

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Answer: folds, strike-slip faults, and anticlines. (A)

Explanation: Got it right on my exam on Edge.

Answer:

Because both monomers and polymers and cross linked polymers are mers with physically properties which is good for applycations

Explanation:

because they are good for using and not using

also, this is a 5 point question, you are not  fooling anyone. thx for 5 points tho

Answer:

Inside a femur bone found in the woods,

saliva of gum

Answer:

930 centimeters

Explanation:

Answer:

5.28 x 10⁻⁹N

Explanation:

Given parameters:

Mass of alien  = 71kg

Distance  = 670m

Mass of ship  = 500000kg

Unknown:

Gravitational attraction  = ?

Solution:

The gravitational attraction can be found using the Universal gravitation law proposed by Newton;

      Fg  = [tex]\frac{G x mass 1 x mass 2}{d^{2} }[/tex]  

G is the universal gravitation constant  = 6.67 x 10⁻¹¹

 d is the distance

 Fg is the gravitational attraction

  Fg  = [tex]\frac{6.67 x 10^{-11} x 71 x 500000 }{670^{2} }[/tex]   = 5.28 x 10⁻⁹N

Answer:

The planets spun in epicycles.

Explanation:

The planets were not simply attached to a mystical sphere (“deferent”) but they were actually attached to a mini-sphere (“epicycle”) which rotated on the larger one.

Answer:A

Explanation: