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Answer:

this questions is capable of being answered by submitting law

Answer:

The Earth Rotates on its axis

Explanation:

Answer:

1, decrease

Explanation:

At higher altitudes, air pressure is lower. When atmospheric pressure is lower, such as at a higher altitude, it takes less energy to bring water to the boiling point. Less energy means less heat, which means water will boil at a lower temperature at a higher altitude.

Deposition is when a gaseous state changes to solid state by escaping liquid state. So I think it is 3. Liquid glass cools and hardens

Answer:

Deposition

Explanation:

I took the quiz

Deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.

The term phase change simply means a change from one state of matter to another. Phase changes are often accompanied by a loss or gain in energy depending on what process occurred.

The phase change deposition is accompanied by a loss in energy as the particles become less energetic hence the entry involving deposition is wrong.

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Given parameters:

Height = 44.8m

Time to drop  = 1.49s

Unknown:

Speed of drop = ?

Solution:

The is a speed problem.

Speed is one of the physical quantities. It is designated a scalar because it has magnitude but no directional orientation.

Speed is the distance divided by time.

In this problem distance is the same as the height of the drop.

  Mathematically;

            Speed  = [tex]\frac{distance}{time}[/tex]

So, input the parameters and solve;

           Speed  = [tex]\frac{44.8}{1.49}[/tex]   = 30.1m/s

The drop recorded a speed of 30.1m/s

Answer:

-54.9

Explanation:

Answer:

1.4m/s^2 is the acceleration

Explanation:

magnitude and direction were already given . Using F=ma , acceleration is found .

The magnitude and direction of the cart's acceleration are 1.44 m/s² North.

To solve the given problem, we make use of newton's fundamental equation.

⇒ Newton's equation:

F = ma...................... Equation

⇒ Where:

⇒ make "a" the subject of the equation

From the question,

⇒ Given:

⇒ Substitute these values into equation 2

Hence, the magnitude and direction of the cart's acceleration are 1.44 m/s² North.

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The force of gravity increases when two objects move closer together. This is true statement.

The definition of force in physics is: The push or pull on a massed object changes its velocity.

An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.

A spring balance can be used to calculate the Force. Newton is the SI unit of force.

The force of gravity between two objects is inversely proportional to the square of the distance between them. Hence, the force of gravity increases when two objects move closer together. This is true statement.

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Answer:

an elevator we can use a counterweight that has the same mass as the empty box,

Explanation:

An Atwood machine consists of two masses connected by a rope through a pulley, in this case the acceleration of the system is proportional to the difference in masses, in the case of equal masses the acceleration is zero.

In the design of an elevator we can use a counterweight that has the same mass as the empty box, in that case when there are no people in the elevator, the natural acceleration is zero and there is no need to apply any force and therefore no power is needed. the motor.

When you have people inside, the power of the motor is what you need to lift the people, not the box, this reduces the power needed by the elevator motor by a high factor.

Using Atwood machine concept, we can state that the elevator can use a system of counterweights that balance the weight inside the box and minimize the force required to move the elevator up and down.

We can arrive at this answer because:

With that, we can say that an elevator can act as an Atwood machine.

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Answer:

workdone = force x displacement

force = work done /displacement

= 2000 / 50

= 40 N .

Answer:

when The spoon is pulled down with a small amount of energy : short distance travelled by Marsh mallow

When the spoon is pulled down with a higher amount of energy : Long distance travelled by Marshmallow

Explanation:

when The spoon is pulled down with a small amount of energy :

After the release of the spoon  the Marshmallow travels a relatively short distance because the acceleration is < mass of the mass of the Marshmallow

F = ma. hence a = F/m    where a < m

When the spoon is pulled down with a higher amount of energy

After the release of the spoon the marshmallow travels a relatively long distance when compared to the application of small amount of energy

Answer:

The length is [tex]s = 3.73 \ m[/tex]

Explanation:

From the question we are told that

  The speed is  [tex]v = 3.054 \ m/s[/tex]

  The acceleration [tex]a = -0.7762 m/s^2[/tex]

   The time taken is  [tex]t = 1.51 \ s[/tex]

Generally from kinematics equation the length of the inclined plane is mathematically represented as

         [tex]s =ut + \frac{1}{2} * at^2[/tex]

=>      [tex]s = 3.054 *1.51 + \frac{1}{2} * (-0.7762) *(1.51)^2[/tex]

=>   [tex]s = 3.73 \ m[/tex]

Answer:

The movement of heat from a warmer object to a cooler one is called heat transfer.

The units of matter in the correct sequence from smallest to largest will be  Protons, atoms, rock particles, bricks, buildings. Option D is correct.

Atom is the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.

The atom consists of matter that may be split without releasing electrical charges.

In the nucleus, proton and the neutron is existing,the atom is the fundamental part of the particle. Many particle combines to form bricks used in the construction of building.

The units of matter in the correct sequence from smallest to largest will be  Protons, atoms, rock particles, bricks, buildings.

Hence, option D is correct.

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Answer:

72 [km/h]

Explanation:

To solve this conversion we need to perform a dimensional analysis, in a simple way.

[tex]20\frac{m}{s} *1\frac{km}{1000m}*60\frac{s}{1min}*60\frac{min}{1hr}\\ = 72\frac{km}{h}[/tex]

The cannonball travels horizontally before it reaches the ground at an angle of 30° above the horizontal with an initial velocity of 26 m/s is 59.73 meters.

When anything is moving, its velocity tells us how quickly that something's location is changing from a certain vantage point and as measured by a particular unit of time.

If a point travels a specific distance along its path in a predetermined amount of time, its average speed throughout that time is equal to the traveled distance divided by the travel time. For instance, a train traveling 100 km in two hours is moving at an average speed of 50 km/h.

Given:

The initial velocity of a cannonball, u = 26 m/s,

Calculate the range of the cannonball by following the formula,

R = [tex]u^2[/tex]sin2θ / g

Here R is the range, and θ is the angle of projection.

Substitute the values,

R = [tex]26^2[/tex] sin2*30 / 9.8

R  = 59.73 meters

Therefore, the cannonball travels horizontally before it reaches the ground at an angle of 30° above the horizontal with an initial velocity of 26 m/s is 59.73 meters.

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Explanation:

Substances with their density less than that of water which is 1 g/cm³ will float on it whiles those greater than that of water will sink into the water

From the question the density of the object is greater than that of water so the object will sink into the water

Hope this helps you

Answer:

The rock will sink because it is more dense than water.

Explanation:

Answer:

An increase in the mass on the string will cause an increase in the period.

Explanation:

We'll begin by writing an expression showing the relationship between the period and mass. This is shown below:

T = 2π√(m/K)

Where:

T is the period of oscillation.

m is the mass of the object.

K is the spring constant.

T = 2π√(m/K)

From the above formula:

The period (T) is directly proportional to the square root of mass (m) and inversely proportional to the square root of the spring constant (K). This implies that an increase in the mass of the object on the spring will result in an increase in the period of oscillation and a decrease in the mass of the object will also decrease the period of oscillation.

Answer:

A) acceleration because it's definitely change in velocity definition

Answer:

Atoms

Explanation:

That's what everything is made up of.

Explanation:

given that the raven flies south for

time= 10 sec

speed= 10km/s

we know that speed=distance/time

distance=speed*time

distance=10*100

distance=1000m

distance=1km

also flies

distance=0.5km = 500m

time= 50 sec

speed= distance/time

speed=500/50

speed= 10m/s

speed= 0.01km/s

The average speed of an object is defined as the distance traveled divided by the time elapsed.

average speed= (1000+500)/10+50

average speed= (1500)/60

average speed= 25m/s

average velocity= (10km/s+0.01km/s)/2= 10.01/2= 5.005km/s

[tex]v = 3.7 \times {10}^{ - 6} \: \: \frac{cm}{s} [/tex]

[tex]3.7 \times {10}^{ - 6} = \frac{x}{89000} \\ [/tex]

Multiply sides by 89000

[tex]3.7 \times {10}^{ - 6} \times 89 \times {10}^{3} = x [/tex]

[tex]37 \times {10}^{ - 1} \times 89 \times {10}^{ - 3} =x [/tex]

[tex]37 \times 89 \times {10}^{ - 4} = x [/tex]

[tex]x = 3293 \times {10}^{ - 4} \: \: cm [/tex]

And we're done.....♥️♥️♥️♥️♥️

You had me worried there for a second.  I thought you were going to ask how much the time changes, or how much the speed changes as it hits the ground, and I was gonna skip this question and go to bed.

But the acceleration won't change.  That's always 9.8 m/s².  That's the acceleration of gravity on Earth. It doesn't depend on what you drop, or what its mass is, or how heavy it is, or what color it is, or how high you drop it from. The only way you can change it is to drop the rock through air or water, or on a different planet.

Answer:

Mass of a body is fixed everywhere. True

Explanation:

Since amount of a matter is not dependent of place or position therefore it remains same at everywhere.

Hence value of mass of a body is fixed everywhere.

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Explanation:

D = M/V

We rearrange this equation to get V = M/D

So 14 g/7 g/mL,

the grams cancel out, and we're left with 2 mL.

D is the answer.

The volume of water displaced by the body is 2 ml.

Volume of a body is amount of space occupied by a body. As it has only magnitude (no direction), it is a scalar quantity. SI unit of volume is [tex]m^{3}[/tex].

Now, it is given that,

Mass of the object  is 14 grams.

Density of the object is 7 g/ml.

So, volume of the object will be = (mass of the object)/(density of the object)

= 14 grams/(7 g/ml).

= 2 ml.

When the object is placed in water, it sinks. That's why, volume of water displaced by it is equal to the total volume of the body.

Hence, The volume of displaced water is 2 ml.

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Answer:the particles that make up the aluminum bar are moving more slowly

Explanation:just did it on

A bar of gold has a temperature of 31°C, and a bar of aluminum has a

temperature of 27°C. Because the particles that make up the aluminum bar are moving more slowly.

Temperature is a physical quantity which measures hotness and coldness of a body. Temperature measures the degree of vibration of molecule in a body. Temperature is measured in centigrade (°C), Fahrenheit (°F) and Kelvin (K) in which Kelvin (K) is a SI unit of temperature.

Absolute scale of temperature means Kelvin scale of temperature. relation between Kelvin(K) and centigrade (°C), °C= K - 273.15 from equation, 273.15 K means 0 °C, which is freezing point of water (ice). when we give temperature to the body, its molecule or atom absorbs thermal energy and vibrate about their mean position.

Amplitude of vibration get increases as we go on increasing temperature and for higher temperature force of attraction between molecules gets weaker. Hence for higher temperature, due to weaken the force of attraction between molecule, solid goes into liquid state. and further increase in temperature liquid goes into gaseous state.

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