Cell theory, the theory of evolution, the theory of relativity, and the big bang theory are all examples of scientific theories. The law of inertia, the law of universal gravitation, the laws of thermodynamics, and the law of independent assortment are all examples of scientific laws. What is the primary difference between scientific theories and scientific laws? A. Scientific theories are often discarded and replaced by completely different theories. B. Scientific laws have been proven without exception under certain stated conditions. C. Scientific laws can change over time as new technology is developed and new data is collected. D. Scientific theories are educated guesses still need to be verified through experimentation.

Answer:

Physical measures:  Reduction of internal friction,  high static friction tire system

chemist. : air-fuel ratio as efficient

Explanation:

A go-Kart is a vehicle that can be with a motor or with pedals, which is in contact with the ground.

Physical measures that help increase vehicle speed are:

* Reduction of internal friction, use bearings, with greased joints to reduce friction

* Decreased friction when forward creating an aerodynamic raindrop shape, sharp at the front and with a rapid descent at the rear, but without abrupt cuts to the geometry

* Path difference for air passing through the top and bottom, to create a downward force help lower the car by increasing speed

* A high static friction tire system so you can move faster on surfaces and take turns faster

* A shifting system to have an effective torque either pedal or motor, gear shifting system

From the point of chemist.

* Obtain an air-fuel ratio as efficient as possible to increase the force per unit of fuel.

Answer:

he correct answer is 7       3 10⁻⁹ s

Explanation:

The speed of light is constant, so we can use the uniform motion ratios

         v = x / t

         t = x / v

let's calculate

        t = 1 / 2.9972 10⁸8

       t = 3.336 10⁻⁹ s

the correct answer is 7       3 10⁻⁹ s

Answer:

288 Joules

Explanation:

Work= delta kinetic energy. To find the work required to stop the kitten, you have to find the delta kinetic energy between when the kitten is moving and when it is stopped. Since it is not moving when it's stopped, it has no kinetic energy. So to find the work, just find the kinetic energy of the kitten moving at 12m/s.

KE=1/2((m)(v^2)), therefore

delta KE=(1/2)*((4kg)*((12m/s)^2))-0

The work done must this force do to stop the kitten will be "288 Joules". To understand the calculation, check below.

According to the question,

Mass of kitten, m = 4 kg

Speed, v = 12 m/s

Acceleration, a = 3 m/s²

We know the formula,

→ Kinetic energy, K.E = [tex]\frac{1}{2}[/tex] mv²

then,

→ ΔK.E = [tex]\frac{1}{2}[/tex] mv² - 0

By substituting the values, we get

           = [tex]\frac{1}{2}[/tex] × 4 × (12)² - 0

           = [tex]\frac{1}{2}[/tex] × 4 × 144 - 0  

           = 2 × 144

           = 288 Joules

Thus the above response is correct.

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Answer:

t = 2.01 seconds

Explanation:

It is given that,

The acceleration of the elevator is 4.55 m/s².

We need to find time taken by you to reach a speed of 11 m/s

The initial velocity of the person is equal to 0 (at rest). Let t is the time.

Using equation of kinematics as follows :

v = u +at

Acceleration = g-a and u = 0

So,

[tex]t=\dfrac{v}{g-a}\\\\t=\dfrac{11}{10-4.55}\\\\t=2.01\ s[/tex]

So, 2.01 seconds is taken to reach a speed of 11 m/s.

Explanation:

Given that,

Current passes through our chest is 0.3 A

The current persists for 3.06 minutes

We need to find the number of conduction electrons pass through your heart. Charge flowing divided by time equals current. Also, q = ne

[tex]I=\dfrac{ne}{t}\\\\n=\dfrac{It}{e}\\\\n=\dfrac{0.3\times 3.06\times 60}{1.6\times 10^{-19}}\\\\n=3.44\times 10^{20}[/tex]

So, [tex]3.44\times 10^{20}[/tex] electrons would pass through your heart.

The velocity is a vector quantity. The velocity of center G of the column after it has moved 5 ft is 5.18 ft.

First, the potential energy of column,

[tex]U_{12} = \int\limits^5_0 {F} \, dx[/tex]

Here, the column moves from zero and displaces 5 ft.

[tex]F[/tex] - force = 1500 lbs

Thus,

[tex]U_{12 } = 7500\rm \ ft\ lbs[/tex]

Now, total kinetic energy at position 2,

[tex]T_ 2 = \dfrac 12 mv_2^{-2} + \dfrac 12 \vec I \omega_2^2[/tex]

Where,

m  = 372.67 slugs

r = 2 ft

Since,

[tex]\omega_2 = \dfrac {\vec V}{r}[/tex]

So,

[tex]7500 = \dfrac {12000}{2g}v_2^{-2}+\dfrac {12000}{4g}r^2 \times \dfrac {\vec V}{r}\\\\\vec v_2 = 5.18 \rm \ ft[/tex]

Therefore, the velocity of center G of the column after it has moved 5 ft is 5.18 ft.

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Answer: the answer is true :-)

Explanation:

Answer:

C) mass number

Explanation:

I got it correct on edge

Answer:  c

Explanation:

Explanation:

Distance = rate × time

1 m = (2.99792×10⁸ m/s) t

t = 3.33565×10⁻⁹ s

Light is the fastest thing in the universe. The speed of light is 2.99792 x 10⁸ m/s . The time that light takes to cover a distance of 1 meter is just 3.39  x 10⁻⁹seconds.

Speed is a physical quantity that means the distance in meter covered by a moving body in one second.  The speed of light is  2.99792 x 10⁸ m/s. Light from sun only takes 8 min to travel to the earth surface.

The speed of a moving particle or wave is mathematically the ratio of distance and time. Thus time of travel can be found out from the distance and speed.

It is given that the distance travelled by light is 1 m and its speed is 2.99792 x 10⁸ m/s. Thus the time taken to  travel is calculated as follows:

Time = distance/speed

         = 1 m/ (2.99792 x 10⁸ m/s)

         = 3.39  x 10⁻⁹s

Therefore, the time that light takes to cover a distance of 1 meter is just 3.39  x 10⁻⁹seconds.

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Answer:

The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. ... increases, the force of gravity decreases. If the distance is doubled, the force of gravity is one-fourth as strong as before.

Answer:

Hey there!

Kelvin is correct. Farenheit and Celsius are scales derived from the Kelvin scale. For example, K=C+273.15 is the conversion between Kelvin and Celsius.

Let me know if this helps :)

Answer:

hello some parts of your question is missing below is the complete question

A 60.0 kg archer standing on a friction-less ice shoots a 100g arrow at a speed of 80.0 m/s to the right .When the arrow is released, how does the the force on the arrow (by the bow) compare to the force on the archer (by the bow)?

Answer : The force on the arrow is larger than the force on the archer because the arrow has a higher final velocity

Explanation:

we can compare The force on the arrow  to the force on the archer by using the final velocities of the archer and the arrow ,hence The force on the arrow is larger than the force on the archer because the arrow has a higher final velocity and this is according to Newton's law which states for a every action there is an equal reaction i.e the force applied on the arrow will be the opposite of the force on the archer

Answer:

Yes

Explanation:

Scientific concept is a scientific theory or law that gives proof of how and why a natural event or process occurs.

Yes, scientific ideas and concepts can be changed because the research never stop and when scientists come with a new theory which is more strong than old theory, the old theory is required to be changed.

For example: In the scientific concept of classification of biodiversity, earlier organisms were classified into binomial system including plant and animal kingdoms but now we have five kingdoms that includes monera, protists, fungi,  plant and animal kingdoms.

Answer: Identify needs

As a company wants to build a new type of spaceship for transporting astronauts to the moon. The company should identify the needs first. The correct option is D.

A spacecraft is a vehicle or machine that is designed to travel through space.

Spacecraft, a type of artificial satellite, are used for a variety of purposes, including communications, Earth observation, meteorology, navigation, space colonization, planetary exploration, and human and cargo transportation.

In addition to science instruments, a spacecraft has a number of critical components such as an engine, power subsystem, steering system, and communications system.

The majority of these systems are housed in the service module, while the science instruments are housed in the payload module.

A company wishes to construct a new type of spaceship capable of transporting astronauts to the moon. The company should start by identifying the needs.

Thus, the correct option is D.

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Answer:

v = 44.27 m / s

Explanation:

This is an exercise in kinematics since they ask the maximum speed of the train

           v² = v₀² + 2 a x

a train departs with zero initial velocity

           v² = 2 a x

           v = √ 2ax

calculate

           v = √ (2 1.21 810)

            v = 44.27 m / s

in this solution we have assumed that the train uses the entire distance with acceleration

Answer:

C. the velocity

Explanation:

Answer:

1.) As rocket mass increases, acceleration decreases

2.) The inverse of the mass of the boat

3.) Zero

4.) When the velocity increases

5.) It increases

Explanation:

took the test, all were correct

Answer: atoms gain energy as a solid changes to a gas

Explanation:

Answer:

atoms gain energy as a solid changes to a gas

Explanation:

Answer:

14.3 x 10^8Hz

Explanation:

Using

Frequency= speed of light /wavelength

Then substituting

3*10^8m/s / 0.21m

= 14.3 x10^8 Hz

Answer:

They are weightless because there is no external contact force pushing or pulling upon their body.

Explanation:

Answer:

nope because the ground created a normal force

Explanation:

Answer:

Level 4 to level 2

Explanation:

Electrons in an atom are contained in specific energy levels (1, 2, 3, and so on) having different distances from the nucleus. When light is emitted by electrons from one energy level to a lower level, level 4 to level 2 has the greatest energy.

Hence, the correct option is "Level 4 to level 2".

Answer: (1) 0.0 m

Explanation: In physics, displacement is defined as the change in position of a moving object. It is a vector, so has magnitude and direction, determined by a referential create to the system, i.e., the moving object. Mathematically, displacement is calculated by: [tex]\Delta x=x_{f}-x_{0}[/tex], in which:

For the basketball player, he runs 30m, 3 times, court and back. Assuming the initial position is 0:

[tex]\Delta x=0-0[/tex]

[tex]\Delta x[/tex] = 0.0

Since displacement is given by, only, the initial and final position and the player started at the initial point and ended at the initial point of the court, displacement is 0.

Answer:ball, ramp, and angle

Explanation: these are the three things that are controls because you can control them

Answer:

Cathode: The positive electrode of a cell. Cell: A single encased electrochemical unit (one positive and one negative electrode) which exhibits a voltage differential across its two terminals.

Answer:

Cell

Explanation:

A cell is a single encased electrochemical unit (one positive and one negative electrode) which exhibits a voltage differential across its two terminals.

load distance*l=effort distance*e

o.5*500=x*1.25

250/1.25=x

200=x

ma=load/effort

500/200

2.5

vr=ed/ld

1.25/0.5

2.5

effciency=ma/vr*100

100%

Answer:

If the frequency of the source is increased the current in the circuit will decrease.

Explanation:

The current through the circuit is given as;

[tex]I = \frac{V}{Z}[/tex]

Where;

V is the voltage in the AC circuit

Z is the impedance

[tex]Z = \sqrt{R^2 + X_L^2}[/tex]

Where;

R is the resistance

[tex]X_L[/tex] is the inductive reactance

[tex]X_L[/tex] = ωL = 2πfL

where;

L is the inductance

f is the frequency of the source

Finally, the current in the circuit is given as;

[tex]I = \frac{V}{\sqrt{R^2 + (2\pi fL)^2} }[/tex]

From the equation above, an increase in frequency (f) will cause a decrease in current (I).

Therefore, If the frequency of the source is increased the current in the circuit will decrease.

Solution :-

Given :

Distance 1 = 30 km

Distance 2 = 70 km

We know that speed = distance/time

and, Average speed = total distance/total time taken

When the train acquired a speed of 30 km/hr, the time taken = 30/30 = 1 hour

Average speed = 9distance 1 + distance 2)/(time 1 + time 2)

AS time 2 or t2 is time taken for the second part of the journey of 70 km

⇒ 40 = 100/(1 + t2)

⇒ 40 + 40t2 = 100

⇒ 40t2 = 100 - 40

⇒ 40t2 = 60

⇒ t2 = 60/40

⇒ t2 = 1.5

So, t2 or time taken to travel the second part of the journey is 1.5 hours.

Speed of the second part of the journey = distance 2/time 2

⇒ 70/1.5

⇒ 46.666 km/hr or 46.7 km/hr.

Hence the answer is = 46.666 km/hr or 46.7 km/hr.

Hope it helped u if yes mark me BRAINLIEST!

Tysm!

:)

The energy responsible for temperature is referred as thermal energy. the movement of thermal energy from a warmer object to a cooler object is called heat.

Heat is energy that is transferred from one body to another as a result of a temperature difference.

When two bodies at different temperatures come into contact, energy is transferred (i.e., heat flows) from the hotter to the colder.

Thus, the correct option is A.

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Answer:

No electric field will exist.

Explanation:

Given the following:

In other to for the proton to remain stationary in space, the electric field acting on the proton will be 0 or no electric field will exist. From the formulae ;

F = qE ; where q = charge of the particle

E = electric field intensity

The electric field force = F

At a stationary position in space, the electric field intensity = 0

F = qE = q * 0 = 0.

Also according to Heisinberg, measuring the momentum and position of a quantum object becomes more and more uncertain when measured simultaneously.

Here, one of position or momentum is know, measuring the electric field becomes very uncertain.

Answer:

The total distance traveled is 28 inches.

The displacement is 2 inches to the east.

If an ant travels toward the right along a meter stick. If it starts at the 25.00 cm mark and then travels to the 80.00 cm mark, the distance covered by the and would be 55 centimeters and the displacement covered by the ant would be 55 centimeters as well.

Displacement describes this shift in location.

As given in the problem statement If an ant travels toward the right along a meter stick. If it starts at the 25.00 cm mark and then travels to the 80.00 cm mark, then we have to find the distance and the displacement covered by the ant,

For a straight linear motion in a single direction, the distance is equal to the displacement covered by the object.

Thus, the the distance covered by the ant would be 55 centimeters and the displacement covered by the ant would be 55 centimeters as well.

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Answer:

Hi! This is true.

Explanation:

During a storm, high winds are persistent. Taller trees have a longer length than short trees, making the structural integrity lesser. Shorter trees are closer to the ground and have a small chance of falling.

Hope this helped!