Put them in order to smallest to largest: centimeter, femtometer, kilometer, light year, meter, nanometer​

Answer:

Speed = 8.79m/s

Explanation:

Given the following data;

Height = 4m

Horizontal distance = 8m

To find the time, we would use the second equation of motion

S = ut + ½at²

We know that acceleration due to gravity is equal to 9.8m/s²

Initial velocity, u = 0

Substituting into the equation, we have;

4 = 0(t) + ½*9.8*t²

4 = 0 + 4.9*t²

4 = 4.9t²

t² = 4/4.9

t² = 0.82

Taking the square root of both sides, we have;

t = 0.91 secs

To find the speed;

Speed = horizontal distance/time

Speed = 8/0.91

Speed = 8.79m/s

Therefore, the pelican's speed is 8.79 meters per seconds.

Answer:

A

Explanation:

Answer:

Orbit/circumference = 471.24 million .

c = 2πr

150/2 = radius

radius = 75.

π = 3.14

2 x π x 75 = 471.24

Answer:

4 Newtons

Explanation:

Answer:

4

Explanation:

Answer:

All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms. ... Therefore, the atomic number of an atom also tells you how many electrons the atom has. This, in turn, determines many of the atom's chemical properties.

Answer: In that case, Put something like "My hypothesis is that the car will take (x) seconds to get to checkpoint 1, (x) seconds to get to checkpoint 2, (x) seconds to get to checkpoint 3, and (x) seconds to get to checkpoint 4" Replacing x with random numbers, or number close to the actual found numbers, but honestly as long as the guesses arent outrageous you should get the question right

Explanation:

I formulate a hypothesis which is based on his observations as to what happens when both the rock and the wood are immersed in water.

Density is described as mass per unit volume which is an important parameter for understanding fluid and its properties. Its unit is kilogram per cubic meter.

The mass and density relation is given as:

mass = density × volume

In this scientific investigation if the volume or density of objects determines whether solid objects float or sink in water, I performed a density, mass, and volume experiment using a rock and a standard-sized piece of wood. It is important that the chosen piece of wood is larger than the rock where the rock is small enough to fit inside the measuring cylinder.

Thus, I formulate a hypothesis which is based on his observations as to what happens when both the rock and the wood are immersed in water.

Learn more about the Density, here:

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Your question is incomplete, most probably the complete question is:

Density of solids What is your hypothesis (or hypotheses) for this experiment?.

The weight of a 75 kg person on Earth is 735 N, The correct option is D.

Acceleration due to gravity is the acceleration that an object experiences due to the gravitational force exerted by a massive body, such as Earth. The acceleration due to gravity on Earth is approximately 9.8 meters per second squared (m/s^2) and is denoted by the symbol "g".

The acceleration due to gravity is a vector quantity, which means that it has both magnitude and direction. The direction of the acceleration due to gravity is always downwards, towards the center of the massive body.

The acceleration due to gravity is a constant value near the surface of the Earth, but it can vary slightly depending on altitude, latitude, and the composition of the Earth's interior. For example, at higher altitudes, the acceleration due to gravity decreases slightly, while at the equator, it is slightly greater than at the poles due to Earth's rotation.

The acceleration due to gravity plays an important role in many physical phenomena, including free fall, projectile motion, and the behavior of fluids in containers.

Here in the Question,

The weight of a 75 kg person on Earth can be calculated using the formula:

weight = mass x acceleration due to gravity

Substituting the given values, we get:

weight = 75 kg x 9.8 m/s^2

weight = 735 N

Therefore, the weight of a 75 kg person on Earth is 735 N, which is option D.

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Answer:

Calculate 'R' of convex mirror and height of the real image

the radius of the convex mirror is 48cm

Explanation:

Distance between convex and concave mirror is =60cm

Radius of the concave mirror (R) = 200cm

For the concave mirror, u = ∞

V = {R}/{2}=100cm

The object for the convex mirror and the final image is on the pole of the concave mirror, and distance between convex and concave mirror is 60cm

u_1=60-100 =-40cm

Object will be behind the convex mirror

1/f=1/40+1/60  

f=24cms

the radius of the convex mirror is 48cm

K.E = ½ mv²

Explanation:

The formula of Kinetic Energy

K.E = ½ mv²

Where,

m = mass of object

v = velocity of object

The Standard Unit of kinetic energy is Joule, while the Imperial Unit of kinetic energy is foot-pound

-TheUnknownScientist

Answer:

[tex]\boxed{\bold { \large { \boxed {KE=\frac{1}{2} mv^2}}}}[/tex]

Explanation:

Kinetic energy formula

[tex]\displaystyle KE=\frac{1}{2} mv^2[/tex]

[tex]\displaystyle KE \Rightarrow \sf kinetic \ energy \ (J)[/tex]

[tex]\displaystyle m \Rightarrow \sf mass \ (kg)[/tex]

[tex]\displaystyle v \Rightarrow \sf velocity \ (m/s)[/tex]

Answer:

Explanation:

We can solve this problem using the principle of conservation of energy.

Starting point. For higher up the ramp

          Em₀ = U = m g h

where h is the height of the ramp h = 3.00 m

Final point. For low

          Em_{f} = K = ½ m v²

as there is no friction the mechanical energy is conserved

          Em₀ = [tex]Em_{f}[/tex]

          m g h = ½ m v²

          v = √ (2g h)

let's calculate

         v = √(2 9.8 3.00)

         v = 7.668 m / s

Answer: 14

Explanation: 20-23 is normal.

Answer:14

Explanation:hope this helps

Answer:

a = 1.666... m/s²

Explanation:

a = v2 - v1 / t2 - t1

a = 21m/s - 14m/s / 6s - 0s

a = 7m/s / 6s

a = 1.666... m/s²

Answer:

C. 2m to the right of the rollerblader

Explanation:

The turtle is 2m to the LEFT of the rollerblader, so its the only option not describing the position of the turtle:)

Hope this helps, have a great day;)

Answer:

The ball reaches Barney  head in  [tex]t = 8 \ s[/tex]

Explanation:

From the question we are told that

 The rise velocity is  [tex]v = 14.70 \ m/s[/tex]

  The height considered is [tex]h = 196 \ m[/tex]

   The horizontal velocity of the large object is  [tex]v_h = 8.50 \ m/s[/tex]

Generally from kinematic equation  

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

Here s is the distance of the object from Barney head ,

        u is the velocity of the object along the vertical axis which is equal but opposite to the velocity of the helicopter

So  

     [tex]u = -14.7 m/s[/tex]

So

    [tex]196 = -14.7 t + \frac{1}{2} * 9.8 * t^2[/tex]

=  [tex]4.9 t^2 - 14.7t - 196 = 0[/tex]

Solving the above equation using quadratic formula  

    The value of  t obtained is  [tex]t = 8 \ s[/tex]

The applied force is parallel to the ground, so the net vertical force on the sled is 0. By Newton's second law, this means the normal force and weight of the sled cancel out:

n - w = 0

n = w

n = m g

n = (15.7 kg) (9.80 m/s²)

n = 153.86 N

Answer:

A

Explanation:

Hubble’s law states that galaxies that are farther away have a greater red shift, so the speed at which a galaxy is moving away is proportional to its distance from the Earth. Red shift is a phenomenon due to Doppler shifting, so the shift of light from a galaxy to the red end of the spectrum indicates that the galaxy and the observer are moving farther away from one another. Doppler shifting also is found in the Energy and Waves section of this course.

Answer:

300kgm/s

Explanation:

Given parameters:

Mass of TV = 30kg

Height of building  = 5m

Maximum speed  = 10m/s

Unknown:

Momentum before it hits the ground = ?

Solution:

Momentum is the quantity of motion a body possess or contains. It is expressed as;

      Momentum  = mass x velocity

 Insert the parameters and solve;

   Momentum  = 30 x 10

   Momentum  = 300kgm/s

Hi sorry for yesterday

Explanation:

Answer:Health

Throughout her work with radium, Marie was unaware of the effects of radioactivity exposure on the body. In her lab, she would keep tubes of radium in her pocket. [3] She began to suspect that radium negatively impacted health when one of her fellow researchers died of a blood disease, and then a few years later her personal assistant died of a blood disease. Even though she suspected that radium exposure was bad for her health, she did very little to monitor her own blood. In 1932, she broke her wrist and the break took much longer to heal than it should have. She then began to notice that her vision was deteriorating and radiation burns on her fingers were becoming more and more painful. Some days she felt too ill to even go to the lab, and finally on July 4, 1934, Marie died from aplastic anemia. [1]

Radium Exposure Treatments

Marie suspected that her health was being negatively impacted by radium exposure, but did nothing about it, most likely because there weren't any effective treatments for radium poisoning yet. At the time, scientists knew that radium was metabolized like calcium. In an attempt to remove it from the system, they manipulated calcium intake. [4] This caused little to no improvements, so parathyroid hormone was added to the treatment. Again, there was some reduction of radium, but not a significant amount. It wasn't until after Marie's death that they realized once radium is in the bones, it is extremely difficult to extract. The lack of therapies for radium exposure may explain why Marie just ignored her symptoms, because she was fully aware of her fate. [4]

© Jenna Gray. The author warrants that the work is the author's own and that Stanford University provided no input other than typesetting and referencing guidelines. The author grants permission to copy, distribute and display this work in unaltered form, with attribution to the author, for noncommercial purposes only. All other rights, including commercial rights, are reserved to the author.

Explanation:

Answer:

cause they were dumb

Explanation:

Answer:

The roller coaster gains potential energy as they reach the top of the hill. And then the energy changes to kinetic energy.

Explanation:

Answer:

The ion has fewer electrons

Explanation:

As Rubidium forms a positive ion Rb⁺ the number of electrons becomes fewer for the atom.

Rubidium forms the positive ion (Rb+) because it has fewer electrons than the neutral atom.

HOW DOES AN ATOM BECOME POSITIVELY CHARGED:

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Answer:

A is correct!

Explanation:

e2020

Answer:

a

Explanation:

right on edge :)

Answer:

what sport bruh

Explanation:

Answer:

in wat sport exactly

Explanation:

in eat sport

Answer:

n physics, the kinetic energy (KE) of an object is the energy that it possesses due to its motion.[1] It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.

In classical mechanics, the kinetic energy of a non-rotating object of mass m traveling at a speed v is {\displaystyle {\begin{smallmatrix}{\frac {1}{2}}mv^{2}\end{smallmatrix}}}{\begin{smallmatrix}{\frac {1}{2}}mv^{2}\end{smallmatrix}}. In relativistic mechanics, this is a good approximation only when v is much less than the speed of light.

The standard unit of kinetic energy is the joule, while the imperial unit of kinetic energy is the foot-pound.

Explanation:

Answer:

kinetic energy is the energy that an object posses due to their motions.

Explanation:

eg:When you let go of that ball and let it fall, the potential energy converts into kinetic energy, or the energy associated with motion. There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical.

Answer:

Requirements to become an Osteologist

Explanation:

After completing the bachelor's degree, students should begin working towards a master's degree or Ph. D specializing in forensic anthropology. Forensic anthropology is closely related to osteology and it will help in the forensic work.

Answer:

If an object is in motion, then the object will stay in motion because they go the same direction unless acted upon by an unbalanced force.

Explanation:

i got it right . :)

Answer:

1 x 10¹²J

Explanation:

Given parameters:

Mass of the water pumped  = 2.05 x 10⁸kg

Height  = 500m

Unknown:

Potential energy = ?

Solution:

The potential energy amassed by water at this height is expressed as;

           P.E  = mgH

m is the mass

g is the acceleration due to gravity

H is the height

        Insert the parameters and solve;

     P.E  = 2.05 x 10⁸ x 9.8 x 500 = 1 x 10¹²J