What determines the atomic number of an atom? A.
the number of neutrons in two atoms of an element

B.
the number of electrons in the outer layer of any atom

C.
the number of protons in every atom of an element

D.
the number of protons plus the number of neutrons in an atom

Answers

Answer 1

Answer: C. the number of protons in every atom. I hope this helped. :) Brainliest answer please? :)

Answer 2

Answer: The number of protons in the nucleus of an atom determines an element's atomic number.

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A child is sledding. He starts at the top of the hill with a velocity of zero, and 3 seconds later he is speeding down the hill at 12 meters per second. What is the child's acceleration?

Answers

Magnitude of acceleration = (change of speed) / (time for the change) =

(12 m/s - 0) / (3 sec) =

12/3 = 4 m/s²

What's a challenge question ? Have we all passed the event horizon
and been spaghettified without knowing it ?

The spring is compressed a total of 3.0 cm, and used to set a 500 gram cart into motion. Find the speed of the cart at the instant it is released, assuming all the elastic potential energy is converted.

Answers

Answer:

1.15 m/s

Explanation:

Part of the question is missing. Found the missing part on google:

"1. A hanging mass of 1500 grams compresses a spring 2.0 cm. Find the spring constant in N/m."

Solution:

First of all, we need to find the spring constant. We can use Hooke's law:

$F=kx$

where

$F=mg=(1.5 kg)(9.8 m/s^2)=14.7 N$ is the force applied to the spring (the weight of the hanging mass)

x = 2.0 cm = 0.02 m is the compression of the spring

Solving for k, we find the spring constant:

$k=(F)/(x)=(14.7)/(0.02)=735 N/m$

In the second part of the problem, the spring is compressed by

x = 3.0 cm = 0.03 m

So the elastic potential energy of the spring is

$U=(1)/(2)kx^2=(1)/(2)(735)(0.03)^2=0.33 J$

This energy is entirely converted into kinetic energy of the cart, which is:

$U=K=(1)/(2)mv^2$

where

m = 500 g = 0.5 kg is the mass of the cart

v is its speed

Solving for v,

$v=\sqrt{(2K)/(m)}=\sqrt{(2(0.33))/(0.5)}=1.15 m/s$

Velocity-time graph worksheet?

Answers

Answer: yep

Explanation:

Answer:

yes

Explanation:

Table C. The Effects of a Magnet on Electric CurrentScenario
Observations of Compass Needle Movement in
Galvanometer
Magnet moving right
to left
(or top to bottom)
Magnet moving left to
right
(or bottom to top)
Magnet stationary
in coil
Pencil moving right to
left
(or top to bottom)
Pencil moving left to
right
(or bottom to top)

Can someone please help me

Answers

magnet moving left to right

Answer:

huh

Explanation:

do u need the whole table?

How do you find weight =mass×gravitational acceleration

Answers

That's a formula that shows the relationship between three quantities ...
weight, mass, and acceleration. If you know any two of them, then you
can use this formula to find the one you don't know.

Examples:

==> I have a rock with 2 kilograms of mass.
The gravitational acceleration on Earth is 9.8 m/s² .
How much does my rock weigh on Earth ?

   Weight = (mass) x (grav acceleration)
      = (2 kg) x (9.8 m/s²)
   = 19.6 newtons
      (about 4.41 pounds)

==> My brother weighs 770 newtons (about 173 pounds) on Earth.
   What is his mass ?

       Weight = (mass) x (grav acceleration)

   770 newtons = (mass) x (9.8 m/s²)
Divide each side
by 9.8 m/s²:    770 newtons / 9.8 m/s² = mass

    78.57 kilograms = mass

==> When I went to the Moon, I took along my 2-kilogram rock.
   I weighed my rock on the Moon.
   It weighs 3.25 newtons (about 0.73 pound) there.
   What is the gravitational acceleration on the Moon ?

   Weight = (mass) x (grav acceleration)

   3.25 newtons = (2 kg) x (acceleration)

Divide each side
by 2 kilograms: (3.25 newtons)/(2 kg) = acceleration

    1.63 m/s² = grav acceleration on the Moon

By plugging in the variables duh. Hahhha so look at your problem and plug in the numbers to what they are.

The speed of a pendulum is greatest

Answers

The speed of the pendulum is greatest at the midpoint of the pendulum marked 3.

What is a pendulum?

A pendulum is an device that can be used to demonstrate oscillation. We know that in pendulum the potential energy is maximum at the ends of the pendulum.

Thus, the speed of the pendulum is greatest at the midpoint of the pendulum marked 3.

Learn more about pendulum:brainly.com/question/14759840?

#SPJ9

Answer:

The speed of the pendulum is at maximum at x=0

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