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jasenka [17]
3 years ago
5

What are ways to improve the design of this experiment? Check all that apply

Physics
1 answer:
Serhud [2]3 years ago
3 0

Answer:

B,D,E

Explanation:

I got you

B. Experiment with a wider range of materials.

D.Use a laboratory galvanometer to make precise measurements.

E. Test the strength of the electromagnet by varying the number of wire coils.

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A solid sphere rolls along a horizontal, smooth surface at a constant linear speed without slipping. What is the ratio between t
Pavlova-9 [17]

The ratio of the rotational kinetic energy about the center of the sphere and the total kinetic energy of the sphere is 2/7.

<h3>What is the rotational kinetic energy of a sphere?</h3>

The rotational kinetic energy of the sphere is directly proportional to the square of angular acceleration.

K = \dfrac 12 I\omega ^2

Where,

I = rotational inertia of sphere = 2/5MR²

Where M is the mass of the sphere and R is the radius of the sphere,

ω = angular acceleration of sphere = V/R

Where V is the speed of the sphere.

So,

K = 1/2 × 2/5MR² × V²/R²

K = MV²/5

The translational kinetic energy of the sphere,

K' = \dfrac 12 MV^2

The total kinetic energy of the sphere,

K_t = K + K'

So,

K_t= \dfrac {MV^2}5 +\dfrac { MV^2}2\\\\K_t= \dfrac {7MV^2}{10}

Thus the Ratio of rotational kinetic energy to total kinetic energy,

\dfrac KK_t = \dfrac {\dfrac {MV^2}{5} }{ \dfrac {7MV^2}{10}}\\\\\dfrac KK_t = \dfrac 15 \times \dfrac { 10}7\\\\\dfrac KK_t= \dfrac 27

Therefore, the ratio of the rotational kinetic energy about the center of the sphere and the total kinetic energy of the sphere is 2/7.

Learn more about rotational kinetic energy:

brainly.com/question/14611300

3 0
2 years ago
Ibrahim is experimenting with his circuits. He made a circuit using a 12V battery and 6.5 ohm resistor. But then he realized he
SVETLANKA909090 [29]
7.5 V im pretty sure.
4 0
3 years ago
Read 2 more answers
a girl skateboards with a kinetic energy of 2543.2 J. if the girl and the skateboard have a total mass of 110 kg, what is her sp
zhuklara [117]
     Using the definition of kinetic energy, we have:

E_{c}= \frac{mv^2}{2}  \\ 2543.2*2=110v^2 \\ \boxed {v=6.8m/s}
6 0
3 years ago
In which tool are uranium atoms split to make electricity? A. turbine B. generator C. reactor D. condenser
svetoff [14.1K]
The tool that splits uranium atoms to make electricity is a nuclear reactor. A nuclear reactor is also known as an atomic pile.

Your answer is: C) Reactor 

Have an amazing day!

4 0
3 years ago
What is the area of space around a magnet called?
erma4kov [3.2K]

Answer:

These acts of attraction and repulsion are called “magnetism”, and the magnetic space around a magnet is called the “magnetic field”

Explanation:

8 0
3 years ago
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