PHYSICS MIDDLE SCHOOL

Inertie is the resistance to change in motion so inertia depends solely on what?

Answers

Answer 1
Answer: Inertie is the resistance to change in motion so inertia depends solely
on the mass of the object being coaxed to change its motion.

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Why is conserving energy resources not a simple problem with a simple solution?

Answers

Answer:

Because the uncontrolled and unreasonable use of energy resources in the past few decades has led to the depletion of conventional type of resources. Although, measures are taken at the government levels to control the energy consumption, these attempts only meet with little success. Public awareness is the only way to successfully deal with this problem.

Explanation:

Answer:

Because the uncontrolled and unreasonable use of energy resources in the past few decades has led to the depletion of conventional type of resources.

What is the frequency of a wave that has a wavelength of 20 cm and a speed of 10 m/s?50 Hz

200 Hz

0.5 Hz

10 Hz

Answers

Frequency = velocity/wavelength

Frequency = 10/20

Frequency = 0.5 Hz

What is the average acceleration of a jet ski that goes from rest to 10 m/s west in 4 s? Take the direction west to be positive, and east to be negative. A.
2.5 m/s2

B.
-2.5 m/s2

C.
0.4 m/s2

D.
-0.4 m/s2 PLZZZ HELP ASAP!

Answers


|acceleration| = (change in speed) / (time for the change)

                       = (10 m/s - 0)          /  (4 s)

                       =        (10 / 4) (m/s²)

                       =            2.5 m/s² .

The direction of the acceleration is west.

How are the relationships of elements in a group different from the relationships of elements in a period?

Answers

Group - similar reacting properties.
SIMILAR not identical
Period - ever increasing proton number
Answer 2: elements in the same period have the same amount of energy levels (in which electrons orbit around the atomic nucleus)elements in the same group have the same number of valance electrons (which are found in the outer most energy level)

How do contact forces such as friction differ from gravitational and magnetic forces?

Answers

"Contact" means "touching".  A contact force can't act on an object unless
they're touching. Friction is a contact force.

Gravitational forces pull masses together even if they're not touching.
Magnetic forces pull a piece of iron toward a magnet even if they're not touching.

Gravitational and magnetic forces are "non-contact" forces.

Whats the answer to this question

Answers

It is the first option because Rutherford had put forward the first option and Neils Bohr changed the model of an atom
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