PHYSICS MIDDLE SCHOOL

The height of a flagpole is 8.5 meters tall. If the length of the meter stick shadow is 1.5 meters long ,what would be the the length of the flagpoles shadow?

Answers

Answer 1

Answer:

Explanation:

Similar triangles:

1.5 m / 1 m = x / 8.5 m

x = 12.75 m

Round as needed.

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

Answers

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

What dose it mean to say that mass is conserved during a physical change

Answers

Answer:

When a physical change occurs, the mass of the substance is conserved. This means that the total mass of the substance remains the same from beginning to end. The physical properties of the substance, such as size and shape, may change, but the amount of matter in the substance does not change.

Explanation:

When there is no change in chemical composition of a substance then it is known as physical change.

When we say that mass is conserved during a physical change then it means that total mass of the substance or object will remain the same from beginning till the end.

For example, a metal box of mass 20 grams is beaten with hammer. Its shape will change which is a physical change and after beaten with the hammer its mass still remains 20 grams.

As the mass oscillates on a spring, when is displacement at its maximum and velocity equal to zero? A. when it is partially compressed
B. when it is at the equilibrium position
C. when it is fully stretched
D. when it is at near rest

Answers

Answer:

option (c)

Explanation:

The velocity of the oscillating body is zero when it is at its maximum displacement position from its mean position.

So, when the spring is fully stretched, means at maximum displacement the velocity is zero.

C. when it is fully stretched

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

jenny measures the outside temperature as 16 degrees celcius,61 degrees Fahrenheit. she observes precipitation falling from the clouds in a solid form.what type of precipitation is jenny most likely observing. A)hail B)rain C)sleet D)snow

Answers

A.hail is a reasonable answer

A. The temperature is too high for snow or sleet to fall, because both need temperatures lower that 32 degrees F. Jennifer observed precipitation falling from the clouds in a SOLID form, meaning rain is out of the question.

A squirrel (mass 0.9 kg) is running across the road at a speed 4.0 m/s. What is thesquirrel's kinetic energy?

Answers

The kinetic energy of the squirrel with a mass of 0.9 Kg running with a speed of 4 m/s is 7.5 J.

What is kinetic energy?

Kinetic energy of an object is a form of energy generated by virtue of the motion of the object. Kinetic energy is dependent on the mass and velocity of the body.

When a body starts to move its potential energy starts to convert to kinetic energy and the kinetic energy will be maximum at the highest speed. When the object slow down and pause in a position it gains potential energy again.

The kinetic energy KE = 1/2 mv²

Given mass = 0.9 Kg

velocity = 4 m/s.

KE = 1/2 0.9 Kg × 4² m/s

= 7.5 J

Therefore, the kinetic energy of the squirrel is 7.5 J.

To find more on kinetic energy, refer here:

brainly.com/question/26472013

#SPJ2

Answer:

A). Option A

B). Option B