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3 years ago

Jorge has made the hypothesis that the more he feeds a mouse, the shinier its fur will be, because the mouse will be healthier.

Physics

1 answer:

LuckyWell [14K]3 years ago

6 0

The correct answer is D. The amount of food he feeds each mouse

Explanation:

In research, the independent variable refers to the variable or factor that is manipulated by the researcher. Besides this, the independent variable affects the dependent variable or factor being studied. This implies in the case presented, the dependent variable is how shiny mice's fur is because this is the variable being studied; on the other hand, the independent variable is the amount of food Jorge feeds to each mouse because this is the factor Jorge would manipulate or change to prove if the amount of food has an effect on the fur of mice.

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Physics help!! 10pt

Butoxors [25]

<span>A. accelerate toward the more massive object is your answer. In fact, even the acceleration with accelerate, also known as the jer.k. The more massive object will pull on the smaller object and the smaller object will increase its speed towards the more massive object.

idk why jer.k is a swear</span>

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3 years ago

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A 0.25 kg mass is placed on a vertically oriented spring that is stretched 0.56 meters from its equilibrium position. If the spr

Vitek1552 [10]

Answer:

The speed of the ball when it reaches equilibrium position is 3.31 m/s

Explanation:

Given;

mass of the object, m = 0.25 kg

initial displacement of the object, h₁ = 0.56 m

spring constant, k = 105 N/m

displacement at equilibrium position, h₂ = 0

initial velocity of the object, v₁ = 0

velocity of the object at equilibrium position = v₂

The change in gravitational potential energy at the equilibrium position is given as;

ΔP.E = mg(h₂ - h₁)

The change in kinetic energy of the object at the equilibrium position is given as;

ΔK.E = ¹/₂m(v₂² - v₁²)

Apply the principle of conservation of mechanical energy;

ΔK.E + ΔP.E = 0

¹/₂m(v₂² - v₁²) + mg(h₂ - h₁) = 0

¹/₂m(v₂² - 0) + mg(0 - h₁) = 0

¹/₂mv₂² - mgh₁ = 0

¹/₂mv₂² = mgh

¹/₂v₂² = gh

v₂² = 2gh

v₂ = √2gh

v₂ = √(2 x 9.8 x 0.56)

v₂ = 3.31 m/s

Therefore, the speed of the ball when it reaches equilibrium position is 3.31 m/s

8 0

3 years ago

A poker is a stiff, nonflammable rod used to push burning logs around in a fireplace. for safety and comfort of use, the poker s

Valentin [98]

Answer: The poker stick should have low thermal conductivity and high specific heat.

Explanation: For a poker stick that is non flammable, it should have some properties which will not let it heat up faster.

Two properties that satisfy the poker stick are:

Specific heat
Thermal conductivity

Specific heat is defined as the amount of heat require to raise the temperature of a mass M by 1 °C. More the specific heat, more amount of heat will be required to raise the temperature of a substance.

Thermal conductivity is defined as the ability of a substance to conduct heat. More thermal conductivity means that the substance will get hot faster as it will conduct more amount of heat.

So, for a substance that should not conduct more heat like the poker stick must have high specific heat and low thermal conductivity.

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4 years ago

Seasonal changes in water temperature tend to remain within a narrow range. This is opposed to air temperature, which tends to f

Serjik [45]

It is because of the high specific heat of water.

Specific heat is the amount of heat needed to change the temperature of unit mass of a substance by one degree.

Specific heat of water is 4.186 kJ/kg K and that of air is 1 kJ/kg K. Thus, a given amount of heat will cause more change in the temperature of air than that of water.

5 0

3 years ago

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Luigi twirls a round piece of pizza dough overhead with a frequency of

viva [34]

The linear speed of the pepperoni is 0.628 m/s. Its direction is tangential to the circle.

We know that;

v = rω

r = radius of the piece = 10 cm or 0.1 m

ω = angular velocity

We have to convert 60 revolutions per minute to radians per second

1 rev/min = 0.10472 rad/s

60 revolutions per minute = 60 rev/min × 0.10472 rad/s/1 rev/min

= 6.28 rad/s

v = 0.1 m × 6.28 rad/s

v = 0.628 m/s

The direction of this velocity is tangential to the circle.

Learn more: brainly.com/question/4612545

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3 years ago