When work is done by the force of gravity, the path that the object takes isn't important. What matters
is the object's change in height, regardless of the path taken to get there. We have already discussed
that when there is a net force on an object, it's kinetic energy changes. We can see that in the
previous example of the brick falling towards the Earth over a distance h. As it falls the net force on it
is F,-mg, and it gains kinetic energy as it falls. Let's consider what must happen before the brick
falls. If the brick starts on the ground, let's assume that someone has to lift it up a distance h before it
falls.
10) If you lift a brick (mass m) up a distance h, what is the minimum force you need to apply to the
brick to lift it up?
11) If you apply that much force to the brick, how much work does your force do on the brick over the
distance h?
12) While lifting the brick, what is the net force acting on the brick?
13) While you are lifting up the brick, the net force on it is zero. Therefore, the net work done on the
brick is zero, and its kinetic energy remains the same. However, your force is still doing work on
the brick. If it's not causing a gain of kinetic energy then what is that work doing?

(a) The wheel's average angular acceleration is 1.076 rad/s².

(b) The angular displacement of the flywheel during this acceleration is 17,455.6 rad.

(c) The torque required to accelerate the flywheel is 35.23 Nm.

The average angular acceleration of the flywheel is calculated as follows;

[tex]\alpha = \frac{\Delta \omega}{t} \\\\\omega_f = 1850\frac{rev}{\min} \times \frac{2\pi \ rad}{1 \ rev} \times \frac{1\min}{60 \ s} = 193.76 \ rad/s\\\\\alpha = \frac{\omega _f - \omega_i}{t} \\\\\alpha = \frac{193.76 -0}{3\min\times 60 \ s} \\\\\alpha = 1.076 \ rad/s^2[/tex]

The angular displacement of the flywheel during this acceleration is calculated as follows;

[tex]\omega_f^2 = \omega_i ^2 + 2\alpha \theta\\\\\omega_f^2 = 0 + 2\alpha \theta\\\\\theta = \frac{\omega_f^2}{2\alpha} \\\\\theta = \frac{(193.76)^2}{2(1.076)} \\\\\theta = 17,445.6 \ rad[/tex]

[tex]I = \frac{1}{2} mr^2\\\\I = \frac{1}{2} \times 155 \times 0.65^2\\\\I = 32.74 \ kgm^2[/tex]

The torque required to accelerate the flywheel is calculated as follows;

[tex]\tau = I \alpha\\\\\tau = 32.74 \times 1.076\\\\\tau = 35.23 \ Nm[/tex]

Learn more about angular acceleration here: https://brainly.com/question/25129606

The volume of the gas is calculated as 1827.87cm^3

Data;

To find the final volume of oxygen, we have to use Boyle's law which states that the volume of a gas is inversely proportional to the pressure of the gas provided that temperature remains constant.

v ∝ 1/p

[tex]v = \frac{k}{p} \\k = pv\\p_1 v_1 = p_2 v_2[/tex]

Let's substitute the values into the equation and solve.

[tex]p_1v_1 = p_2v_2\\101325*300 = 16630 * v_2\\30397500 = 16630v_2\\v_2 = \frac{30397500}{16630} \\v_2 = 1827.87cm^3[/tex]

The volume of the gas is calculated as 1827.87cm^3

Learn more on Boyle's law here;

https://brainly.com/question/26040104

Answer:

A gun whose mass is 0.8kg fires a bullet whose mass is 0.016kg with a velocity of 700m/s, calculate the velocity of the gun recoils.

→ 14m/s

Hope its help

1/80 Hour...................

Answer:

I hope it's help

Explanation:

Brainliest me pls tysm

Answer:

spring force

Explanation:

The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it. An object that compresses or stretches a spring is always acted upon by a force that restores the object to its rest or equilibrium position.

Answer:

  2.38 mW

Explanation:

Power is work per unit time. Work is the product of force and distance. That means ...

  [tex]\text{power}=\dfrac{\text{force}\times\text{distance}}{\text{time}}=\text{force}\times\dfrac{\text{distance}}{\text{time}}\\\\\text{power}=\text{force}\times\text{velocity}[/tex]

Using the given values of force and velocity, the tadpole's power output is ...

  P = (0.028 N)(0.085 m/s) = 0.00238 W = 2.38 mW

The tadpole's power output is about 2.38 mW.

Answer:

-67,500 kgm/s

Explanation:

1300 * 20 + 1100 * (-85) = -67,500 kgm/s

Answer:

        I presume that by O you mean zero.

a = (v2 - v1) / t for uniformly accelerated motion

If v2 = v1 then any velocity is theoretically possible. (with no acceleration)

the relevance of studying physics in relation to mining engineering

Traits are the expression of alleles combination in a genotype, and depend on the inherited alleles and the inheritance pattern. Option D. Jane can say that she and Matt inherited eye color from their mother.  

Traits are the expression of the allelic combination in a genotype. The expressed phenotype will depend on the alleles inherited from each parent and the inheritance pattern.

According to the segregation principle, alleles separate during gamete formation. And during fertilization, two gametes from different parents merge to produce a zygote.

Each gamete carries one of the parental alleles. During fertilization occurs a combination of alleles that will express a phenotype.

Traits inheritance do not depend on each other, they are inherited by separate.

In the exposed example, eye color and hair type expression depend on the combination of the alleles in each genotype. And each trait is independently inherited from the other one.

Available data:

Mother

Father

Jane

Matt

A. Jane and Matt look like their mother ⇒ Only Matt looks like the mother because both of them have brown eyes and curly hair. Jane has brown eyes but straight hair.

B. Only a father can pass on the color of eyes ⇒ Both parents can pass the color of eyes, no only the father.

C. Hair type is not passed down from parent to child ⇒ Hair type is inherited from parents.

D. Jane and Matt inherited eye color from their mother ⇒ Yes, both of them inherited eye color from their mother. The three of them have brown eyes.

Based on her table, Jane can say that she and Matt inherited eye color from their mother. Option D.

You will learn more about trait inheritance at

https://brainly.com/question/12372680

https://brainly.com/question/4520267

https://brainly.com/question/1675246

Answer:

the branch of mechanics concerned with the motion of objects without reference to the forces which cause the motion.

and/or

Kinematics is the study of motion of a system of bodies without directly considering the forces or potential fields affecting the motion. In other words, kinematics examines how the momentum and energy are shared among interacting bodies.

Answer:

ok yellow im new i mean hellow

Answer:

D: Increase the distance between the objects.

E: Decrease the mass of one of the objects.

Answer:

For a thermodynamic system to be in equilibrium, all intensive (temperature, pressure) and extensive thermodynamic properties (U, G, A, H, S, etc) must be constants. Hence, the total change in any of those properties (dℑ ) must be zero at equilibrium.

Explanation:

hope it helps :)

Answer: For a thermodynamic system to be in equilibrium, all intensive (temperature, pressure) and extensive thermodynamic properties (U, G, A, H, S, etc) must be constants. Hence, the total change in any of those properties (dℑ ) must be zero at equilibrium.

Explanation:

The mechanical advantage of the lever is 3 and the right option is A.) 3.

Mechanical advantage can be defined as the ratio of load to effort in a machine.

To calculate the mechanical advantage of the lever, we use the formula below.

Formula

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The mechanical advantage of the lever is 3 and the right option is A.) 3.

Learn more about mechanical advantage here: https://brainly.com/question/19038908

Answer:

Equivalent resistance: 13.589 Ω

Explanation:

R series = R1 + R2 + R3 ...

[tex]\frac{1}{R_{eq} } = \frac{1}{R1} +\frac{1}{R2} +\frac{1}{R3} ...[/tex]

Find the equivalent resistance of the right branch of the circuit:

[tex]R_{eq} = R_{2} +R_{3} \\R_{eq} = 20.7 + 25.8 = 46.5 ohms[/tex]

[tex]\frac{1}{R_{eq} } = \frac{1}{19.2} +\frac{1}{46.5}\\\\\frac{1}{R_{eq} } = 0.0735887097\\\\R_{eq} = 13.5890411[/tex]

Answer: Can't see the graph clearly.

The percentage of the initial potential energy that has been converted into heat is 18.07%.

Potential energy can be defined as the energy of a body due to its position in the gravitational field.

To calculate the percentage of the initial potential energy that has been converted into heat, we use the formula below.

Formula:

Where:

But,

From the diagram,

Substitute these values above into equation 2

Also From the diagram,

Substitute these values into equation 1

Hence, the percentage of the initial potential energy that has been converted into heat is 18.07%.

Learn more about Potential energy here: https://brainly.com/question/1242059

The initial velocity of the train  is 12.56 m/s.

The initial velocity of the train can be determined by using the first kinematic equation as shown below;

v = u + at

u = v - at

where;

u = 30.56 - (36 x 0.5)

u = 12.56 m/s

Thus, the initial velocity of the train  is 12.56 m/s.

Learn more about initial velocity here: https://brainly.com/question/19365526

Why do metals conduct electricity?

A. The electrons in metals are inside the nuclei of the atoms.

B. All covalent bonds conduct electricity.

C. A lattice of ions allows valence electrons to move easily. ✓

D. Metals never give up electrons.

Answer:

The answer is for your question is :

Explanation:

True

If the electrical resistance of a household appliance becomes four times larger than the original value, AND the voltage at the outlet doesn't change, then the appliance starts to use 1/4 of the original current.

I  =  E / R

Answer:

photosynthesis is the process where by plants/green plants make their own food

Answer:

200 m/^2

Explanation:

Fnet =ma

100 =(0.5)(a)

100÷0.5= 0.5a ÷ 0.5 (divide both sides by 0.5)

200 m/s^2= a

Answer:

School labs are a great place for students which help them enhance their learning by understanding the theoretical concepts of science which are taught in classrooms. Well-designed laboratories not only make science experiments fun but also help students in achieving good academic results.

Explanation:

hope this helps :)