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Answer:

Potential energy = 13.23 J

Explanation:

Given that,

The mass of the loaded cart, m = 3 kg

Its height of the seat top is 0.45 m

We need to find the potential energy of the loaded cart on top of the ramp. We know that, the potential energy of an object is due to its height. It can be given by the formula as follows :

[tex]E=mgh\\\\E=3\ kg\times 9.8\ m/s^2\times 0.45\ m\\\\E=13.23\ J[/tex]

So, the required potential energy is 13.23 J.

Answer:

3360m

Explanation:

Given parameters:

  Average velocity of Marta = 4.2m/s

  Time taken for biking  = 800s

Unknown:

Distance traveled  =?

Solution:

Velocity is the rate of change of displacement with time.

  Displacement  = velocity x time

Input the parameters and solve;

 Displacement  = 4.2 x 800 = 3360m

Answer:

b

Explanation:

Answer:

Explanation:

Hey there!!!, there are no attached files/graphs to this question, but we can find our way and solve for the gravitational force acting on the mass

Step one:

given data

mass= 10kg

acceleration due to gravity= 9.81m/s^2

Step two:

The expression for the gravitation force is given as

Gravitational force F=mass * acceleration due to gravity

Fg=ma

substituting we have

Fg=10*9.81

Fg=98.1N

The force due to gravity exerted on the object is most nearly 100N

Answer:

use newtons gravity of law by launching a watermelon in frot of the wagon

Explanation:

Answer:

According to formula of power N = A/t   Given by : N = 125 W and A = 825 J.

Here, N --- power ; A --- work ; t --- time.

Now, we can find the time t = A/N = 6.6 s

Explanation:

Answer:

The average velocity is -7.675 m/s

Explanation:

Given;

initial velocity, u = 0 m/s

final velocity, v = -15.35 m/s

Based on the follow up state " In general, to find the average of any 2 things, you add them together and divide by how many things there are", the average velocity will be calculate as ;

Sum of the velocities = 0 m/s + (-15.35 m/s) = -15.35 m/s

Number of velocites = 2

AVERAGE VELOCITY = (-15.35 m/s) / (2)

AVERAGE VELOCITY = -7.675 m/s

Answer:

The roof of the house is 8.67 m high

Explanation:

Horizontal Motion

When an object is thrown horizontally with a speed v from a height h, the range or maximum horizontal distance traveled by the object can be calculated as follows:

[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]

The boy is on the roof of his house and throws a rock horizontally at v=11.5 m/s. It lands on the ground d=15.3 m from the base of the house. We can use the above equation to find the height of the roof by solving it by h:

[tex]\displaystyle h=\frac{gd^2}{2v^2}[/tex]

Substituting values:

[tex]\displaystyle h=\frac{9.8\cdot 15.3^2}{2\cdot 11.5^2}[/tex]

h=8.67 m

The roof of the house is 8.67 m high

Answer:

e=75%=0.75 work output = usful work=240j

Explanation:

Answer:

18900J

Explanation:

energy = Temperature change * Mass * Specific Heat Capacity

3*1.5*4200=18900

=18900J

Answer:

Explanation:

                   Q = mcT

where,

          Q is heat(energy)

          m is mass

           c is specific heat capacity

           T is change in temperature

so,

      Q= 1.5kg x 4200 J/kg.C x 3C

       Q = 18900J of energy

Answer:

0.4 m/s²

Explanation:

Use Newton's second law.

∑F = ma

120,000 N = (300,000 kg) a

a = 0.4 m/s²

Answer:

1. Chemistry- the study of the structure, properties, and interactions of materials and the changes they undergo.

2. Physics- the study of matter and energy and how they interact.

3. Science- the systematic study and analysis of facts.

4. Scientific method- a process to test a proposed solution to a problem.

Explanation:

1. Chemistry is a branch of science that deals with the study of the structures, properties, and interactions of various materials with other materials. It also includes the study of such changes that may occur during such interactions.

2. Physics is also one branch of science that deals with the study of matter and energy. Contrary to chemistry, this scientific branch deals with the interaction of matter and energy, their motion, and behavior especially related to space and time.

3. Science is the systemic study and analysis of facts. It is the understanding of the natural and scientific world, dealing with the elements of how and why things work.

4. Scientific method is the method or process by which tests are made to ascertain problems and find a solution for such. It is the method of getting knowledge and solutions, the experimentation to get to a conclusive result.

Answer:

the weight becomes thicker and harder to carry as the weight plottens,

Explanation:

i did this

Answer:

Explanation:

The location of the target can be determined by calculating the horizontal distance according to the projectile formula

R = U*√2H/g

U is the initial speed = 20m/s

H is the maximum height = 14m

g is the acceleration due to gravity = 9.81m/s²

Substitute

R = 20*√2(14)/9.81

R = 20√28/9.81

R = 20√2.85

R = 20(1.689)

R = 33.79m

Hence the location of the target is at 33.79m

Answer:

12,349 deers

Explanation:

Present population size of deer = 11,650

Expected percentage increase in population size by next year = 6%

6% of 11,650 = 6/100 x 11,650

                         = 699

Adding this to the present population: 11,650 + 699 = 12,349.

Hence, the total number of deer expected to be living in the population a year from now (that is, next year) is 12,349 deers.

Answer:

1.) 17.3 m/s

2.) 1.8 s

Explanation:

Given that While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 6.25 m/s.

The maximum height will be calculated by using third equation of motion

At maximum height, V = 0

V^2 = U^2 - 2gH

0 = 6.25^2 - 2 × 9.8 × H

39.06 = 19.6H

H = 39.06 / 19.6

H = 1.993m

The stone subsequently falls to the ground, which is 13.3 m below the point where the stone leaves your hand. At what speed does the stone impact the ground?

Using the same formula again.

Where the height = 13.3 + 1.993

Height = 15.29m

Substitutes the height into the third equation of motion

V^2 = U^2 + 2gH

U = 0

V^2 = 0 + 2 × 9.8 × 15.29

V^2 = 299.74

V = sqrt ( 299.74 )

V = 17.3 m/s

How much time is the stone in the air? Ignore air resistance and take g = 9.8 m/s2.

Using the second equation of motion formula

H = Ut + 1/2gt^2

U = 0

15.29 = 1/2 × 9.8 × t^2

15.29 = 4.9t^2

t^2 = 15.29 / 4.9

t^2 = 3.120

t = sqrt ( 3.120 )

t = 1.766 s

Therefore, the stone is on air for 1.8s approximately.

Answer:

846.7Pa

Explanation:

Given parameters:

Force  = 635N

Area = 0.75m²

Unknown:

Pressure  = ?

Solution:

Pressure is the force per unit area on a body.

   Pressure  = [tex]\frac{Force}{Area}[/tex]

Insert the parameters and solve;

  Pressure = [tex]\frac{635}{0.75}[/tex]   = 846.7Pa

Answer: 2.6

Explanation: Just trust me...

Answer:

there is no image

Explanation:

Controllable risk factors that Brenda'a father may have had include dietary choices, amount of exercise, sleep schedule, among other things.

The controllable risk factors for heart disease that Brenda’s father has include stress, smoking, high blood pressure, etc.

Blood pressure is a risk factor for heart disease. High blood pressure increases the risk of heart disease.

Another risk factor is smoking. It is advisable for people not to smoke in order to avoid having diseases. If one smokes, there's a higher chance that the person will have heart disease.

In conclusion, it's also important for one to rest very well and not stress himself or herself.

Read related link on:

https://brainly.com/question/22909359

Answer:

0.4Hz

Explanation:

Given parameters:

   Number of waves  = 10.9waves

   Time taken  = 28s

Unknown:

Frequency of water waves = ?

Solution:

The frequency of a wave is the number of waves that passes through a point per unit of time.

  Frequency  = [tex]\frac{number of waves }{time}[/tex]

  Insert parameters and solve;

         Frequency  = [tex]\frac{10.9}{28}[/tex]   = 0.4Hz

Answer:

The correct option is;

c. A set of magnets are placed in an electric field. As the current increases or decreases, the strength of the electric field changes, causing the magnet to be more or less moved by the field

Explanation:

A permanent magnet motor is an electric motor that utilizes permanent magnets combined with a coil of electric wire winding rather than there being only the the electric wire windings in the motor

The principle of operation of a permanent magnet motor involves the rotation of a magnetic rotor by the electromagnetic force generated from the outer stator coil when power is supplied to the stator windings from an external source.

Answer:

Higher temperature makes an object less dense 2. Density governs the state of matter for the object, hence as water becomes less and less dense, it becomes gas (water vapour) 3. Higher temperature makes an object has more pressure, hotter gas has higher pressure.

Explanation:

Relation Between Density and Temperature Temperature is the measure of heat. Density is the measure of how closely any given entity is packed or it is the ratio of the mass of the entity to its volume.

I hope this works

Answer:

Depending on how much is taken and the physical condition of the individual, alcohol can cause:

-Slurred speech.

-Drowsiness.

-Vomiting.

-Diarrhea.

-Upset stomach.

-Headaches.

-Breathing difficulties.

-Distorted vision and hearing.

Explanation:

Answer:

F = 64 N

Explanation:

Given that,

Mass of the shopping cart, m = 8 kg

Initial speed of the shopping cart, u = 0

Final speed of the shopping cart, v = 4 m/s

Time, t = 0.5 s

We need to find the magnitude of the force that causes the shopping cart to accelerate. The force is given by the formula as follows :

[tex]F=ma\\\\F=\dfrac{m(v-u)}{t}\\\\F=\dfrac{8\times (4-0)}{0.5}\\\\F=64\ N[/tex]

So, the magnitude of force is 64 N.

Answer:

Explanation:

Power is expressed as P = Force * Distance/time

From the formula given, the following parameters is needed to calculate power

1) Work done

2) force

3) Distance

4) Time

From the question, the given data is incomplete. We are supposed to be given the time taken to moved the chair over the distance. with the time we can easily calculate the power used up by the student.

Answer:

Alkali metals are reactive, soft metals with low densities. Noble gases are all unreactive non-metals

Explanation: