In the data table , distance is measured in meters and time is in seconds. Calculate the mans average velocity using the equation (average velocity= total distance/total time.

Answer:

416.667 m/s

Explanation:

divide the distance by the time

Answer:

Explanation:

Pecan 1 and 4 seem the best answer

Answer:

1176N

Explanation:

Given parameters:

Mass of bench  = 100kg

Forward force  = 980N

Coefficient of static friction = 0.2

Acceleration  = 1.84m/s²

Unknown:

Magnitude of the applied force  =?

Solution:

Frictional force is a force that opposes motion, for a body to move, the applied force must be greater than the frictional force;

The Force applied;

  Force applied  = Frictional force + Weight of the body

   Frictional force  = umg

     u is the coefficient of static friction

      m is the mass

        g is the acceleration due to gravity

    Force applied  = 0.2 x 100 x 9.8 + 980 = 1176N

Answer:

See the answers below.

Explanation:

1

The data of 100W means power, and the other data of 220V means voltage, that is to say that bulb serves to work at a voltage of 220V100W datum means power.

J means work that is given in Joules [J], we must remember that power is defined as the relationship between work at a certain time, therefore we can determine work by means of the following expression.

[tex]P=W/t\\[/tex]

where:

P = power [Watt]

W = work [J]

t = time [s]

[tex]W=P*t\\W=100*5[hr]*[\frac{3600s}{1hr} ]\\W=1800000[J] = 1.8[MJ][/tex]

Now the electric cost.

[tex]0.1[kW]*5[hr]*55\frac{LL}{1kwhr} =27.5[LL][/tex]

2

We know that power is defined as the product of voltage by resistance.

[tex]P=V*I[/tex]

where:

P = power [W]

V = voltage [V]

I = current [amp]

[tex]I=P/V\\I=1500/220\\I=6.82[amp][/tex]

3

The voltage can be calculated by means of ohm's law, which tells us that the voltage is equal to the product of resistance by the current.

[tex]V =I*R[/tex]

where:

V = voltage [V]

I = current = 20 [mA] = 0.02 [A]

R = resistance = 20 [kΩ] = 20000 [Ω]

Now replacing:

[tex]V = 0.02*20000\\V = 400 [V][/tex]

4

According to the figure we see that when the current is equal to 10 [mA] the voltage is equal to 1 [V]. With these two values, we can use ohm's law and find the value for the resistance.

[tex]V = I*R\\R = V/I\\R = 1/0.01\\R =100 [ohm][/tex]

Answer:

A. 2.58m

Explanation:

Using the formula;

F = GMm/r²

M and  m are the masses

G is the gravitational constant

r is the distance between the masses

Substitute

0.00006 = 6.67*10^-11(2000)(3000)/r²

0.00006r² = 6.67*10^-11*6000000

0.00006r² = 40.02*10^-5

0.00006r² = 0.0004

r² =  0.0004/0.00006

r² = 6.66

r = 2.58m

Hence the distance between them is 2.58m

Answer:

Reflection

Explanation:

Reflection is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the reflection of light, sound, and water waves.

Answer:

d

Explanation:

Ribosomes, endoplasmic reticulum, vesicles, and the Golgi apparatus are the organelles present in the eukaryotic cell. They are involved in various roles and functions involving proteins.

Ribosomes are the organelles involved in the transcription and translation process to synthesize proteins and transport them from ER to the vesicles. The endoplasmic reticulum (ER) is a membraneous structure that along with ribosomes is involved in lipid and protein synthesis.

The proteins synthesized from ER are transported to the Golgi body through the vesicles. They even eliminate the waste from the cell. The Golgi apparatus receives proteins from ER and then packs, modifies, and transports them to the target location.

Therefore, the ER, ribosomes, Golgi, and vesicles are involved in protein synthesis and transportation.

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Answer:

Vr = 20 [km/h]

Explanation:

In order to solve this problem, we have to add the relative velocities. We must remember that velocity is a vector, therefore it has magnitude and direction. We will take the sea as the reference measurement level.

Let's take the direction of the ship as positive. Therefore the boy moves in the opposite direction (Negative) to the reference level (the sea).

[tex]V_{r}=30-10\\V_{r}=20 [km/h][/tex]

Answer:

Tension, Ft = 79.91 N

Explanation:

The tension in the string is the resultant force that exists in the string due to the centripetal effect of the swinging ball.

From conservation laws, the tension in the string will be equals to the centripetal force acting on the string.

The tension in a string can be obtained using the formula:

[tex]T=mv^2/R[/tex]

where v = linear velocity of the metal ball which equals to the angular velocity of the ball X the radius of the ball.

The radius of the ball is given as 72 cm = 0.72m and the angular velocity = 1.02 rad/second.

Therefore, linear velocity, [tex]v = 2\pi \times 1.02\times 0.72 =4.616m/s[/tex]

The tension in the string will now be equals to [tex]2.7 \times 4.616^2 /0.72 =79.91N[/tex]

Answer:as per as Newtons second law, The forces exerted on the rope create tension.

As such,The tension is equal to the applied force.The tension is trasmitted to the opposite side and of the rope delivering the applied force.

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Answer:

Force = 35 N

Explanation:

From Newton's third law of motion, the boy must apply a force greater than the weight of the sled to lift it.

weight of sled = mg

where m is its mass and g the force of gravity on it.

weight of sled = 50 N

Force applied by the boy on the sled = 15 N

Since the force applied on the sled by the boy is lesser than the weight of the sled, then;

Force that the sled exerts on the student = 50 - 15

                                             = 35 N

The force exerted by the sled on the student is 35 N.

Answer:

Since cell division occurs twice during meiosis, one starting cell can produce four gametes (eggs or sperm). In each round of division, cells go through four stages: prophase, metaphase, anaphase, and telophase.

Answer:

here are six stages within each of the divisions, namely prophase, prometaphase, metaphase, anaphase, telophase and cytokinesis

Explanation:

Answer:

The applied force to accelerate the crate is 374.4 N

Explanation:

Given;

mass of the crate, m = 120 kg

magnitude of force due to friction, Fk = 74.4N

acceleration of the crate, a = 2.5 m/s²

The net horizontal force on the crate is calculated as;

∑Fx = F - Fk

ma = F - Fk

F = ma + Fk

where;

F is the applied force to accelerate the crate by 2.5 m/s²

F = (120 x 2.5) + (74.4 N)

F = 300 N + 74.4 N

F = 374.4 N

Therefore, the applied force to accelerate the crate is 374.4 N

Answer:

With more particles there will be more collisions and so a greater pressure. The number of particles is proportional to pressure, if the volume of the container and the temperature remain constant. ... This happens when the temperature is increased.

Explanation:

Assuming the gas to be an ideal gas, the temperature will increase at the same rate as the pressure increases.

Let us assume that the gas in the container is an ideal gas. Then from the ideal gas equation, we get that:

PV = nRT

where P is the pressure of the gas

V is the volume

T is the temperature

n is the number of moles of the gas

R  is the universal gas constant

Now, it is given that V is constant, R is already a constant, and n will also be constant, since the number of moles of gas in the container is not changing, so:

P = nRT/V

P = constant × T

P/T = constant

This means that the temperature will increase at the same rate as the pressure increases.

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Answer:

Answer:

kinetic and potential energy). The opposite is true when you remove thermal energy: Particles move slower (less kinetic energy). Particles get closer together (less potential energy)

Answer:

Explanation:

kinetic and potential energy). The opposite is true when you remove thermal energy: Particles move slower (less kinetic energy). Particles get closer together (less potential energy).

Does this make sense??-

Answer:

1 work is scalar quantity

2 it si unit of work is joule

3The equation of caculate is work= Force× Displacement

1 power is scalar quantity

2 it si unit of power is watt

3 the equation of calculateis power= work \time

Answer:

1.55m

Explanation:

The formula for calculating the maximum height is expressed as;

H = u²/2g

u is the initial velocity

g is the acceleration due to gravity

Substitute

H = 1²/2(9.8)

H = 1/19.6

H = 0.051m

Since it is launched form a height of 1.5m, the height above the ground will be 1.5+0.051 = 1.55m

Answer:

Height of cliff(h) = 80 meter (Approx)

Explanation:

Given:

Time taken t = 4 sec

Gravitational acceleration = 10 m/s (Approx)

Find:

Height of cliff(h)

Computation:

h = ut + 1/2(g)(t)²

Height of cliff(h) = (0)(4) + 1/2(10)(4)²

Height of cliff(h) = 80 meter (Approx)

Answer:

9.95 percent

Explanation:

To get the percentage error, we use the following formula:

Percentage error = (expected output- actual output)/expected output  X 100

Where

expected output: This is the mass of the end product after the chemical reaction that was expected = 171.9g

actual output: This is the mass of the end product after the chemical reaction that was observed = 154.8 g

Percentage error = [tex]\frac{171.9-154.8}{171.9} X 100= 9.95 percent[/tex]

Therefore the percentage error in the experiment is 9.95 percent.

The percent error for this experiment in which the reaction takes place to yield 171.9 g of product is 9.95%.

The difference between the measured or calculated value during the experiment or calculating and the known value is called the error. The percentage of error is the 100 times of this difference when divided with known value.

The expected value of the reaction to yield is 171.9 g of product. The experimental value of the reaction to yields is 154.8 g of product.  

Thus, the percent error for this experiment

[tex]P=\left(\dfrac{171.9-154.8}{171.9}\right)\times100\\P=9.95\%[/tex]

Thus, the percent error for this experiment in which the reaction takes place to yield 171.9 g of product is 9.95%.

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Alpha Centauri A

The two main stars are Alpha Centauri A and Alpha Centauri B, which form a binary pair. They are an average of 4.3 light-years from Earth. The third star is Proxima Centauri. It is about 4.22 light-years from Earth and is the closest star other than the sun

Have a nice Day , Hope this helped you I would appreciate it if you could mark my answer brainliest

Answer:

The answer is A

Answer:

D) Medical School

Explanation:

Edge 2021

Answer:

For Bill to dump the water on Tim, Tim should be 7.232 meters from the tree when Bill dumps the water

Explanation:

The given height above the ground at which Bill sits on the tree branch with a bucket of water, h = 4.0 meters

The speed with which Tim is approaching the tree = 8.0 meters per second

The time , t, it will take for the bucket of water to reach the ground is given by the equation of free fall as follows;

h = 1/2·g·t²

Where;

h = Height = 4.0 m

g = The acceleration due to gravity ≈ 9.8 m/s²

t = The time

Making t the subject of the above equation gives;

t = √(h/(1/2·g))

Substituting the known values gives;

t = √(4.0 m/(1/2 × 9.8 m/s²)) ≈ 0.904 s

t ≈ 0.904 seconds

Therefore, for Bill to dump the water on Tim, it should take Tim approximately 0.904 seconds to get to the tree

The distance, d, Tim will be when it will take him 0.904 seconds to get to the tree is given from the kinematic equation of speed, s, as follows;

Distance, d = Time, t × Speed, s

Where;

d = The distance

t = The time = 0.904 s

s = The speed with which Tim is approaching the tree = 8.0 m/s

Substituting the values gives;

d = 0.904 s × 8.0 m/s = 7.232 m

Therefore, the distance Tim should be when Bill throws the water = 7.232 meters

by the formula

s=d/t

speed=distance/time

the bigger the distance that has been traveled over a period of time the bigger the speed

Speed = Distance / Time

If time is held constant, then speed is directly proportional to distance. If distance is held constant and time varies, then the speed is inversely proportional to the time taken.

Explanation:

sorry but Oz is the option or anything else can clarify

Engineers have developed solar energy technology that reduces the need for other sources of energy that can pollute the atmosphere. So, option C.

Solar energy is defined as the solar radiation that has the potential to ignite chemical processes, produce heat, or generate electricity.

Here,

In order to protect wildlife, and ecosystems, it is imperative that greenhouse gas emissions are reduced and climate change is mitigated. Solar energy plays a significant part in this as a renewable source of energy.

Additionally, solar energy can reduce water use in energy production and enhance air quality.

An extremely crucial factor considering the scarcity of water is that solar energy does not produce waste or contaminate water. Wind energy is essential for preserving hydrological resources because it consumes among the least amounts of water compared to fossil fuels and nuclear power facilities.

Hence,

Engineers have developed solar energy technology that reduces the need for other sources of energy that can pollute the atmosphere. So, option C.

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Answer:

20m/s²

Explanation:

Given parameters:

Force  = 10000N

Mass  = 500kg

Unknown:

Acceleration  = ?

Solution:

According to Newton's second law of motion:

     Force  = mass x acceleration

Mass is the amount of matter in a substance

Acceleration is the rate of change of velocity with time

 Now insert the parameters and solve;

           10000 = 500 x acceleration

            Acceleration  = 20m/s²

The ball accelerates from rest to 75.0 m/s in a matter of 0.020 s, so the drive applies an (average) acceleration of

a = (75.0 m/s - 0) / (0.020 s) = 3750 m/s²

Assuming this acceleration was constant, then the net force F on the ball is

F = (0.050 kg) (3750 m/s²) = 187.5 N ≈ 190 N