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Answer:

20N

Explanation:

Given parameters:

Mass of the block  = 4kg

Acceleration  = 5m/s²

The speed of the block after the student pushes it is 10m/s.

Given the data in the question;

Since the block is initially at rest,

Final velocity; [tex]v =\ ?[/tex]

To determine the final velocity; we use the First Equation of Motion:[tex]v = u + at[/tex]

Where v is final velocity, u is initial velocity, a is acceleration and t is time taken.

We substitute our values into the equation

[tex]v = 0 + [ 2m/s^2\ *\ 5s]\\\\v = 2m/s^2\ *\ 5s\\\\v = 10\frac{ms}{s^2}\\\\v = 10m/s[/tex]

Therefore, the speed of the block after the student pushes it is 10m/s.

Learn more: https://brainly.com/question/10477202

Answer:

Acceleration = 5m/s² Southeast

Explanation:

Given the following data;

Final velocity = 10 m/s

Time = 2secs

To find acceleration;

In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

[tex]Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}[/tex]

[tex]a = \frac{v - u}{t}[/tex]

Where,

a is acceleration measured in [tex]ms^{-2}[/tex]

v and u is final and initial velocity respectively, measured in [tex]ms^{-1}[/tex]

t is time measured in seconds.

We know that Initial velocity = 0m/s

Substituting into the equation, we have;

[tex]a = \frac{10 - 0}{2}[/tex]

[tex]a = \frac{10}{2}[/tex]

Acceleration = 5m/s² Southeast.

Answer:

Rough surfaces have more microscopic hills and valleys than smooth surfaces do. So, the rougher the surface is, the greater the friction is.

Answer:

0.14Hz

Explanation:

Given parameters:

Velocity  = 27.9m/s

Wavelength  = 200m

Unknown:

Frequency of the waves = ?

Solution:

To solve this problem, we use the wave - velocity equation:

          V  = F ∧  

V is the velocity

F is the frequency

∧ is the wavelength

 Now, let us insert the parameters and solve;

So;

              27. 9  = F x 200

                  F  = 0.14Hz

Answer:

After refraction at two parallel faces of a glass slab, a ray of light emerges in a direction parallel to the direction of incidence of white light on the slab. As rays of all colours emerge in the same direction (of incidence of white light), hence there is no dispersion, but only lateral displacement.

Answer:

Materials can be classified based on the amount of light they transmit. Materials, which allow complete transmission of light, are called transparent. Any object can be seen through a transparent material. One example of transparent material is pure glass.

Explanation:

Does this help ?

Answer:

light, materials, and shadows

Explanation:

hope this helps have a good rest of your day :) sorry if incorrect

Answer:

Cytokinesis occurs differently in animal and plant cells. In animal cells, the plasma membrane of the parent cell pinches inward along the cell's equator until two daughter cells form. In plant cells, a cell plate forms along the equator of the parent cell.

Explanation:

Answer:

D. 0.60 um

Explanation:

Given the following data;

Frequency = 5.0x10^14 Hz

Speed = 3 x 10^8 m/s

To find the wavelength;

Wavelength = speed/frequency

Substituting into the equation, we have

Wavelength = 3 x 10^8/5.0x10^14

Wavelength = 6 × 10^7m

But 1 meter (m) = 1000000 micrometer (um)

6 × 10^7 meter = 0.6 micrometer.

Answer: A

Explanation:

Location A represents the Caribbean region which is known for tourist attractions such as nice beaches. It is also known however, for devastating hurricanes.

Apart from mostly being islands, which puts them at risk of being in Hurricane paths, the Caribbean is warm and the air is moist. Hurricanes derive energy from these two things which is why Hurricanes attack the Caribbean rather frequently.

Answer:

Based off the picture the guy above showed me, the correct answer would be A

However, if you have a different map, choose the choice nearest to a body of water.

Explanation:

Catastrophism is a geological concept or ideology that was formerly in place. It suggests that the earth crust has evolved through only drastic and violent geological events.

Uniformitarianism suggests that the earth carefully evolved over a period of time and that the processes that are occurring today have occurred in times past.

Answer:

W = 9.8 J

Explanation:

Given that,

Mass of the book, m = 2kg

A student lifts it from the floor to a desk that is 0.5 meters high.

We need to find work done by the student. The work done in lifting the book is given by :

W = mgh

Put all the values,

W = 2 kg × 9.8 m/s² × 0.5 m

W = 9.8 J

So, the required work done is 9.8 J.

Answer:

Rita runs faster

Explanation:

To obtain the answer to the question given, we determine the speed of Rita. This can be obtained as follow:

Distance = 1.6 km

Time = 15 mins

Speed =?

Next, we shall convert 15 mins to hour. This can be obtained as follow:

60 mins = 1 h

Therefore,

15 mins = 15 mins × 1 h / 60 mins

15 mins = 0.25 h

Thus, 15 mins is equivalent to 0.25 h.

Finally, we shall determine speed of Rita as follow:

Distance = 1.6 km

Time = 0.25 h

Speed =?

Speed = distance / time

Speed = 1.6 / 0.25

Speed = 6.4 Km/h

Thus Rita's speed is 6.4 Km/h

Comparing the speed of Rahul and Rita

Rahul's speed = 4.5 km/h

Rita's speed = 6.4 Km/h

We can see that Rita's speed is greater than Rahul's speed. This simply indicates that Rita runs faster than Rahul.

Answer:

When water freezes to form ice, the molecules would be vibrating in place rather than moving round. It is a result of a decrease in the kinetic energy of the molecules of water. It is said that the temperature and the kinetic energy of the molecules is directly proportional which means that when temperature is increased, the kinetic energy of the molecules would increase as well making the molecules move around. However for this case, when we day the system is cooled then it means the temperature is decreased which would result to the decrease of the kinetic energy of the molecules.

Answer:

the buckets mass is 346g if im not mistaken

Explanation:

Mass of the bucket is 1.48kg

Centripetal force f=25N

Radius r=1.2m

speed v=4.5m/s

By the formula of centripetal force,

Centripetal force = mass x velocity2 / radius on putting the values

25= {m*4.5*4.5}{1.2}

m={250*12}{45*45}

  ={40}{27}

  =1.48kg

The mass of the bucket is 1.48kg.

"The force acting on a body that moves in a circular path is called centripetal force. It acts towards the center of the circle."

Know more about centripetal force here

https://brainly.com/question/11324711

#SPJ2

Explanation:

Because acceleration is velocity in m/s divided by time in s, the SI units for acceleration are m/s2, meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second. ... The quicker you turn, the greater the acceleration.

Answer:

C. the Curvature effect

Explanation:

The Coriolis effect is the apparent curvature of global winds, ocean currents, and everything else that moves freely across the Earth's surface. The curvature is due to the rotation of the Earth on its axis

Answer:

In physics, equations of motion are equations that describe the behavior of a physical system in terms of its motion as a function of time.[1] More specifically, the equations of motion describe the behaviour of a physical system as a set of mathematical functions in terms of dynamic variables. These variables are usually spatial coordinates and time, but may include momentum components. The most general choice are generalized coordinates which can be any convenient variables characteristic of the physical system.[2] The functions are defined in a Euclidean space in classical mechanics, but are replaced by curved spaces in relativity. If the dynamics of a system is known, the equations are the solutions for the differential equations describing the motion of the dynamics.

When acceleration is constant and motion is a straight line. The three equations of motion r

Answer:

physical property

Explanation: Some substances exist as gases at room temperature (oxygen and carbon dioxide), while others, like water and mercury metal, exist as liquids.

Answer:

d

Explanation:

Answer:

D. A snowball grows as more snow sticks to it.

Explanation:

When a star is born, it’s fairly small. However, the stars gravitational pull brings more things (for lack of better term) into it therefore increases it’s size as a snowball would as more things (again, no better term) stick to it.

Hope this helps, it was a pleasure to make your acquaintance.

Answer:

The Pendulum falls but the longer the period or the back and forth swing the greater amplitude the oscillation depends on the amplitude

Explanation:

Answer:

5 km

0

Explanation:

The question says the truck travelled to and fro from the stone quarry.

When going to the stone quarry, the distance was 2.5 km to the east.

On returning, the distance back is also 2.5km

Therefore total distance travelled is 2.5km + 2.5km

= 5km

The displacement 8s dependent on what is the initial and also the final position. The initial and the final position are one and the same thing. Because the truck starts and goes back to the same position, the displacement is zero.

Explanation:

Here,

Mass=16,500kg.

speed=14 m/s.

we know that,

[tex]\tt{ p=m×v }[/tex] ⠀

where,

p=momentum

m=mass

v=velocity

according to the question,

[tex]\tt{ momentum =mass×velocity }[/tex] ⠀

[tex]\tt{ 16500×14 }[/tex] ⠀

[tex]\tt{ 231000~kg.m/s }[/tex] ⠀

so,

velocity of the car is 231000kg.m/s

Answer:

Babylonia was an ancient Akkadian-speaking state and cultural area based in central-southern Mesopotamia. A small Amorite-ruled state emerged in 1894 BCE, which contained the minor administrative town of Babylon.

Explanation:

Answer: He is usining

Gravity,Drag, Tension, Direction

Explanation: please give me brainliest

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 225 × 13

We have the final answer as

Hope this helps you

Answer:

push and pull

Explanation:

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Answer: Gravity for sure and...air resistance.

Explanation: I hope this is correct.

Answer:

Educational institutions can influence what psychological perspectives are taught, studied, and researched. Take, for example, behaviorism. Before the cognitive perspective re-emerged, behaviorism was the dominant perspective being taught in most universities. Personal ideology can also affect which perspective a psychologist supports, the course of research a psychologist undertakes, and also a psychologist's perception and interpretation of research findings. For example, during the dominance of behaviorism, psychologists were discouraged from studying cognitive processes. As a result, much of the research conducted had a behaviorist slant to it.

Explanation: