A man pulled a food cart 4. 5 m to the right for 15 seconds. What is the average speed of the food cart to the nearest tenth of a m/s

Since the displacement is equal to zero, the velocity from 30 to 40s will also be zero.

Velocity is the distance travelled by a body in a specific direction per time taken. It is measured in meter per second. That is, m/s

Given that a car started its journey at point A. After 30 seconds, the car had reached point B. The car stops at point B for 10 seconds. Then, the car turned around and arrived at point A after 15 seconds. The car stopped at point A for 20 seconds. The car then went on his way and get to the point C after 10 seconds.

To find the velocity from 30 to 40s, we must realize that velocity can also be defined as;

Velocity = displacement / time

The displacement from point A to B and back to A is equal to zero.

Therefore, The velocity from 30 to 40s is also zero.

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In free fall on Earth, neglecting the effects of air resistance, the net external force on an object is equal to its weight.

This is because the only force acting on the object is the force of gravity. According to Newton's second law of motion, the net force (F_net) acting on an object is equal to its mass (m) multiplied by its acceleration (a).

In this case, the acceleration is the acceleration due to gravity (g) which is approximately 9.8 m/s² on Earth.

Therefore, the net external force is given by the equation F_net = m * g. As the object falls freely, its weight acts as the net external force pulling it downward.

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The recoil velocity of the projectile launcher of mass 4 kg is 0.75 m/s, and the collision is inelastic.

Velocity is the directional speed of a moving object as an indication of its rate of change in position as observed from a specific frame of reference and measured by a specific time standard. The concept of velocity is fundamental in kinematics, the branch of classical mechanics that describes the motion of bodies.

To calculate the recoil velocity of the launcher, we use the formula below:-

v = mV/M

Where,

v = Recoil velocity

m = Mass of the projectile

M = Mass of the launcher

V = Velocity of the projectile after the launcher was fired

From the question,

Given:

m = 0.010 kg

M = 4 kg

V = 300 m/s

Substituting these values in the formula,

v = 0.01×300/4

v = 0.75 m/s

Therefore, the recoil velocity is 0.75 m/s, and the collision is inelastic.

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If Cora draws a model of an atom with two protons, four neutrons and two electrons, it will look like this; a green cloud with 1 concentric white line that surrounds the center, with2 small green balls marked with minus signs. At the center of her model, she will draw 4 unmarked red balls interspersed with 2 blue balls marked with plus signs.

The options to your question seems clustered, but if separated, I'm sure this is what it would look like;

A.) at the center, 2 unmarked red balls are interspersed with 4 blue balls marked  with plus signs.

B.)a green cloud with 1 concentric white line surrounds the center, with 2 small green balls marked with minus signs on the white line. at the center, 4 unmarked red balls are interspersed with 2 blue balls marked with plus signs

C.)a green cloud with 1 white line surrounds the center, with 2 small green balls marked with minus signs on the white line. at the center, 2 unmarked red balls are interspersed with 2 blue balls marked with plus signs.

D.) a green cloud with 1 white line surrounds the center, with 4 small green balls marked with minus signs on the white line. at the center, 4 unmarked red balls are interspersed with 2 blue balls marked with plus signs.

E.)a green cloud with 1 white line surrounds the center, with 4 small green balls marked with minus signs on the white line.

When arranged like this, the answer to the question will be option B. The green cloud represents the nucleus of the model atom. The white line that surrounds the green cloud ( nucleus ) represents the orbit or shell. Therefore, the small green balls marked with minus signs are the electrons, as they are negatively charged and are found on the orbit/shell of an atom.

The unmarked red ball at the center of the model represents the neutron. Neutrons have no charge which is shown by the red balls not being marked by any sign.  The blue balls marked with a plus sign are the protons since they are positively charged.

The atom Cora wants to draw contains two protons, four neutrons and two electrons, therefore her model will contain 2 small green balls marked with minus sign as the electrons, 4 unmarked red balls as the neutrons and 2 blue balls with a plus sign as the protons. Hence the answer is option B.

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Parallel information system is when an old information system in shut down and a new system starts up right after the shut down.

An information system is a system in which information are passed or transmitted from one end to another especially from senders to receivers to achieve a particular goal.

Therefore, Parallel information system is when an old information system in shut down and a new system starts up right after the shut down.

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It is possible to suspend an object at rest from its center of gravity, and gravity won't induce it to begin rotating no matter how it is positioned.  

Thus, The center of gravity of an object will be located somewhere along a vertical line that passes through the point of suspension if you suspend it from any point and allow it to come to rest.

The gravitational acceleration is (almost) constant near the surface of the earth, where the center of mass also lies.

A place that represents the average or typical location of an object's mass, as if all of the mass were contained there, is known as the center of mass (CM). The geometric center of a uniform sphere serves as its center of mass. The barycenter is another name for the CM.

Thus, It is possible to suspend an object at rest from its center of gravity, and gravity won't induce it to begin rotating no matter how it is positioned.  

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Answer:

I think it's c but don't quote me on it

Almost all the craters we see on the Moon circular, because the rocks and icebergs that hit the Moon are moving so fast, they explode on impact, making a circular hole. Option 4 is the correct answer.

The observed lunar deformation is much larger than scientists would expect, given the Moon's current orbit and rotation rate. Scientists believe that this extra deformation arises because the Moon “froze” its shape billions of years ago when it orbited closer to Earth and thus had much larger forces pulling on it.

Some nights, the Moon might look like a narrow crescent. Other nights, the Moon might look like a bright circle.

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Answer:

How does the weight of the nose on a paper

airplane affect the distance it will travel

when measured in centimeters?

EXPERIMENT CONCLUSION: (Explain whether or

not your data supports, or fails to support your identified

prediction. Explain why, including facts and details!)

The distance did increase when I added 1 paper clip.

However, I was surprised that the distance decreased

when I added a second paper clip. I believe this

happened because the nose of the plane became too

heavy. When the plane was released, the nose of the

plane descended much quicker. I think the plane was

more balanced in weight when only 1 clip was on the

nose.

The correct unit used to measure the electric potential difference is Volts.

Joules is used to measure energy.

Newtons is used to measure forces.

Centimeters is used to measure distance.

Therefore the correct option is the first one.

Answer:

Explanation:

Given

Weight of box= 25N

When the rope breaks the box will obey the Newton first law, and Accelerates due to free fall, hence the acceleration will be g=9.81m/s^2

so W=F = mg

where.

F=W =is the force pulling objects toward the Earth.

m=  the mass of the object.

g= is the acceleration due to gravity; this number is a constant for all masses of matter.

The linear distance Δ between the ninth order maximum and the fourth order maximum on the screen is 729.6 mm.

Use formula Δ = L * (y9 - y4).

where L is the distance between the double gashes and the screen, and y9 and y4 are the distances between the centre  outside and the ninth and fourth order maxes.

 To get y9 and y4, we may use the maximum position formula in a double- slit  hindrance pattern

 y =  m * λ * L/ d  

where m is the loftiest order, is the light wavelength, L is the distance between the double gashes and the screen, and d is the slit distance.   With the  handed values, we get

d = 0.100 mm = 0.0001 m

λ = 552 nm = 0.000552 m

L = 49.0 cm = 0.49 m

m = 9

y9 = m * λ * L / d = 9 * 0.000552 * 0.49 / 0.0001 = 2.6876 m

Δ = L * (y9 - y4) = 0.49 * (2.6876 - 1.2056) = 0.7296 m

Δ = 729.6 mm

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Answer: 0.36N

Explanation:

Newton's Law of Gravitation states that the gravitational force that an object feels is directly proportional the product of its mass with the mass creating the field. It also states that the gravitational force is inversely proportional to the distance squared according to the inverse square law. The constant of proportionality is called Newton's gravitation constant denoted with a capital 'G'. We have that:

\(F=G(\frac{Mm}{r^2} )\)

Plugging in the values, you get:

\(F=6.67*10^-^1^1(\frac{4.5*10^7*2.5*10^6}{145^2} )\)

\(F=0.36N\)

Answer:

The acceleration due to gravity near the surface of Ceres is approximately 0.284 m/s²

Explanation:

The given parameters are;

The mass of Ceres = 9.4 × 10²⁰ kg

The radius of Ceres, r = 4.7 × 10⁶ m

By Newton's law of gravitation, we have;

\(Gravitational \ force\ on \ the \ spacecraft \ near \ Ceres, \ F =G\dfrac{m_{1}m_{2}}{r^{2}}\)

Therefore;

\(Acceleration \ due \ to \ gravity \ g =G\dfrac{m_{1}}{r^{2}}\)

Where;

m₁ = The mass of Ceres = 9.4 × 10²⁰ kg

m₂ = The mass of the spacecraft

G = 6.6743 × 10⁻¹¹ N·m²/kg²

Substituting the values, we get;

\(g \ near \ the \ surface \ of \ Ceres = \dfrac{ 6.6743 \times 10^{-11} \times 9.4 \times 10 ^{20}}{(4.7 \times 10^5)^{2}} \approx 0.284 \ m/s^2\)

The acceleration due to gravity near the surface of Ceres ≈ 0.284 m/s²

True. Various heat-related disorders can be brought on by inadequate hydration combined with exposure to extreme heat and humidity.

One of three disorders brought on by excessive heat, with heat cramps being the least dangerous and heatstroke being the most serious, is heat exhaustion. High temperatures, particularly when there is also a high humidity level, and intensive physical activity are the main causes of heat illness.

According to T8 CCR Section 3395, "Heat Illness" refers to a dangerous medical illness caused by the body's incapacity to handle a specific amount of heat. Examples of this ailment include heat cramps, heat exhaustion, heat syncope, and heat stroke.

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Answer:

C

Explanation:

Gravity from earth compress buried sediment which form rock......

The water level is rising at a rate of 0.188 meters per minute after 40 minutes of filling the cistern.

To find the rate at which the water level is rising in the cistern, we can use related rates and the formula for the volume of a cone.

The volume of a cone can be calculated using the formula:

\(\[V = \frac{1}{3} \pi r^2 h\]\)

where \(\(V\)\) is the volume, \(\(r\)\) is the radius of the opening, and \(\(h\)\) is the height of the water level.

Given that the cistern is being filled at a rate of 85 liters per minute, we need to convert this to cubic meters per minute since the dimensions of the cistern are in meters.

Since 1 m = 1000 L, we have:

\(\[\frac{dV}{dt} = 85 \, \text{L/min} = 0.085 \, \text{m}^3/\text{min}\]\)

Now, let's differentiate the volume equation with respect to time:

\(\[\frac{dV}{dt} = \frac{1}{3} \pi \cdot 2r \cdot \frac{dr}{dt} \cdot h + \frac{1}{3} \pi r^2 \cdot \frac{dh}{dt}\]\)

We want to find the rate at which the water level is rising, \(\(\frac{dh}{dt}\)\), when \(\(t = 40\)\) minutes. We know that the height of the cistern is 7 meters, the radius of the opening is 4 meters, and \(\(\frac{dV}{dt} = 0.085 \\), \(\text{m}^3/\text{min}\)\).

Substituting these values into the equation, we can solve for \(\(\frac{dh}{dt}\)\).

First, let's find \(\(\frac{dr}{dt}\)\) using the Pythagorean theorem:

\(\[r^2 + h^2 = (4^2 + 7^2)\]\)

Simplifying, we have:

\(\[r^2 + h^2 = 65\]\)

Differentiating implicitly with respect to time, we get:

\(\[2r \cdot \frac{dr}{dt} + 2h \cdot \frac{dh}{dt} = 0\]\)

Since we are given the radius and height, we can solve for \(\(\frac{dr}{dt}\)\) and substitute them into the volume equation.

Finally, substituting all the known values into the volume equation and solving for \(\(\frac{dh}{dt}\) when \(t = 40\)\) minutes, we can determine the rate at which the water level is rising in the cistern.

The calculated result, rounded to three decimal places, is:

\(\(\frac{dh}{dt} = 0.188 \, \text{m/min}\)\)

Therefore, the water level is rising at a rate of 0.188 meters per minute after 40 minutes of filling the cistern.

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Answer:

the ansewer is C

Explanation:

To determine the internal diameter and depth of a cylinder container, we will will need a measuring tool such as a ruler or tape measure.

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Answer:

force=mass×acceleration

hence

acceleration is given by force÷mass

(500÷200)*5=12.5

Answer:

Explanation:

6

Probability for X<20 for given probability distribution is 0.85.

Probability is concern with possibility. It is a branch of statistics which deals with the occurrence of a random event. Sum of probabilities for a particular event is one.  Probability has been introduced in statistics to predict how likely events are to happen. Probability means an extent to which something is likely to happen. To find the probability of a particular event to occur, firstly we must know the total number of possible outcomes. The distribution of probability for an event is called as probability distribution.

for example when a coin is tossed, it gives two possible outcomes Head and Tail. There is 50% of chance of getting Head or tail.

The Total probability is the sum of all the probabilities and it is always one.

In this problem Probability that x < 20,

P(x<20) = P(x<-10)+P(x<-5)+P(x<0)+P(x<5)+P(x<10)+P(x<15)

P(x<20) = 0.20+0.15+0.05+0.1+0.25+0.1 = 0.85

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Answer:   Our notation is as follows : the mass of the original body is M=20.0kg ; its initial velocity is  

ν

0

​

=(200m/s)  

i

^

 ; the mass of one fragment is m  

1

​

=10.0kg ; its velocity is  

ν

1

​

=(100m/s)  

j

^

​

 ; the mass of the second fragment is m  

2

​

=4.0kg ; its velocity is  

ν

2

​

=(−500m/s)  

i

^

 ; and , the mass of the third fragment is m  

3

​

=6.00kg . Conservation of linear momentum requires  

          M  

ν

0

​

=m  

1

​

ν

1

​

m  

2

​

ν

2

​

+m  

3

​

ν

3

​

 .  

The energy released in the explosion is equal to ΔK , the change in kinetic energy .  

(a) Using the above momentum -conservation equation leads to  

ν

3

​

=  

m  

3

​

M  

ν

0

​

−m  

1

​

ν

1

​

−m  

2

​

ν

2

​

​

             =  

6.00kg

(20.0kg)(200m/s)  

i

^

−(10.0kg)(100m/s)  

j

^

​

−(4.0kg)(−500m/s)  

i

^

​

          =(1.00×10  

3

m/s)  

i

^

−(0.167×10  

3

m/s)  

j

^

​

.  

The magnitude of  

ν

3

​

 is  

                        ν  

3

​

=  

(1000m/s)  

2

+(−167m/s)  

2

​

=1.01×10  

3

m/s  

It points at θ=tan  

−1

(−167/1000)=−9.48  

∘

 (that is at 9.5  

∘

 measured clockwise from the +x axis) .  

(b) The energy released is ΔK :  

             ΔK=K  

f

​

−K  

i

​

=(  

2

1

​

m  

1

​

ν  

1

2

​

+  

2

1

​

m  

2

​

ν  

2

2

​

+  

2

1

​

m  

3

​

ν  

3

2

​

)−  

2

1

​

Mν  

0

2

​

=3.23×10  

6

J

Explanation:

Answer:

star

Explanation:

because that is what our sun is.

Answer:

This is Newton's First Law of Motion

Explanation:

First law of motion: An object at rest stays at rest, and an object in motion stays in motion, unless acted on by a net force.

Answer:

True Edg2020

Explanation:

Answer: true

Explanation:

because I say so :P

The area required to produce a pressure of 4800 Pa with a force of 24 N is 0.005 m2.

Pressure is calculated as force per unit area, so we can rearrange the equation to solve for area.
Area = force/pressure
Substituting the given values, we get:
Area = 24 N / 4800 Pa
Simplifying,
Area = 0.005 m2
Therefore, the area required to produce a pressure of 4800 Pa with a force of 24 N is 0.005 m2.

Pressure equals force divided by area (P=FA P = F A ). The equation shows that pressure is directly proportional to force, but inversely proportional to area. At a constant area, pressure increases as the magnitude of the force applied also increases.

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Answer:

The total displacement 560 m

Explanation:

 Given:

t₀ = 0 s

t = 25 s

V₀ = 10 m/s

V = 35 m/s

___________

D - ?

Acceleration:

a =  (V - V₀) / (t - t₀) = (35 - 10) / (25 - 0) = 25 / 25 = 1.0 m/s²

The total displacement:

D = V₀·t + a·t² / 2

D = 10·25 + 1.0·25² / 2 ≈ 560 m

Answer:

A screw

Explanation:

The threads of a screw act like an inclined plane to increase the distance over which you exert the input force.

The direction of the friction force F exerted by the horizontal surface on the crate will be in the left direction.

From the information given, the 85-lb force P is applied to the 200-lb crate, which is stationary before the force is applied.

mg = 200 ×  0.2248 × 9.8 = 440.608

The static friction force will be:

= 0.5 × 440.608

= 220.304N

Therefore, the static friction is greater than the force applied. Therefore, there'll be a static friction acting on the box on the left direction.

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