Using the graph above determine the change in velocity between 0.0 s and 4.0 s.
- 1.0 m/s
1.0 m/s
-8.0 m/s
- 16 m/s

Answer:

b

Explanation:

if there is a fire there is no time to waist

The answer depends on depends on your age and your capacities:

If you are a child, the correct option is A.

If you are a scientist adult, the correct option is B.

I will assume that you are a child, so you shouldn't be in any danger. In a laboratory, we can find a lot of glass and flammable things, so it is really dangerous to be near a fire.

Then really easily we can conclude that the correct option is A, immediately notify your instructor (who should have the knowledge to handle the situation)

Never try to handle it by yourself, especially never throw water on the fire, as there are a lot of cases (like if some oil starts combusting) where throwing water will make the situation a lot worst.

Now, if you are an adult and you are instructed in how to handle lab hazards, you should know where the nearest fire extinguisher is, then you can run to get it and extinguish the fire before it goes out of control.

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Answer:

The charge of an atom is the number of protons minus the number of electrons.

Explanation:

Explanation:

It is (Harder/easier) to push an empty wheelbarrow than one filled with dirt. Because the dirt-filled wheelbarrow has more (Force/Speed/Mass) than the empty one, it requires more (Force/Inertia/Acceleration) to push at the same speed. A wheelbarrow containing grass clippings will require (More/Less/The Same) force to push at the same speed than a dirt-filled one because the grass clippings have less mass than dirt. Either wheelbarrow will require more force to push it uphill than downhill due to the effect of (Friction/Inertia)

Answer:

2.7

Explanation:

V=s÷t

v=13.5÷5.0

V=2.7

pull of earths gravity.........

Answer:

plastic

Explanation:

because it is an insulator that it is a poor conductor of electricity.

There is no flow of electricity in the plastic, so the plastic has greater resistance.

A substance's ability to obstruct the flow of electrical current is referred to as resistance. It is symbolized by the capital letter R. The ohm, frequently written as a word and sometimes represented by the capital Greek letter omega, is the unit of resistance that is typically used.

A component's resistance is one ohm when a one-volt potential difference (voltage) is present. The current in a direct-current (DC) electrical circuit is inversely proportional to the resistance, while the supplied voltage is held constant. The current is cut in half when the resistance is doubled; when the resistance is cut in half, the current is increased by double.

Thus, plastic has greater resistance.

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#SPJ5

Answer:

1.38 s

Explanation:

Use the free falling formula

T = √(L)/ g

T = √18.75/9.8

T = 1.38 s

Answer:

Frequency = 100 Hz

Time period = 0.01 sec

Explanation:

f= 3500/35 = 100

T = 1/f = .01

Answer: 33

Explanation:

12+3=15, so in 3 years time Ruto will be 15.

Because 15 is said to be 1/3 times his fathers present age (x), you can plug that into an equation.

15=1/3(x)

Then solve the equation.

(3)15=[1/3(x)]•3

45=x

His father is currently 45, so if you subtract 12 from that, you get 33.

Ruto’s father was 33 years old 12 years ago.

Answer:

It is 10.75

Explanation:

Answer:

5,865,696,000,000 miles

Explanation:

one year = 31536000 second

31536000 × 186000 = 5,865,696,000,000

Using 1st equation of kinematics

[tex]\\ \sf\longmapsto v=u+at[/tex]

[tex]\\ \sf\longmapsto v=4.24+2.91(-1.76)[/tex]

[tex]\\ \sf\longmapsto v=|4.24-5.12|[/tex]

[tex]\\ \sf\longmapsto v=0.8m/s[/tex]

Answer:

Safety

Explanation:

Expressways are banked to resist centifugal action

Answer:

three light sources at different directions, maybe of different sizes and intensity

Answer:

hope this helps

Explanation:

Simple machines that are widely used include the wheel and axle, pulley, inclined plane, screw, wedge and lever. While simple machines may magnify or reduce the forces that can be applied to them, they do not change the total amount of work needed to perform the overall task.

Answer:

2.2

Explanation:

It then pauses before flying with an average velocity of 6.8 m/s east for 3.5 s to another branch.

Answer:

9 m/s

Explanation:

The seagull flew at a constant velocity for a total of 32 seconds.

One-quarter of 32 is:

[tex]\implies \dfrac{1}{4} \times 32=\dfrac{32}{4}=8\; \sf seconds[/tex]

Therefore, if the seagull flew 72 meters in one-quarter of 32 seconds, it flew 72 meters in 8 seconds.

[tex]\boxed{\sf Speed=\dfrac{Distance}{Time}}[/tex]

To find the velocity (speed) of the seagull, substitute the distance and time into the formula:

[tex]\implies \sf Velocity=\dfrac{72}{8}=9\; \sf m/s[/tex]

The displacement of the mouse is 5m and the total distance is 9m.

The given parameters;

initial displacement of the mouse = 5 m north

second displacement = 1 m South

third displacement = 3 m west

To find:

Displacement is the change in the final position and the initial position of an object.

Distance is the total path covered by the object.

When the mouse was at 1 m south, the displacement = 5 m - 1m = 4m

The displacement of the mouse between 4m south and 3m west is calculated by using Pythagoras theorem.

[tex](displacement)^2 = 3^2 + 4^2\\\\(displacement)^2 = 25\\\\displacement = \sqrt{25} \\\\displacement = 5 \ m[/tex]

The total distance of the mouse = 5 m + 1m + 3m = 9m

Thus, the displacement of the mouse is 5m and the total distance is 9m.

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Answer:

2 Newton

Explanation:

from newton second law

F = ma

as we have the mass equals 4 kg

we need to get the acceleration which will be change in velocity over change in time

a = ∆V/∆t = (4-2)/4 = 0.5

so F = 4 * 0.5 = 2

Answer:2N

Explanation:

Answer:

the answer is 13.33 m/s²

If the car travels a distance greater than 10 km in one hour or less than one hour, it has exceeded the speed limit.

The given parameter:

speed limit =  10 km/hour

To find:

Speed is defined as the total distance traveled divided by the total time taken for the journey.

[tex]speed = \frac{distance}{time}[/tex]

If the car travels any distance greater than 10 km in 1 hour or less than 1 hour, it has exceeded the speed limit of 10 km/hr.

For example, let's say the distance traveled by the car in one hour is 11 km. The speed of the car is 11 km/hr which is greater than the speed limit.

Thus, we can conclude that if the car travels a distance greater than 10 km in one hour or less than one hour, it has exceeded the speed limit.

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ball a

Explanation,

Hope it helps

Answer:

50m/s

Explanation:

here;

distance travelled(s): 200m

time taken(t): 4s

now

velocity(v): s/t

= 200/4

Velocity: 50m/s#

Answer:

x×y=2×2=4. 4×z=4×3=12. 4+12=16

Answer:

Opposite direction

Explanation:

For example: The first object travels in the direction pointing to east, while the other one travels pointing to the west.

The first object will have a positive value while the second one will have a negative, cause it's going to the opposite direction

The Answers are in attachment.

We know that

Velocity is given by the rate of change of position w.r.t time

[tex]\\ \sf\longmapsto v=\dfrac{dx}{dt}[/tex]

[tex]\\ \sf\longmapsto vdt=dx[/tex]

[tex]\\ \sf\longmapsto (u+at)dt=dx[/tex]

[tex]\\ \sf\longmapsto u{\displaystyle{\int}_0^t}dt+a{\displaystyle{\int}_0^t}dt={\displaystyle{\int}^x_{x_0}}dx[/tex]

[tex]\\ \sf\longmapsto ut+\dfrac{1}{2}at^2=(x-x_0)[/tex]

[tex]\\ \sf\longmapsto x=x_0+ut+\dfrac{1}{2}at^2[/tex]