The photograph shows one of the boats in a science club's toy boat race. All the boats were powered by identical
rubber bands. Judges used stopwatches to time how long each rubber band took to unwind. The table shows some
of the data the judges collected.

Answer:

[tex]a=4.03\ m/s^2[/tex]

Explanation:

Given that,

The mass of the motorbike and rider is 286 kg.

We need to find the acceleration of the motorbike at this moment in time.

Net force acting on the bike is given by :

F = 2000 N - 845 N = 1155 N

Let a be the acceleration of the motorbike. So,

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{1155}{286}\\\\a=4.03\ m/s^2[/tex]

So, the acceleration of the motorbike is [tex]4.03\ m/s^2[/tex].

Answer:

4.9 x 10-23 N

Explanation:

I took the test

Answer:

4.9 x 10-23

Explanation:

I just took the test too its

Answer:

Ver explicacion abajo

Explanation:

En este caso para poder calcular el error relativo porcentual, es necesario calcular primero el error absoluto, que se calcula de la siguiente forma:

Error absoluto = Resultado exacto - aproximación

Sin embargo, no tenemos el resultado exacto de las medidas, pero podriamos conocerlo tomando el promedio de estas medidas y este es el que tomaremos como el verdadero resultado de las medidas:

Promedio de medidas = 1.34 + 1.35 + 1.37 + 1.36 / 4

Promedio de medidas = 1.355 m

Ya que tenemos el promedio, podemos calcular el error absoluto de cada medida y luego el error relativo porcentual:

Ea1 = 1.355 - 1.34 = 0.015

Ea2 = 1.355 - 1.35 = 0.005

Ea3 = 1.37 - 1.355 = 0.015

Ea4 = 1.36 - 1.355 = 0.005

Ya que tenemos los 4 errores absolutos, es posible calcular el porcentual:

%error relativo = (Error absoluto / resultado exacto) * 100

Aplicando la expresión con cada uno de los valores tenemos:

%Er1 = (0.015/1.34) * 100 = 1.12%

%Er2 = (0.005/1.35) * 100 = 0.37%

%Er3 = (0.015/1.37) * 100 = 1.09%

%Er4 = (0.005/1.36) * 100 = 0.37%

Espero que te sirva.

Answer:

195

Explanation:

Answer:

The answer is below

Explanation:

Density is the amount of matter contained in a certain space. Objects that are dense are very heavy compared to their size while objects that are not dense are very light compared their size. Therefore most dense objects sink when placed in water while less dense objects floats in water.

Density is the ratio of mass to volume. It is given by:

Density = mass / volume

Crust has a density of 2.2 - 2.9 g/cm³ while core has a density of  9.9 - 12.2 g/cm³ for its outer and 12.8 - 13.1 g/cm³ for its inner.

Therefore if the same amount of a piece of crust is compared to a piece of core, the core would be more heavier since it has more density than the crust.

-Sounds of Vehicles

-Speakers or TV's at High Volume

-Kitchen Appliances

-Electronic Appliances

-Barking of dogs

Answer:

there are many

Explanation:

includeing planes

loud music

cars

traffic noise

Explanation:

Given

force (F) = 75 N

Acceleration (a) = 5 m/s²

Mass (m) = ?

We know

F = m * a

75 = m * 5

m = 75 / 5

m = 15 kg

The mass of the shopping cart is 15 kg.

Hope it will help :)

Answer:

it would be 3

Explanation:

because you have to divide the length by the height of the incline.

The mechanical advantage of an inclined plane that has a length of 9 feet and a height of 3 feet will be 3.

Mechanical advantage is a measure of the ratio of output force to input force in the system, it is used to obtain the efficiency of a mechanism.

The formula for the mechanical advantage of the inclined plane is found as;

[tex]\rm Mechanical \ advantage = \frac{length}{height} \\\\ Mechanical \ advantage =\frac{9}{3} \\\\ Mechanical \ advantage =3[/tex]

Hence the mechanical advantage of an inclined plane that has a length of 9 feet and a height of 3 feet will be 3.

To learn more about the mechanical advantage refer to the link;

https://brainly.com/question/7638820

Explanation:

back ground radiation is a natural radiation so basically everything emits background radiation. so if it were harmful, the world wouldn't be here,

so it is false

it knocks electrons out of atoms, this is because ionising radiation is a radiation that had enough energy to remove electrons form the atoms and molecules.

true because exposure to radon can damage biological molecules such as proteins, which leads to abnormal patterns of cell division, which leads to cancer.

hope it is helpful, if not , you can report and let someone else try it out.

do vote, thank you

I think it's 0.6.                 ∞

Hopefully, it's correct... ∵-∵

Answer:

A morse code alphabet decoder maybe?? I am confused

Explanation:

Answer:

J3rk it in the window ;-)

Explanation:

Answer:

5 kg

Explanation:

Acceleration = 6 m/s^2

Force = 30 N

Force = mass * acceleration

mass = force / acceleration

mass = 30 / 6

mass = 5 kg

Answer:

There is some sort of "rollers" on the trail part that is used to make the roller coaster move when it is going up. Then because of that, the speed gets quicker when it drops down, so then it could move for a longer time until it reaches the next arch.

Explanation:

hope this helps :)

Answer:

G is called the constant of gravitation and is equal to 6.67 × 10−11 newton-metre2-kilogram−2.

Explanation:

Answer:

Hail occurs in warm weather, while sleet occurs during cold weather. When the temperature falls below 32 degrees, precipitation falls out of a cloud as snow. ... Unlike hail, sleet is tiny in size and falls only once from the sky.

Explanation:

Hopefully its right :)

Answer:

The average velocity is 7.5 km/h

Explanation:

Were Gonna convert minutes to hours

12 minutes = 12/60  hours = 0.2 hours

Now we estimate the average velocity of the distance traveled over this time

1.5 / 0.2 km/h = 7.5 km/h

Answer:

1.2 mph

Explanation:

14.4 ÷ 12 = 1.2

Answer:

c

Explanation:

tbh I think it is c because of what the explanation says so

Answer:

D

Explanation:

because i got it right when guessing its d

Answer:

fff

Explanation:

f

Answer:

True

Explanation:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow

Answer:

25

Explanation:

The kinetic energy is 25

Answer:

d. 12.30 grams

Explanation:

Given the following data;

Force = 652 N

Acceleration = 53 m/s²

To find how much the object weigh, we would need to determine its mass;

Force = mass * acceleration

652 = mass * 53

Mass = 652/53

Mass = 12.30 grams.

Therefore, the object weighs 12.30 grams.

Answer:

Acceleration = 6m/s²

Explanation:

Given the following data;

Initial velocity = 35m/s

Final velocity = 65m/s

Time = 5 seconds

To find the 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.

Mathematically, acceleration is given by the equation;

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

Where,

Substituting into the equation, we have

[tex]a = \frac{65 - 35}{5}[/tex]

[tex]a = \frac{30}{5}[/tex]

Acceleration = 6m/s²

Answer: When objects fall to the ground, gravity causes them to accelerate.

Explanation: Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.

Answer:

thermal

Explanation:

Answer:54cm²

Explanation:Area of first rectangle=L×B=6×5=30cm²

Area of second rectangle=L×B=8×3=24cm²

Areas are added to 54cm²

Answer:

18.03

Explanation:

You use Pythagoras theorem to work out the diagonal

Hope this helps :)

Answer:

Many volcanoes in the Ring of Fire were created through a process of subduction. And most of the planet's subduction zones happen to be located in the Ring of Fire. Subduction happens when tectonic plates shift, and one plate is shoved under another.

Explanation:

Answer:

D

Explanation: That is the lowest point in a cycle

Answer:

I just had a question the same as this.

The answer is: Points (B) & (F)!

Hope it helps! :D