Which one is it
Plz help me :)

Answer:

A)833N

Explanation:

weight=9.8x85=833N

I hope it helps

Answer:

His first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. In other words its  inertia.

Explanation:

Newtons first law of motion states that"A body will continue to its state of rest or motion unless external force acted upon it.

Answer:

Explanation:

We shall represent vector B and C in terms of i and j .

B = 5 cos115 i + 5 sin115 j

= -2.11 i + 4.53j

Similarly

C = 4 cos255 i + 4 sin225 j

= -1.04 i -3.86 j

R = B + C

= -2.11 i + 4.53j  -1.04 i -3.86 j

= -3.15 i + .67 j

magnitude of R

= √( 3.15² + .67² )

= √( 9.92 +.45 )

= 3.22

Angle Ф

TanФ = - .67 / 3.15

= - .21

Ф = - 12⁰

= 180 - 12

= 168 degree counterclockwise from positive x axis.

Answer:

the answer is a low melting point

Explanation:

on edge

Low melting point is the most important property of covalent compounds that makes them useful for making candle wax.

A molecule created by covalent bonding whereby the atoms possess one or much more pair of valence electrons is referred to as a covalent compound. Covalent compounds or ionic compounds are the two groups into which chemical compounds are often divided.

Ionic compounds are composed of atoms or molecules that have gained or lost electrons, causing them to become electrically charged. Ionic compounds are created when ions with opposing charges come together, typically when a metal interacts with a nonmetal. Low melting point is the most important property of covalent compounds that makes them useful for making candle wax.

To know more about covalent compound, here:

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Answer:

The fact that a double concave lens is thinner across its middle is an indicator that it will diverge rays of light that travel parallel to its principal axis. A double concave lens is a diverging lens.

Answer:

Lord Henry Cavendish

Explanation:

The constant of proportionality in this equation is G - the universal gravitation constant. The value of G was not experimentally determined until nearly a century later (1798) by Lord Henry Cavendish using a torsion balance.

Answer: Lord Henry Cavendish.

Answer:

i cap is the unit vector for x axis

eg 2 i cap

j cap is the unit vector for y axis

eg 3 j cap

hope it will help you

Explanation:

Answer:

Compound

Explanation:

Answer:

Compound

Explanation:

Its molecules consist of one carbon atom joined to two oxygen atoms. If you have more than one element chemically bonded, it is a compound.

Answer:

the speed is equal to 6 m/s

Explanation:

Answer:

everyone else does this to me so lol

Explanation:

Answer:

1. 9 m/s/s

2. 33 m/s

3. 5 m/s/s

4. 9.6 m/s

Explanation:

Answer:

500Nm/s

Explanation:

500

this is the Plato answer!!!!!!

Answer:

C

Explanation:

Answer:

c

Explanation:

e2020

Answer:

The kinetic coefficient of friction between the runners of the sled and the snow is approximately 0.176.

Explanation:

At first we present a free body diagram of the sled as an image attached below. From 1st and 2nd Newton's Laws we know that an object is at equilibrium when it is either at rest or moving at constant velocity. The equations of equilibrium associated with the sled is:

[tex]\Sigma F_{x'} = f-W\cdot \sin \theta = 0[/tex] (1)

[tex]\Sigma F_{y'} = N-W\cdot \cos \theta = 0[/tex] (2)

Where:

[tex]\theta[/tex] - Inclination of the hillside, measured in sexagesimal degrees.

[tex]N[/tex] - Normal force from ground to sled, measured in newtons.

[tex]W[/tex] - Weight of the sled, measured in newtons.

[tex]f[/tex] - Kinetic friction between sled and ground, measured in newtons.

The definitions of kinetic friction and weight are, respectively:

[tex]f=\mu_{k}\cdot N[/tex] (3)

[tex]W = m\cdot g[/tex] (4)

Where:

[tex]\mu_{k}[/tex] - Kinetic coefficient of friction, dimensionless.

[tex]m[/tex] - Mass of the sled, measured in kilograms.

[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.

By applying (3) and (4) in (1) and (2), we have the following system of equations:

[tex]\mu_{k}\cdot N-m\cdot g\cdot \sin \theta = 0[/tex] (1b)

[tex]N -m\cdot g \cdot \cos \theta = 0[/tex] (2b)

And by applying (1b) in (2b), we have the following expression for the kinetic coefficient of friction:

[tex]\mu_{k}\cdot m\cdot g \cdot \cos \theta -m\cdot g \cdot \sin \theta = 0[/tex]

[tex]\mu_{k} = \tan \theta[/tex] (5)

If we know that [tex]\theta = 10^{\circ}[/tex], then the kinetic coefficient of friction between the runners of the sled and the snow is:

[tex]\mu_{k} = \tan 10^{\circ}[/tex]

[tex]\mu_{k}\approx 0.176[/tex]

The kinetic coefficient of friction between the runners of the sled and the snow is approximately 0.176.

Explanation:

The battery is a store of internal energy (shown as chemical energy). The energy is transferred through the wires to the lamp, which then transfers the energy to the surroundings as light. These are the useful energy transfers - we use electric lamps to light up our rooms.

Answer:

a = 5.33 [m/s²]

Explanation:

To solve this problem we must use Newton's second law which tells us that the sum of the forces acting on a body is equal to the product of mass by acceleration.

ΣF = m*a

where:

F = force = 400 [N]

m = mass = 75 [kg]

a = F/m

a = 400/75

a = 5.33 [m/s²]

Answer:

Her error was that she did not subtract 12 from 8 correctly

Explanation:

Jackie did 8-12 instead of 12-8

Answer:

Rubber soled sneakers make it harder to slip while running

Explanation:

Answer:

the answer is C

Explanation:

because the moon has to be in front of the sun hope this helps

Explanation:

may be (C) is the correct answer .

Answer:

La esfera no flotará pero se hundirá cuando se coloque en el agua porque su densidad es mayor que la del agua.

Explanation:

De la pregunta anterior, se obtuvieron los siguientes datos:

Radio (r) de la esfera = 0,4 m

Masa de esfera = 300 Kg

Densidad del agua = 1000 Kg / m³

A continuación, determinaremos el volumen de la esfera. Esto se puede obtener de la siguiente manera:

Radio (r) de la esfera = 0,4 m

Pi (π) = 3,14

Volumen (V) de la esfera =?

V = 4/3 πr³

V = 4/3 × 3,14 × 0,4³

V = 12,56 / 3 × 0,064

V = 0,27 m³

A continuación, determinaremos la densidad de la esfera. Esto se puede obtener como se ilustra a continuación:

Masa de esfera = 300 Kg

Volumen de esfera = 0,27 m³

Densidad de esfera =?

Densidad = masa / volumen

Densidad de la esfera = 300 / 0,27

Densidad de la esfera = 1111,11 Kg / m³

Comparando la densidad del agua y la de la esfera.

Sustancia >>>>>>> Densidad

Agua >>>>>>>>>>> 1000 Kg / m³

Esfera >>>>>>>>>> 1111,11 Kg / m³

De la ilustración anterior, podemos ver que la densidad de la esfera es mayor que la del agua.

Por lo tanto, la esfera no flotará sino que se hundirá cuando se coloque en el agua porque su densidad es mayor que la del agua.

Answer:

0.12A

Explanation:

v=ir

I=v÷r

6÷50=0.12A

Answer:

ggggggg

Explanation:

Options A, B & D are true.

We are dealing with the concept of inertia.

This means that inertia is the force that keeps an object at rest or in constant motion.

Read more at; brainly.com/question/13656225

Answer:

The correct option is;

c. He conducted experiments with balls and inclined planes

Explanation:

The inclined plane experiment conducted by Galileo Galilei was one of his most important experiments.

The experiment consisted of a grooved board with which a small metal ball is rolled down in, so as to analyze the held Aristotelian ideas about motion.

In the experiment, the focus was on acceleration, a concept that the previously held ideas about motion

A. Oysters, clams, and other shellfish are efficient filter feeders that help remove excess nitrogen from waters by incorporating it into their shells and tissue as they grow. ... Adult oysters reportedly can filter up to 50 gallons a day, while large quahogs (hard clams) can clean about 24 gallons of water a day

Answer:

B

Explanation:

There are a pair of forces acting on the 2 interacting objects

You're welcome <3

Answer:

1. I would like to change the time of distraction. Because 8 s is a long time to be distracted while driving on the road. Its not safe for the driver and the other people on road if the driver is distracted even for a second.

2. s₁ = 80 m

3. s₂ = 5 m

4. t = 1.25 s

5. s₃ = 7.5 m

6. s = 92.5 m    

Explanation:

1.

I would like to change the time of distraction. Because 8 s is a long time to be distracted while driving on the road. Its not safe for the driver and the other people on road if the driver is distracted even for a second.

2.

Distance Covered While Distracted = s₁ = (speed of car)(distraction time)

s₁ = (10 m/s)(8 s)

s₁ = 80 m

3.

Distance Covered While Reacting = s₂ = (speed of car)(reaction time)

s₂ = (10 m/s)(0.5 s)

s₂ = 5 m

4.

Using 1st equation of motion braking motion:

Vf = Vi + at

where,

Vf = Final Speed = 0 m/s

Vi = Initial Speed = 10 m/s

a = acceleration = - 8m/s²

t = ?

Therefore,

0 m/s = 10 m/s + (-8m/s²)t

t = (10 m/s)/(8 m/s²)

t = 1.25 s

5.

Now, using second equation of motion:

Distance Covered While Braking = s₃ = Vi t + (1/2)at²

s₃ = (10 m/s)(1.25 s) + (1/2)(-8m/s²)(1.25 s)²

s₃ = 12.5 m - 5 m

s₃ = 7.5 m

6.

Total Distance = s = s₁ + s₂ + s₃

s = 80 m + 5m + 7.5 m

s = 92.5 m

Answer:

I don't understand

Explanation:

Answer:

1,500 N

Explanation:

Given:

Mass = 150 kg

Gravitational acceleration = 10m/s²

Find:

Force

Computation:

Force = mg

Force = 150 x 10

Force = 1,500 N