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2 years ago

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When explaining chemical reactions to a friend, Brianna models a reaction by taking several colors of modeling clay and making a

sculpture of a horse. Which type of chemical reaction is Brianna most likely explaining? synthesis decomposition polymerization replacement

2 answers:

Wewaii [24]2 years ago

9 0

Answer:

Synthesis is the correct answer!!!!!!!!!!!!!! :)

Drupady [299]2 years ago

5 0

Answer: synthesis

Explanation:

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A man pushes his child in a grocery cart. The total mass of the cart and child is 30.0 kg. If the force resisting the carts moti

-BARSIC- [3]

The force applied by the man is 60 N

Explanation:

We can solve this problem by applying Newton's second law, which states that:

$\sum F = ma$ (1)

where

$\sum F$ is the net force acting on the child+cart

m is the mass of the child+cart system

a is their acceleration

In this problem, we have:

m = 30.0 kg is the mass

$a=1.50 m/s^2$

And there are two forces acting on the child+cart system:

The forward force of pushing, F
The force resisting the cart motion, R = 15.0 N

Therefore we can write the net force as

$\sum F = F -R$

where R is negative since its direction is opposite to the motion

So eq.(1) can be rewritten as

$F-R=ma$

And solving for F,

$F=ma+R=(30.0)(1.50)+15.0=60 N$

Learn more about Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

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2 years ago

If a cat falls off a ledge, the Earth pulls the cat to the ground with the force of gravity. According to Newton's Third Law the

elena55 [62]

Answer:

<em><u>The</u></em><em><u> </u></em><em>answer</em><em> </em><em>Is</em><em> </em><em>B.</em><em> </em>

Explanation:

<em><u>The</u></em><em><u> </u></em><em><u>cats</u></em><em><u> </u></em><em><u>acceleration</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>decreased</u></em>

<em><u>by</u></em><em><u> </u></em><em><u>air</u></em><em><u> </u></em><em><u>resistance</u></em><em><u>.</u></em><em><u> </u></em>

<em><u>hope</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>helps</u></em><em><u> </u></em><em><u>you</u></em><em><u>!</u></em><em><u> </u></em>

<em><u>follow</u></em><em><u> </u></em><em><u>me</u></em><em><u> </u></em><em><u>for</u></em><em><u> </u></em><em><u>more</u></em>

<em><u>don't</u></em><em><u> </u></em><em><u>worry</u></em><em><u> </u></em><em><u>I'll</u></em><em><u> </u></em><em><u>try</u></em><em><u> </u></em><em><u>my</u></em><em><u> </u></em><em><u>best</u></em>

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2 years ago

Read 2 more answers

To exercise, a man attaches a 4.0 kg weight to the heel of his foot. When his leg is stretched out before him, what is the torqu

Masja [62]

Answer:

B. τ = 16 Nm

Explanation:

In order to find the torque exerted by the weight attached to the heel of man's foot, when his leg is stretched out. We use following formula:

τ = Fd

here,

τ = Torque = ?

F = Force exerted by the weight = Weight = mg

F = mg = (4 kg)(10 m/s²) = 40 N

d = distance from knee to weight = 40 cm = 0.4 m

Therefore,

τ = (40 N)(0.4 m)

<u>B. τ = 16 Nm</u>

8 0

2 years ago

2.0 kg of solid gold (Au) at an initial temperature of 1000K is allowed to exchange heat with 1.5 kg of liquid gold at an initia

Elanso [62]

Answer:

Explanation:

The specific heat of gold is 129 J/kgC

It's melting point is 1336 K

It's Heat of fusion is 63000 J/kg

Assuming that the mixture will be solid, the thermal energy to solidify the gold has to be less than that needed to raise the solid gold to the melting point. So,

The first is E1 = 63000 J/kg x 1.5 = 94500 J

the second is E2 = 129 J/kgC x 2 kg x (1336–1000)K = 86688 J

Therefore, all solid is not correct. You will have a mixture of solid and liquid.

For more detail, the difference between E1 and E2 is 7812 J, and that will melt

7812/63000 = 0.124 kg of the solid gold

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2 years ago

If the outer conductor of a coaxial cable has radius 2.6 mm , what should be the radius of the inner conductor so that the induc

mel-nik [20]

Answer:

Inner radius = 2 mm

Explanation:

In a coaxial cable, series inductance per unit length is given by the formula;

L' = (µ/(2π))•ln(R/r)

Where R is outer radius and r is inner radius.

We are given;

L' = 50 nH/m = 50 × 10^(-9) H/m

R = 2.6mm = 2.6 × 10^(-3) m

Meanwhile µ is magnetic constant and has a value of µ = µ_o = 4π × 10^(−7) H/m

Plugging in the relevant values, we have;

50 × 10^(-9) = (4π × 10^(−7))/(2π)) × ln(2.6 × 10^(-3)/r)

Rearranging, we have;

(50 × 10^(-9))/(2 × 10^(−7)) = ln((2.6 × 10^(-3))/r)

0.25 = ln((2.6 × 10^(-3))/r)

So,

e^(0.25) = (2.6 × 10^(-3))/r)

1.284 = (2.6 × 10^(-3))/r)

Cross multiply to give;

r = (2.6 × 10^(-3))/1.284)

r = 0.002 m or 2 mm

5 0

2 years ago