3 years ago

I need help on the sled wars gizmo assignment please help me

Physics

2 answers:

alexandr402 [8]3 years ago

8 0

I’m pretty sure it’s 2 snowman will ride down the red sleigh and I don’t know how to explain the rest

Fiesta28 [93]3 years ago

5 0

Answer:

Explanation:

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What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?

marshall27 [118]

If that's the case, then

      50 units = 0.55 x the input energy

Divide each side by 0.55 :

   50 units/0.55 = the input energy =

   <em> 90 and 10/11 units</em>

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4 years ago

The following table lists the speed of sound in various materials. Use this table to answer the question.

aksik [14]

Answer:

Sound will travel the slowest in Air

Explanation:

The higher the m/s is, the faster the sound travels

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3 years ago

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A chair of weight 125 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 3

iris [78.8K]

Answer:

N = 148.10N

Explanation:

GIVEN

Weight =125 N

force = 35

angle =42°

since there is no vertical acceleration $a_{y} = 0$ from

free body diagram

$\Sigma fa_{y} = ma_{y} = 0$

$N-W-Fsin42\degree = 0\\\\N= W+Fsin42\\N = 125+35\times 0.66\\N = 148.10 N$

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4 years ago

Suppose the mass of a fully loaded module in which astronauts take off from the Moon is 12,900 kg. The thrust of its engines is

Alexandra [31]

Answer:

Acceleration a=0.5 m/s²

Explanation:

Given data

Mass m=12,900 kg=1.29×10⁴kg

Thrust of engine F=28,000 N=2.8×10⁴N

gravitational acceleration g=1.67 m/s²

To find

Acceleration

Solution

As we know that

$W_{weigth}=mg\\ W=(1.29*10^{4}kg )(1.67m/s^{2} )\\W=21543N$

The net force can be given as

$F_{net}=F_{thrust}-W\\F_{net}=(2.8*10^{4}-21543)N\\ F_{net}=6457 N$

From Newtons second law of motion we know that

$F=ma\\a=F/m\\a=\frac{6457N}{12,900kg}\\ a=0.5m/s^{2}$

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3 years ago

Explain the evidence that Neils Bohr used to confirm that the electrons in an atom orbit in fixed shells. (4)

Wittaler [7]

Answer:

Break the limit

Explanation:

A perfect combination

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3 years ago