What instrument use lenses or mirrors to collect and focus light from distant objects?

Answers

Answer 1

Answer: Optical telescopes do that.

Answer 2

Answer: I believe that would be a telescope. not 100% on that but it makes sense to me.

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A candy bar supplies your muscles with energy. If your muscles are 40% efficient, how much work can they perform if the candy contains 800 J?

Answers

Answer:

The muscles can perform 320 J of work.

Explanation:

Let the work performed by the muscles be $W_(out)$ J.

Efficiency of a body is given as the ratio of useful work to that of work supplied.

Here, the work provided by the candy bar is, $W_(in)=800\ J$

Efficiency of the muscles is, $\eta =40\%=0.40$

Now, we know that,

$\textrm{Efficiency,}\ \eta=(W_(out))/(W_(in))\n0.40=(W_(out))/(800)\nW_(out)=0.40* 800=320\ J$

Therefore, the work performed by the muscles is 320 J.

Which of the following best describes the behavior of silica rich magmaA. Highly viscous and associated with violent eruptions
B. Highly viscous and associated with quiet volcanic eruptions
C. Stays deep within earth because of low viscosity
D. Cannot flow but is limited to fixed areas of hotspot volcanism

Answers

Answer: Option (A)

Explanation: Silica rich magma are those in which the magma has more than 65 % of silica content. The higher the silica content, the higher is its viscosity i.e viscosity of a magma is directly proportional to the silica content of magma.

This highly viscous magma inside the volcanoes moves sluggishly and mostly gets concentrated in the vents and seals them. With time, when the pressure exerted by the magma is too high, it creates violent eruptions through the vents.

Thus, the correct answer is option (A).

Answer:

A. Highly viscous and associated with violent eruptions

Explanation:

Most silica rich magma have high viscosity and huge amount of trapped gases within them. As they continue to upwell and expand, the gases causes violent eruptions near Volcanoes. Most granitic/rhyolitic magma are silica rich.

On earth’s surface, how much does a 100 kg mass weigh?

Answers

Weight = (mass) x (gravity)

Weight = (100kg) x (9.8 m/s^2)

Weight = 980 kg-m/s^2

Weight = 980 Newtons.

(about 220.5 pounds)

Final answer:

The weight of a 100 kg mass on Earth's surface is 980 Newtons(N). This is calculated using the formula 'w=mg', where 'w' is weight, 'm' is mass, and 'g' is the acceleration due to gravity on Earth (9.80 m/s²).

Explanation:

On earth, the weight of an object is determined by the gravitational force acting on it. This can be calculated using the formula w = mg, where 'w' is the weight of the object, 'm' is its mass, and 'g' is the acceleration due to gravity on Earth. Given that the mass 'm' is 100 kg and the acceleration due to gravity 'g' on Earth's surface is approximately 9.80 m/s², we can determine the weight of the object by substituting these values into the formula.

Applying these values into our equation, we get: w = (100 kg)(9.80 m/s²) = 980 N. Therefore, a 100 kg mass weighs 980 Newtons (N) on Earth's surface.

It is pertinent to note that an object's weight can vary based on its location as the value of 'g' changes with location. For instance, the value of 'g' on the moon is only about 1.67 m/s², which is far less compared to Earth, resulting in a lighter weight for the same mass.

Learn more about Weight on Earth here:

brainly.com/question/8900700

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The gravity on earth is 6 times greater than the gravity on the moon. An object weighing 2 lbs. on the moon will weigh:

Answers

The answer would be 6 • 2= 12

What do tendons connect skeletal muscles to?

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Answer:

Tendons connect muscle to bone. These tough, yet flexible, bands of fibrous tissue attach the skeletal muscles to the bones they move. Essentially, tendons enable you to move; think of them as intermediaries between muscles and bones.

Hope this helps! (:

Answer:

Explanation:Tendons connect muscle to bone. These tough, yet flexible, bands of fibrous tissue attach the skeletal muscles to the bones they move. Essentially, tendons enable you to move; think of them as intermediaries between muscles and bones.

How do you find density?

Answers

density = mass / volume

*mass must be in grams and volume must be in liters

With mass and volume!! Hope this helped!!

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