3 years ago

A ____(concave, convex) mirror is used to collect light in a reflecting telescope

Physics

2 answers:

kati45 [8]3 years ago

4 0

Im pretty sure its Concave.

Inessa05 [86]3 years ago

4 0

Concave mirror is used

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2 years ago

An automobile is sitting on a hill which is 20 m higher than ground level. Find the mass of the automobile if it contains 362,60

mr Goodwill [35]

M= ?
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h=20 m

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3 years ago

A high-jump athlete leaves the ground, lifting her center of mass 1.8 m and crossing the bar with a horizontal velocity of 1.4 m

Romashka [77]

Answer:

The minimum speed when she leave the ground is 6.10 m/s.

Explanation:

Given that,

Horizontal velocity = 1.4 m/s

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Using conservation of energy

$K.E+P.E=P.E+K.E$

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$\dfrac{v_{1}^2}{2}=gh+\dfrac{v_{2}^2}{2}$

Put the value into the formula

$\dfrac{v_{1}^2}{2}=9.8\times1.8+\dfrac{(1.4)^2}{2}$

$\dfrac{v_{1}^2}{2}=18.62$

$v_{1}=\sqrt{2\times18.62}$

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3 years ago

A bullet with an initial kinetic energy of 400 J strikes a wooden block where a 8000 N resistive force stops the bullet. What is

Sindrei [870]

Answer:

d = 0.05 [m] = 50 [mm]

Explanation:

We must remember the principle of conservation of energy which tells us that energy is transformed from one way to another. For this case, the initial kinetic energy is transformed into useful work that is equal to the product of force by distance.

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3 years ago

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Vocabulary should be, I think:
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II. Evidence, data
III. Experiment

What is your question exactly?

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3 years ago

Read 2 more answers