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3 years ago

What is frame of reference?

Physics

2 answers:

Dmitry [639]3 years ago

6 0

Answer:

A set of criteria or stated values in relation to which measurement or judgments can be made.

Usimov [2.4K]3 years ago

5 0

In physics and astronomy, a frame of reference consists of an abstract coordinate system whose origin, orientation, and scale are specified by a set of reference points ― geometric points whose position is identified both mathematically and physically.

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The height (in meters) of a projectile shot vertically upward from a point 2 m above ground level with an initial velocity of 23

Burka [1]

Answer:

a) $v(2) = 3.9\,\frac{m}{s}$ , b) $v(4) = -15.7\,\frac{m}{s}$

Explanation:

a) The equation for vertical velocity is obtained by deriving the function with respect to time:

$v(t) = 23.5 -9.8\cdot t$

The velocities at given instants are, respectivelly:

$v(2) = 3.9\,\frac{m}{s}$

$v(4) = -15.7\,\frac{m}{s}$

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3 years ago

What usually causes high concentration of minerals to form

grandymaker [24]

Answer:during the evaporation of liquids salt, sugar, reference to evaporates the cooling of liquids saturated solution at high temperatures and pressures new crystals may grow in solid materials diamonds from coal, metamorphism

Explanation:

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3 years ago

You take a trip to Oklahoma City. The turnpike between Tulsa and OKC

laiz [17]

$speed_{avg} = \frac{Σ\:distance}{ total\: time}$

So, according to the question:

distance = 90 miles

time = 1h 45min + 15 min + 1h = 3h

$Therefore:\\ speed_{avg} = \frac{90}{3} mph \\ = \boxed {30 \: mph}$

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2 years ago

A hockey puck is hit so that it leaves the stick at 50.4m/s. If it takes 0.25 s for the puck to hit the boards, how far is the p

notka56 [123]

Speed = 50.4 m/s
Time = 0.25 s

Distance = (speed) x (time) = (50.4 m/s) x (0.25 s) = 12.6 meters.

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3 years ago

Starting from rest, a solid sphere rolls without slipping down an incline plane. at the bottom of the incline, what does the ang

vfiekz [6]

Starting from rest, a solid sphere rolls without slipping down an incline plane. at the bottom of the incline, what does the angular velocity of the sphere depend upon? check all that apply. check all that apply. the angular velocity depends upon the length of the incline. the angular velocity depends upon the mass of the sphere. the angular velocity depends upon the radius of the sphere. the angular velocity depends upon the height of the incline

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3 years ago