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3 years ago

Which of the following measurements involve a direction? ( select all that apply)

Physics

2 answers:

kiruha [24]3 years ago

6 0

Answer:

Explanation:which of the following measurements involve a direction? ( select all that apply)

gavmur [86]3 years ago

5 0

The answer is A, D (Apex)

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Which one of the following types of microscope gives the highest amount of magnification?

insens350 [35]

"SEM" or Scanning Electron Microscope is the one among the following choices given in the question that gives the highest amount of magnification. The correct option among all the options that are given in the question is the fourth option or the last option. I hope the answer has come to your help.

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4 years ago

Read 2 more answers

What is the net force needed to lift a full grocery sack weighing 210N uniformly?

Alex

If the sack weighs 210 newtons, then an upward force of 210 newtons
exactly cancels the downward force of gravity, and makes the net vertical
force on the bag zero.

ANY upward force that's greater than 210 newtons makes the net force
act upward on the bag, and causes it to accelerate upward.

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3 years ago

List the three classes of rock and name a specific rock that goes with that class

Vsevolod [243]

Metamorphosis that's all I know

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4 years ago

The formula h = -16t squared + 64t squared gives the height, h, and time, t, of an object launched from the ground with a speed

padilas [110]

Answer:

Details in the explanation

Explanation:

Vertical Launch

When an object is thrown vertically in free air (no friction), it moves upwards at its maximum speed while the acceleration of gravity starts to brake it. At a given time and height, the object stops in mid-air and starts to fall back to the launching point until reaching it with the same speed it was launched.

We are given an expression for the height of an object in function of time t

$h = -16t^2 + 64t$

Please note we have deleted the second 'squared' from the formula since it's incorrect and won't describe the motion of vertical launch.

We now have to evaluate h for the following times, assuming h comes in feet

At t=1 sec

$h = -16(1)^2 + 64(1)=64-16=48\ ft$

The object is at a height of 48 feet

At t=2 sec

$h = -16(2)^2 + 64(2)=128-64=64\ ft$

The object is at a height of 64 feet. This is the maximum height the object will reach, as we'll see below

At t=3 sec

$h = -16(3)^2 + 64(3)=192-144=48\ ft$

The object is at a height of 48 feet. We can clearly see it's returning from the maximum height and is going down

At t=4 sec

$h = -16(4)^2 + 64(4)=256-256=0\ ft$

The object is at ground level and has returned to the launch point.

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3 years ago

Estimate and determine the order of magnitude of the circumference of the Earth in miles and the speed of a sailboat in miles pe

solmaris [256]

Answer:

= 1000 hours

Explanation:

Earth's circumference is 10⁴ mile

speed of a sailboat is 10¹ mile/hour

distance = speed × time

10⁴ = 10¹ × t

t = 10⁴ / 10¹

t = 10³

= 1000 hours

4 0

3 years ago