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2 years ago

What is true about warming up?

Physics

1 answer:

Alja [10]2 years ago

5 0

Answer:

D. All of the above

Explanation:

I would know cuz I'm in Track. Hope this helped, Have a Great Day!!

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What do our ears do

andre [41]

Answer:

hear

Explanation:

stuff stuff moaning and stuff

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2 years ago

Read 2 more answers

4. Three methods that people use are:

Mila [183]

The answers to question 4 d

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2 years ago

A hot air balloon is traveling vertically upward at a constant speed of 4.5 m/s. When it is 28 m above the ground, a package is

ella [17]

Answer:

1.97 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

$s=ut+\frac{1}{2}at^2\\\Rightarrow 21=4.5t+\frac{1}{2}\times -9.8\times t^2\\\Rightarrow 21=-4.5t-4.9t^2\\\Rightarrow 4.9t^2+4.5t-28=0\\\Rightarrow 49t^2+45t-280=0$

Solving the above equation we get

$t=\frac{-45+\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}, \frac{-45-\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}\\\Rightarrow t=1.97, -2.89$

So, the time the package was in the air is 1.97 seconds

3 0

3 years ago

Dierdre drew a diagram to compare the three types of mirrors.

Sholpan [36]

Labels that belong in the marked ares X, Y & Z include;

X: Curves outward

Y: Image may be smaller than object

Z: Image is always virtual

Since the rays never meet, the images formed by convex mirrors are always virtual and smaller than the object, and since they are smaller, the images appear to be further than they actually are.

8 0

3 years ago

Second and third class levers are differentiated by __________. a. the location of the fulcrum b. the location of the load c. th

strojnjashka [21]

Answer:

the answer is b

Explanation:

Second and third class levers are differentiated by the location of the load.

Hope this help you out and have a nice day =)

5 0

2 years ago