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3 years ago

Calculate the average speed of a runner that travels 200 meters in 40 seconds.

Physics

2 answers:

balandron [24]3 years ago

7 0

$\langle \text{speed} \rangle =\dfrac{\text{total DISTANCE travelled}}{\text{total time taken}}$

GarryVolchara [31]3 years ago

3 0

Answer:we can calculate the answer by this formula;

Explanation:

V=S/t

V=200/40

V=5m/s

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Suppose you are drinking root beer from a conical paper cup. The cup has a diameter of 10 centimeters and a depth of 13 centimet

sveta [45]

Answer:

The level of the root beer is dropping at a rate of 0.08603 cm/s.

Explanation:

The volume of the cone is :

$V=\frac {1}{3}\times \pi\times r^2\times h$

Where, V is the volume of the cone

r is the radius of the cone

h is the height of the cone

The ratio of the radius and the height remains constant in overall the cone.

Thus, given that, r = d / 2 = 10 / 2 cm = 5 cm

h = 13 cm

r / h = 5 / 13

r = {5 / 13} h

$V=\frac {1}{3}\times \frac {22}{7}\times ({{{\frac {5}{13}\times h}}})^2\times h$

$V=\frac {550}{3549}\times h^3$

Also differentiating the expression of volume w.r.t. time as:

$\frac {dV}{dt}=\frac {550}{3549}\times 3\times h^2\times \frac {dh}{dt}$

Given: $\frac {dV}{dt}$ = -4 cm³/sec (negative sign to show leaving)

h = 10 cm

So,

$-4=\frac{550}{3549}\times 3\times {10}^2\times \frac {dh}{dt}$

$\frac{55000}{1183}\times \frac {dh}{dt}=-4$

$\frac {dh}{dt}=-0.08603\ cm/s$

<u>The level of the root beer is dropping at a rate of 0.08603 cm/s.</u>

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2 years ago

A plane is going at a speed of 300 km/h at 63 W of N. The wind hits the plane at a direction of 65 km/h at 52 S of E. What is th

katovenus [111]

It’s around the g force so it’s gonna be around 54 km/h

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Vinvika [58]

Answer:

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2 years ago

What is the difference between the formation of an ionic bond and formation of a covalent bond?

Vikentia [17]

Answer:

Answer to the question:

Explanation:

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