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3 years ago

PLEASE HELP!!!!!!!! FIRST TO ANSWER WILL GET BRAINLIEST!!!

Mathematics

1 answer:

liraira [26]3 years ago

3 0

Answer:

Step-by-step explanation:

A2+B2=C2

2(2)+2(2)=C2

4+4=C2

8=C2

C= About 2.8

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sveta [45]

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Step-by-step explanation:

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3 years ago

What is (9j+3)-(2j+6)

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3 years ago

1) What is the area of square of length 5cm?

ASHA 777 [7]

Answer:

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2 years ago

Write your answer as a product with a whole number <br><br> 45z + 72

notka56 [123]

Answer:

Step-by-step explanation:

Rewrite the whole numbers as multiplication.

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2 years ago

On a cold day, hailstones fall with a velocity of 2i − 6k m s−1 . If a cyclist travels through the hail at 10i m s−1 , what is t

Paraphin [41]

Answer:

The velocity of the hail relative to the cyclist is $V_{hc}=-8\hat{i}-6\hat{k}$

The angle at which hailstones falling relative to the cyclist is $\theta = 36.86^\circ$

Step-by-step explanation:

Given : On a cold day, hailstones fall with a velocity of $2\hat{i}-6\hat{k}\text{ m/s}$ . If a cyclist travels through the hail at $10\hat{i} \text{ m/s}$ .

To find : What is the velocity of the hail relative to the cyclist and At what angle are the hailstones falling relative to the cyclist?

Solution :

The velocity of the hailstone falls is $V_h=2\hat{i}-6\hat{k}\text{ m/s}$

The velocity of the cyclist travels through the hail is $V_c=10\hat{i} \text{ m/s}$

The velocity of the hail relative to the cyclist is given by,

$V_{hc}=V_h-V_c$

Substitute the value in the formula,

$V_{hc}=2\hat{i}-6\hat{k}-10\hat{i}$

$V_{hc}=-8\hat{i}-6\hat{k}$

So, The velocity of the hail relative to the cyclist is $V_{hc}=-8\hat{i}-6\hat{k}$

Now, The angle of hails falling relative to the cyclist is given by

$\theta = \tan^{-1}(\frac{-6}{-8})$

$\theta = \tan^{-1}(\frac{3}{4})$

$\theta = 36.86^\circ$

So, The angle at which hailstones falling relative to the cyclist is $\theta = 36.86^\circ$

4 0

3 years ago