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3 years ago

What are the angles which the vector A=3i+6j makes with the cordinate axis

1 answer:

5 0

Find the angles which the vecotr v ⃗ =3i−6j+2k v→=3i−6j+2k makes with the coordinate axes.
If the angles are α,β,θ α,β,θ , show that for any 3-dimensional vector:
. . . cos 2 α+cos 2 β+cos 2 θ=1 cos2⁡α+cos2β+cos2⁡θ=1

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A 20 kg bicycle carrying a 50 kg

Misha Larkins [42]

Where's the question?

The weight of the bicycle will be 70kg which means that the bicycle has more friction to the ground.

7 0

3 years ago

At what temperature is the average kinetic energy of an atom in helium gas equal to 6.21 x 10-21 j?

NARA [144]

The average kinetic energy of an atom in helium gas at temperature T is given by,

K.E= $\frac{3}{2}KT$

here, K is botzmann constant =1.38×10⁻²³ m² kg s⁻² K⁻¹

Given, K.E= 6.21×10⁻²¹ J

Substituting the values,

$6.21*10^{-21}=\frac{3}{2}1.38*10^{-23}T$

T= 300 K

Therefore, at temperature 300 K the average kinetic energy of the atom in helium gas is 6.21×10⁻²¹ J.

5 0

4 years ago

When a force acts on an object from an angle other than either 0° or 180° to the direction of motion:

inn [45]

You must find the component of the force before calculating

4 0

3 years ago

In single-slit diffraction, what happens to the dark fringes if the slit gets wider?.

Reptile [31]

The spacing between the fringes does not depend on the width of the slit.

The light intensity produced by the slits increases with increased width of the slit. The screen thus develops brighter fringes as the slit width increases.

On the screen, coloured fringes will be created if the white light replaces monochromatic light.

<h3>What is diffraction?</h3>

Diffraction is the breaking up of an electromagnetic wave as it passes a geometric structure (e.g. a slit), followed by reconstruction of the wave by interference. Diffraction occurs for all types of waves, including sound waves.

Learn more about diffraction:

brainly.com/question/16749356

5 0

3 years ago

If the boy and his bike actually had a mass of 40 kg instead of 50 kg how much force would it take for him to accelerate at 0.8

klio [65]

Answer:

F = 32 [N]

Explanation:

To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

where:

F = forces applied [N] (units of Newtons)

m = mass = 40 [kg]

a = acceleration = 0.8 [m/s²]

Now replacing:

$F=m*a\\F = 40*0.8\\F = 32 [N]$

8 0

3 years ago