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antoniya [11.8K]
3 years ago
9

True or false. Atoms of a given element will have the same mass.

Physics
1 answer:
jarptica [38.1K]3 years ago
4 0

Answer:

True

Explanation:

Atoms of the same element will always have the same atomic mass or the mass listed in the periodic table.

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how do i.... Find the angle between each pair of vectors below. (1 point each) a. a = 2x + 3y a = 4x + 2y
Shalnov [3]

Recall that the dot product between two vectors \mathbf a and \mathbf b satisfies

\mathbf a\cdot\mathbf b=\|\mathbf a\|\|\mathbf b\|\cos\theta

where \|\mathbf x\| denotes the norm of a vector \mathbf x, and \theta is the angle between the two vectors.

So if \mathbf a=(2,3) and \mathbf b=(4,2), then

(2,3)\cdot(4,2)=\|(2,3)\|\|(4,2)\|\cos\theta

\implies2\cdot4+3\cdot2=\sqrt{2^2+3^2}\sqrt{4^2+2^2}\cos\theta

\implies\cos\theta=\dfrac{14}{\sqrt{13}\sqrt{20}}

\implies\theta\approx29.7^\circ

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3 years ago
Calculate the average speed at 5hrs
Oksanka [162]
Distance/ time = 100/5 = 20 km per hour

The average speed at 5hrs is 20 km per hour.

3 0
2 years ago
A block of mass
Gennadij [26K]

(a) The work done by the applied force is 26.65 J.

(b) The work done by the normal force exerted by the table is 0.

(c) The work done by the force of gravity is 0.

(d) The work done by the net force on the block is 26.65 J.

<h3>Work done by the applied force</h3>

W = Fdcosθ

W = 14 x 2.1 x cos25

W = 26.65 J

<h3>Work done by the normal force</h3>

W = Fₙd

W = mg cosθ x d

W = (2.5 x 9.8) x cos(90) x 2.1

W = 0 J

<h3>Work done force of gravity</h3>

The work done by force of gravity is also zero, since the weight is at 90⁰ to the displacement.

<h3> Work done by the net force on the block</h3>

∑W = 0 + 26.65 J = 26.65 J

Thus, the work done by the applied force is 26.65 J.

The work done by the normal force exerted by the table is 0.

The work done by the force of gravity is 0.

The work done by the net force on the block is 26.65 J.

Learn more about work done here: brainly.com/question/8119756

#SPJ1

6 0
2 years ago
how do you get a snake out of your boot? This is very serious! I have a garden snake in my new boots.
stepan [7]
Take Off Your Boot, And Shake Your Boot 
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4 years ago
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A 0.080-kg egg test dummy is fitted with a helmet and attached to a swing. This egg test dummy is pulled back and released, allo
BabaBlast [244]

Answer:

7.8 N

Explanation:

Applying,

I = Ft................. Eqaution 1

Where I = Impulse on the egg test dummy, F = Force on the egg test dummy during the time interval, t = time interval

make F the subject of the equation

F = I/t.................. Equation 2

From the question,

Given: T = -0.39 N.s, t = 0.050 s

Substitute these vales into equation 2

F = -0.39/0.050

F = -7.8 N

Hence the force that act on the egg test dummy is 7.8 N

6 0
3 years ago
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