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3 years ago

In all collisions, both elastic and inelastic, which quantity must be conserved?

Physics

1 answer:

Paraphin [41]3 years ago

4 0

Answer:

Momentum is conserved.

All of the others are not conserved because of heat loss caused by deformation, etc.

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A baseball player exerts a force of 100 N on a ball for a distance of 0.5 mas he throws it. If the ball has a mass of 0.15 kg, w

Aloiza [94]

Answer:

25.82 m/s

Explanation:

We are given;

Force exerted by baseball player; F = 100 N

Distance covered by ball; d = 0.5 m

Mass of ball; m = 0.15 kg

Now, to get the velocity at which the ball leaves his hand, we will equate the work done to the kinetic energy.

We should note that work done is a measure of the energy exerted by the baseball player.

Thus;

F × d = ½mv²

100 × 0.5 = ½ × 0.15 × v²

v² = (2 × 100 × 0.5)/0.15

v² = 666.67

v = √666.67

v = 25.82 m/s

4 0

3 years ago

Red light of wavelength 633 nm from a helium-neon laser passes through a slit 0.370 mm wide. The diffraction pattern is observed

erica [24]

Answer:

Δx = 6.33 x 10⁻³ m = 6.33 mm

Explanation:

We can use the Young's Double Slit Experiment Formula here:

$\Delta x = \frac{\lambda L}{d}\\\\$

where,

Δx = distance between consecutive dark fringes = width of central bright fringe = ?

λ = wavelength of light = 633 nm = 6.33 x 10⁻⁷ m

L = distance between screen and slit = 3.7 m

d = slit width = 0.37 mm = 3.7 x 10⁻⁴ m

Therefore,

$\Delta x = \frac{(6.33\ x\ 10^{-7}\ m)(3.7\ m)}{3.7\ x \ 10^{-4}\ m}$

8 0

3 years ago

A car rolls backward from -2 to -10 m/s in 4 seconds. what is the acceleration. PLEASE HELP WILL GIVE BRAINLIEST

pashok25 [27]

$\bf \underline{Given : }$

Initial velocity,u = -2 m/s

Final velocity,v = -10 m/s

Time taken, t = 4 seconds

$\bf \underline{To \: find \: out : }$

Find the acceleration ( a ) .

$\bf \underline{Solution : }$

We know that,

$\sf \: Acceleration = \dfrac{v - u}{t}$

Substituting the values in the above formula, we get

$\implies \sf \: Acceleration = \dfrac{ - 10 - ( - 2)}{4}$

$\implies\sf \: Acceleration = \dfrac{ - 10 + 2}{4}$

$\implies \sf \: Acceleration = \cancel \dfrac{ - 8}{4}$

$\implies\sf \: Acceleration = - 2 \: ms {}^{ - 2}$

Hence,the acceleration of a body is -2 m/s².

5 0

4 years ago

What is a main component of steel

nikklg [1K]

I think the main component is iron

8 0

3 years ago

Which terms refer to the smallest pure substances? A. mixtures and alloys B. molecules and atoms C. elements and isotopes D. met

MariettaO [177]

B. molecules and atoms

7 0

3 years ago