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Elden [556K]
3 years ago
11

Two balls, A and B are thrown at the same angle above horizontal, but initial velocity of ball A is two times greater than initi

al velocity of ball B. Ignore air resistance. We can conclude that maximum height reached by ball A is (section 4.3) two times maximum height reached by B greater than maximum height reached by B, but we don't have enough information to give exact answer. four times the maximum height reached by B same as maximum height reached by B
Physics
1 answer:
skelet666 [1.2K]3 years ago
8 0

Answer:

Explanation:

Let the initial velocity of A and B be  2U₁ and U₁ at a common angle of θ.

At maximum height H  , Velocity v =0

For vertical  displacement

Vertical component = U₁ Sinθ and

v² = u² - 2gH

H = u² / 2g

H₁ = (2U₁ sinθ)² /  2g

H₂ = (U₁ sinθ)² / 2g

H₁ /H₂ = 4/1

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k0ka [10]
The answer would be carbon
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3 years ago
A balloon filled with helium gas has an average density of rhob = 0.22 kg/m3. The density of the air is about rhoa = 1.23 kg/m3.
MissTica

Answer:

a=g\left(\frac{\rho_a}{\rho_b}-1\right)

45.03681 m/s²

Explanation:

F_b = Buoyant force

W = Weight of the balloon

\rho_a = Density of air = 1.23 kg/m³

\rho_b = Density of balloon = 0.22 kg/m³

v_a = Volume of air

v_b = Volume of balloon

F_b=\rho_av_bg

W=\rho_bv_bg

g = Acceleration due to gravity = 9.81 m/s²

The net force acting on the balloon is

F=F_b-W\\\Rightarrow F=\rho_av_bg-\rho_bv_bg\\\Rightarrow \rho_bv_ba=\rho_av_bg-\rho_bv_bg\\\Rightarrow \rho_bv_ba=v_bg(\rho_a-\rho_b)\\\Rightarrow a=\frac{g}{\rho_b}(\rho_a-\rho_b)\\\Rightarrow a=g\left(\frac{\rho_a}{\rho_b}-1\right)

The equation is a=g\left(\frac{\rho_a}{\rho_b}-1\right)

a=g\left(\frac{\rho_a}{\rho_b}-1\right)\\\Rightarrow a=9.81\times \left(\frac{1.23}{0.22}-1\right)\\\Rightarrow a=45.03681\ m/s^2

The acceleration of the balloon is 45.03681 m/s²

8 0
3 years ago
A copper sphere was moving at 25 m/s when it hit another object. this caused all of the ke to be converted into thermal energy f
muminat

ΔT= 81°C  was the increase in temperature.

<h3>steps</h3>

As evidenced by energy conservation

To increase its temperature, all of its kinetic energy will be converted to thermal energy.

\frac{1}{2}mv ^{2} = msΔT

then divide both sides by the object's mass.

\frac{1}{2} v^{2} =sΔT

therefore, a temperature shift is described as

ΔT= V^{2} /2s

ΔT= 25^{2}/ 2 x 387

ΔT= 81°C

ΔT= 81°C  was the increase in temperature.

learn more about increase in temperature here

<u>brainly.com/question/14319779</u>

#SPJ4

3 0
1 year ago
1.20 Newton force is working on a 250 gram object. What is the acceleration?
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Answer:

The answer is B

Explanation:

250g = 0.25kg

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