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Yuliya22 [10]
3 years ago
11

PLEASE HELP ME WITH THIS

Physics
1 answer:
Kitty [74]3 years ago
3 0

Answer:

i think it might be c but i know its not A or B and im

on the fence for D so the best answer would be C

Explanation:

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An element can be identified by _____.
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Answer:

The answer is the number of protons in its atom

Explanation:

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. Find the buoyant force exerted on a ball with radius of 2 meters, when the ball is entirely immersed in the water.
almond37 [142]

Explanation:

Buoyancy force is equal to the weight of the displaced fluid:

B = ρVg

where ρ is the density of the fluid,

V is the volume of the displaced fluid,

and g is the acceleration due to gravity.

The fluid is water, so ρ = 1000 kg/m³.

The volume displaced is that of a sphere with radius 2 m:

V = 4/3 π r³

V = 4/3 π (2 m)³

V ≈ 33.5 m³

The buoyancy force is therefore:

B = (1000 kg/m³) (33.5 m³) (9.8 m/s²)

B ≈ 328,400 N

Round as needed.

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3 years ago
Efficiency of a machine is lesser than 100% , Why?
astra-53 [7]

Answer:

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4 0
3 years ago
A cosmic ray proton moving toward the Earth at 3.5x 10^7 ms experiences a magnetic force of 1.65x 10^-16 N. What is the strength
Step2247 [10]

Answer:

Magnetic field, B=4.16\times 10^{-5}\ T

Explanation:

It is given that,

Velocity of proton, v=3.5\times 10^7\ m/s

Magnetic force, F=1.65\times 10^{-16}\ N

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We need to find the strength of the magnetic field if there is a 45° angle between it and the proton's velocity. The formula for magnetic force is given by :

F=qvB\ sin\theta

B=\dfrac{F}{qv\ sin\theta}

B=\dfrac{1.65\times 10^{-16}}{1.6\times 10^{-19}\times 3.5\times 10^7\times sin(45)}

B = 0.0000416 T

B=4.16\times 10^{-5}\ T

Hence, this is the required solution.

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Answer:

When an air particle bombards a smoke particles, the smoke particle moves to the same direction as the air particle that hit it. When another air particle hits the smoke particle, it changes its direction to that of the second air particle, and so on. This is called Brownian motion.

5 0
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