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3 years ago

An object buoyant force and wieght arent the smae thing

Physics

1 answer:

Alona [7]3 years ago

7 0

I hope this is true or false

The answer would be TRUE

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A 50-cm wire placed in an east-west direction is moved horizontally to the north with a speed of 2.0 m/s. the horizontal compone

Strike441 [17]

When a wire is moved inside uniform magnetic field then its free electrons will experience magnetic force on it due to which wire will have potential difference at its ends.

Now here we will have magnetic field due to earth and wire is moving in this constant field so induced emf is given by formula

$EMF = v.(B x L)$

given that

$B = 25\mu Tj - 50\mu Tk$

$v = 2 m/s j$

$L = 0.50 m (-i)$

now by using the above formula we will have

$EMF = 2(j) .(25\mu j - 50\mu k) x (-0.50 i)$

$EMF = 2(j) .(12.5\mu k + 25\mu j)$

$EMF = 50 \mu Volts$

5 0

3 years ago

Read 2 more answers

When two objects are near each other, how would increasing one object’s mass affect it?

worty [1.4K]

Answer:

Explanation

8 0

3 years ago

Read 2 more answers

A car has a weight of 25000 N and its brakes can apply a maximum force of 628 N to stop it. The car is initially moving at a spe

svlad2 [7]

Time required : 25.876 s

<h3>Further explanation</h3>

Given

A car weight = 25000 N

Brake force = 628 N

vo= 6.5 m/s

vt = 0(stop)

Required

time to stop

Solution

W = m . g

25000 = m.10

m=2500 kg

Newton's second law

F = m . a

628 = 2500 . a

$\tt a=\dfrac{628}{2500}=0.2512~m/s^2$

vt=vo-at(deceleration a=-)

0=6.5-0.2512.t

0.2512.t=6.5

t=25.876 s

5 0

3 years ago

A car traveling south is 200 kilometers from its starting point after 2 hours. What is the average velocity of the car?

Oksi-84 [34.3K]

Explanation:

Total displacement = 200 km

Total time taken = 2 hour...

Now...

$average \: velocity \: = \frac{total \: displacement}{total \: time \: taken \: } \\$

$= \frac{200}{2} \\$

= 100 kilometers/hour south

5 0

2 years ago

A pulsed proton beam is fired at a target. Each pulse lasts 45.0 ns, and there are protons in each pulse, each proton having a s

skelet666 [1.2K]

Answer:

P = n P₀ 4.9 10¹⁴ Pa

Explanation:

The radiation pressure for full absorption is

P = S / c

Where S the pointing vector, which is equal to the intensity of the beam that is defined as the energy per unit area per unit time

The energy of the protons can be calculated

Em = K = ½ m v²

Area

A = π r²

Intensity is

I = n ½ m v² / π r²

I = ½ n m /π v² / r²

We replace

S = U / t A

S = ½ n m /π v² / r² Δt

The pressure is

P = 1/c (½ n m /π (v / r Δt)²2

Δt = 45 10⁻⁹ s

P = n [½ m /πc (v/r)²] 4.9 10¹⁴

The amount in square brackets is the pressure that a proton creates, which is why it is useful

P = n P₀ 4.9 10¹⁴ Pa

Where Po is the pressure created by a proton

4 0

4 years ago