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mr_godi [17]
3 years ago
15

Several common barometers are built using a variety of fluids. For which fluid will the column of fluid in the barometer be the

highest
Physics
1 answer:
saw5 [17]3 years ago
6 0

Answer:

the one in which the fluid has the lowest density

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A force of only 150 N can lift a 600 N sack of flour to a height of 0.50 m when using a lever as shown in the diagram below. a.
Snowcat [4.5K]
Actually the question is not clear. The Benefit of lifting using lever is that you can apply force in a convenient direction and you can use very less force to lift object by balancing the torque due to object.For example you want to lift a mass of 4N with a force 2N you can use a class 2 lever and maintain the ratio between the distances of the body and the point of application of force from the fulcrum to be 1:2.In any case balance the torque to get the required force.

8 0
3 years ago
A loop of wire is placed in a uniform magnetic field. Let ø be the angle between the direction of b and the normal. At which val
zaharov [31]

Answer:

B. 0 degrees

Explanation:

The magnetic flux through a certain area enclosed by a loop of wire immersed in a region with magnetic field is given by:

\Phi = B A cos \theta

where

B is the strength of the magnetic field

A is the area enclosed by the coil

\theta is the angle between the direction of the magnetic field and the direction of the normal to the coil

From the equation above, we see that the magnetic flux is maximum when

cos \theta=1

So when the field is parallel to the normal to the coil (so, when it is perpendicular to the coil), therefore when:

\theta=0^{\circ}

So, the correct option is

B. 0 degrees

5 0
4 years ago
A tennis ball bounces on the floor three times. If each time it loses 11% of its energy due to heating, how high does it rise af
aalyn [17]

Answer:

h = 3.10 m

Explanation:

As we know that after each bounce it will lose its 11% of energy

So remaining energy after each bounce is 89%

so let say its initial energy is E

so after first bounce the energy is

E_1 = 0.89 E

after 2nd bounce the energy is

E_2 = 0.89(0.89 E)

After third bounce the energy is

E_3 = (0.89)(0.89)(0.89)E

here initial energy is given as

E = mgH_o

now let say final height is "h" so after third bounce the energy is given as

E_3 = mgh

now from above equation we have

mgh = (0.89)(0.89)(0.89)(mgH)

h = 0.705H

h = 0.705(4.4 m)

h = 3.10 m

3 0
3 years ago
old stars obtain part of their energy by the fusion of three alpha particles to form a 12/6c nucleus, whose mass is 12.0000 u. H
marta [7]

Answer:

11.6532 x 10⁻¹¹ J or 7.3 MeV is given off

Explanation:

Mass of an alpha particle = 4.0026u,   ∴ mass of three = 12.0078u

Find the difference in mass.

Mass of three alpha - Mass of Carbon nucleus

12.0078u - 12u = 0.0078u

Since 1u = 1.66 x 10⁻²⁷ kg

Therefore, 0.0078u = 1.2948 x 10⁻²⁷

Now that we know Mass(m) = 1.2948 x 10⁻²⁷ and Speed (c) 3 x 10⁸ m²s⁻²

Formular for Energy ==> E₀ = mc²

E = (1.2948 x 10⁻²⁷) (3 x 10⁸ m²s⁻²)²

E = (1.2948 x 10⁻²⁷) (9 x 10¹⁶) J

E = 11.6532 x 10⁻¹¹ J

Or, if you need your energy in MeV

1 MeV = 1.60x10⁻¹³ J

Just do the conversion by dividing 11.6532 x 10⁻¹¹ J by 1.60x10⁻¹³ J

It will give you 7.3 MeV

7 0
3 years ago
Which part, A or B, captures, amplifies, and demodulates radio waves? _____
olga_2 [115]

Answer:

1. B

2. A

Explanation:

I just took it

8 0
3 years ago
Read 2 more answers
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