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3 years ago

At a certain location the horizontal component of the earth's magnetic field is

1 answer:

6 0

At a certain location, the horizontal component of the earth’s magnetic field is, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight.

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Which of the following cells is responsible for storing excess nutrients? A. muscle B. adipose c. reproductive d. epithelial

lesantik [10]

The answer is B adipose

7 0

3 years ago

Read 2 more answers

A U-shaped tube with both arms open to the air has a 43.0 cm column of liquid of unknown density in its right arm. Beneath this

puteri [66]

Answer:

$\delta_x=732.5581395 \approx 737.56kh/m^3$

Explanation:

From the question we are told that

Height of unknown liquid $h_1= 43.0cm =0.43m$

Height of glycerin $h_2= 18.0cm =0.18m$

Generally at equal levels of liquid pressure

$P_1=P_2$

Therefore

$\delta_gh_1=\delta_gh_2$

$\delta g=Density\ of \ glycerin=>1260kg/m^3$

Therefore

$\delta_g=\frac{\delta_gh_2}{h_1}$

$\delta_x=\frac{1260*0.43-0.18}{0.43}$

The Density of the unknown liquid is given by

$\delta_x=732.5581395 \approx 737.56kh/m^3$

8 0

2 years ago

(b) The efficiency of the pump which operates the fountain is 70%.

ruslelena [56]

Answer:

Power supplied to the pump is 980000 W or 980 KW

Note: The question is incomplete. The complete question is given below:

On a day with no wind, a fountain in Switzerland propels 30000 kg of water per minute to a height of 140 metres.

a)Calculate the power used in raising the water?

b)The efficiency of the pump which operates the fountain is 70%

calculate the power supplied to the pump?

Explanation:

Efficiency = Power output/Power input * 100%

Power output = work done/ time

where work done = mass * acceleration due to gravity (g) * height

time = 1 minute = 60 seconds

mass of water = 30000 kg, height = 140 meters, g = 9.8 m/s²

Then, work done = 30000 * 140 * 9.8 = 41160000 J

Power output then = 41160000 J / 60 s

Power output = 686000 W

The power input can then be derived from the formula of efficiency

Power input = (Power output * 100)/Efficiency

Power input = (100 * 686000) / 70

Power input = 980000 W

Therefore, power supplied to the pump is 980000 W or 980 KW

8 0

3 years ago

A layer of liquid B floats on liquid A. A ray of light begins in liquid A and undergoes total internal reflection at the interfa

amm1812

Answer:

0.737

Explanation:

$n_{A}$ = Refractive indices of liquid A

$n_{B}$ = Refractive indices of liquid B

$n_{C}$ = Refractive indices of liquid C

Consider the total internal reflection at interface of liquid A and liquid B

$\theta_{i}$ = Angle of incidence = 32.0

Using Snell's law for total internal reflection

$n_{A} Sin\theta_{i} = n_{B} \\n_{B} = n_{A} Sin32$

Consider the total internal reflection at interface of liquid A and liquid C

$\theta_{i}$ = Angle of incidence = 46

Using Snell's law for total internal reflection

$n_{A} Sin\theta_{i} = n_{C} \\n_{C} = n_{A} Sin46$

Ratio is hence given as

$Ratio = \frac{n_{B}}{n_{C}} = \frac{n_{A} Sin32}{n_{A} Sin46} = \frac{Sin32}{Sin46}\\Ratio = 0.737$

7 0

3 years ago

Three identical 6.0-kg cubes are placed on a horizontal frictionless surface in contact with one another. The cubes are lined up

Aliun [14]

Answer:

24 Newtons

Explanation:

The force exerted in the middle cube needs to be enough to move the middle cube and the right cube with an acceleration of 2 m/s2.

The mass of those two cubes combined is 6 + 6 = 12 kg

So, using the following equation, we can find the force:

Force = mass * acceleration

Force = 12 * 2

Force = 24 Newtons

6 0

2 years ago