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Katarina [22]
3 years ago
14

A 2.0-kg block is on a perfectly smooth (frictionless) ramp that makes an angle of 30^\circ30 ​∘ ​​ with the horizontal. What is

the force of the ramp on the block?

Physics
1 answer:
Nastasia [14]3 years ago
7 0

Answer:

Explanation:

Since the surface is frictionless therefore there will be no friction force on block but there will be weight of block which we can divide in to two components i.e. mgcosθ &mgsinθ which is perpendicular and parallel to the surface respectively.

In response to mgcosθ ramp will apply a normal force to the block which will be of equal magnitude to that of mgcosθ.

Therefore Ramp will apply a Force of mgcosθ on block where m is the mass of block.

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"Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water. Sedimentation is the collective name for processes that cause mineral and/or organic particles (detritus) to settle and accumulate or minerals to precipitate from a solution."
7 0
2 years ago
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A gas in a sealed container has a pressure of 50 kPa at 27°C. What will the pressure of the gas be if the temperature rises to 8
alexgriva [62]

Answer:

the final pressure of the gas is 60 kPa.

Explanation:

Given;

initial pressure of the gas, P₁ = 50 kPa = 50,000 Pa

initial temperature of the gas, T₁ = 27⁰ C = 27 + 273 = 300 k

final temperature of the gas, T₂ = 87⁰ C = 87 + 273 = 360 K

Let the final pressure of the gas = P₂

Apply pressure law;

\frac{P_1}{T_1} = \frac{P_2}{T_2} \\\\P_2 = \frac{P_1T_2}{T_1} = \frac{50,000 \times 360}{300}  = 60,000 \ Pa = 60 \ kPa

Therefore, the final pressure of the gas is 60 kPa.

4 0
3 years ago
Based on the diagram of the two electrical circuits, assuming the lightbulbs are all identical, which circuit will draw more pow
pochemuha
In series connection  in orde to find the total resistance we add all the resistance capacity but in parallel, we take the 1/R  and resistance = V  hence the series connection takes up more power,
8 0
3 years ago
A school bus moves at speed of 35mi/he for 20miles. How long will it take for the bus to get to school
lara [203]

Answer:

Time, t = 0.57 hours

Explanation:

It is given that,

Speed of the school bus, v = 35 mi/hr

Distance covered by the bus, d = 20 miles

We need to find the time taken by the bus to get to school. Time taken by the bus is given by :

t = 0.57 hours

So, the time taken by the bus to reach school is 0.57 hours. Hence, this is the required solution.

8 0
2 years ago
EMF. Currents in dc transmission lines can be 100 A or more. Some people have expressed concern that the electromagnetic fields
mrs_skeptik [129]

Answer:

The magnetic field B of the transmission line is 4.5·10^(-6)T. The ratio B/Be is 0.0009% (there is no risk to human health)

Explanation:

we will consider a dc transmission line as an infinite longitudinal line in the Z-axis with a dc current of 180 A. To solve the problem we will use ampere's law. We can consider the geometry of the problem (Rotational symmetry in respect of Z-axis) than the field B is annular with center in the transmission line.

\vec{B}(r,\varphi,z)=B(r)\vec{\varphi}

\displaystyle\oint_{C} \vec{B}(r)\,\vec{dl}=\mu I_c

We will use a circular amperian curve C. Therefore:

\displaystyle\oint_{C} \vec{B}(r)\,\vec{dl}=\int_{0}^{2\pi} B(r)\vec{\varphi}\,\vec{\varphi}rd\varphi=B(r)r\int_{0}^{2\pi} \,d\varphi=B(r)r2\pi=\mu I_c

B(r)=\displaystyle\frac{\mu 180A}{r2\pi}

For a height of 8.0m (r=8m):

B(8m)=\displaystyle\frac{\mu 180A}{8m2\pi}=4.5\cdot10^{-6}T

Compared to the earth magnetic field:

\displaystyle\frac{B}{B_e}\%= \frac{B}{B_e}100=0.0009\%

6 0
3 years ago
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