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insens350 [35]
3 years ago
15

3.The space heater in a room does not have a fan, but after a few minutes you feel warm air moving by you. What type of energy t

ransfer?
Physics
1 answer:
Natali [406]3 years ago
6 0
Heat transfer

Have a good day
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Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tig
TEA [102]

Answer:I=2.27\times 10^3 A

Explanation:

Given

Magnetic Field Strength B=1.5 T

Length of solenoid L=1.8 m

Diameter of Solenoid D=75 cm

diameter of wire d=1.90 mm

No of turns N=\frac{Length\ of\ solenoid}{diameter\ of\ wire}

N=\frac{1.8}{1.90\times 10^{-3}}=947.36 turns

Magnetic Field is given by

B=\frac{\mu _0NI}{L}

where \mu _0=magnetic\ permeability\ of\ free\ space=4\pi \times 10^{-7}

I =current

Thus I=\frac{BL}{\mu _0N}

I=\frac{1.5\times 1.8}{4\pi \times 10^{-7}\times 947.36}

I=2270 A

I=2.27\times 10^3 A

6 0
3 years ago
A meteoroid is moving towards a planet. It has mass m= 0.18x10⁹ kg and speed v1 = 5.9x10⁷ m/s at distance R1 = 2.9x10⁷ m from th
anzhelika [568]

Answer:

5.90000114e+7 m/s

Explanation:

Given values

M₁ = 1.8e+8 kg

M₂ = 2.4e+25 kg

M = M₁ + M₂ = 2.400000000000000018e+25 kg

G = 6.6743e-11 m³ kg⁻¹ sec⁻²

GM = 1.60183200000000001201374e+15 m³ sec⁻²

r₁ = 2.9e+7 m

v₁ = 5.9e+7 m/s

R = 2.2e+6 m

The total energy of the meteroid per unit mass at time t₁ is

E/M₁ = 0.5v₁² − GM/r₁ = 1.7404999447644137931034478615952e+15 m²/s²

At impact,

E/M₁ = 0.5v₂² − GM/R = 1.7404999447644137931034478615952e+15 m²/s²

v₂ = √[2(E/M₁ + GM/R)] = 5.9000011404572937396882314817886e+7 m/s

v₂ − v₁ ≈ 11.4 m/s

4 0
3 years ago
Describe the two main factors that influence the path of surface currents. Describe how water goes through the hydrolic cycle, s
marin [14]

Answer: Surface currents can flow for thousands of kilometers and can reach depths of hundreds of meters. These surface currents do not depend on weather; they remain unchanged even in large storms because they depend on factors that do not change. Surface currents are created by three things: global wind patterns, the rotation of the Earth, and the shape of the ocean basins.    I don't know if this is right.....

Explanation:

The hydrologic cycle is the process, powered by the sun's energy, which moves water between the oceans, the sky, and the land. We can start our examination of the hydrologic cycle with the oceans, which hold over 97% of the planet's water.

4 0
3 years ago
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Do electromagnetic waves travel through a medium
vladimir1956 [14]
No, they actually travel through the vacuum of outer space, but it also requires the absence of a material sedium.
3 0
4 years ago
A thesis statement is to a reader as _______ is to _________, it lets her know where the writer will take her.
nalin [4]
The most probably answer among the presented options would be the one that says "road map is to passenger".

Let us establish first that we do not know what a thesis statement means and that we are just taking the statement as it is without any prior knowledge to the hard word present. The key to this would be the statement "it lets her know where the writer will take her." Among the ones presented as options, only the road map fits the description. Thus, the answer being road map is to passenger. The car is subject to the driver's commands thus the driver is the one guiding the car, and the student follows what is written in the study guide.
7 0
4 years ago
Read 2 more answers
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