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Ksju [112]
3 years ago
5

Can someone do 2-5 for me please

Physics
1 answer:
Alex_Xolod [135]3 years ago
4 0

Explanation:

2. momentum(p) = mass*velocity

Force(F)=mass*acceleration

Inertia is the tendecy of an object to resist changes to its state.

4. F= ma

50kg*15m/s2 =750N

5.F=ma

10kg * 3m/s2 =30N

6. P=mv

10kg * 3m/s =30 kg.m/s

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If 61.4 cm of copper wire (diameter = 1.08 mm, resistivity = 1.69 × 10-8Ω·m) is formed into a circular loop and placed perpendic
harkovskaia [24]

Answer:

the thermal energy generated in the loop = 6.64*10^{-4}  \ W

Explanation:

Given that;

The length of the copper wire L = 0.614 m

Radius of the loop  r = \frac{L}{2 \pi}

r = \frac{0.614}{2 \pi}

r = 0.0977 m

However , the area of the loop is :

A_L = \pi r^2

A_L = \pi (0.0977)^2

A_L = 0.02999 \ m^2

Change in the magnetic field is \frac{dB}{dt}= 0.0914 \ T/s

Then the induced emf e = A_L \frac{dB}{dt}

e = 0.02999 * 0.0914

e = 2.74 × 10⁻³ V

resistivity of the copper wire \rho = 1.69* 10^{-8} Ω m

diameter of the wire = 1.08 mm

radius of the wire = 0.54 mm = 0.54 × 10⁻³  m

Thus, the resistance of the wire  R = \frac {\rho L}{\pi r^2}

R =  \frac{(1.69*10^{-8})(0.614)}{   \pi (0.54*10^{-3})^2}

R = 1.13× 10⁻² Ω

Finally,  the thermal energy generated in the loop (i.e the power) = \frac{e^2}{R}

= \frac{(2.74*10^{-3})^2}{1.13*10^{-2}}

= 6.64*10^{-4}  \ W

8 0
3 years ago
Earth is slightly closer to the sun in january than in july. How does the area swept out by earth’s orbit around the sun during
Anna007 [38]

This is because both areas are the same.

8 0
3 years ago
Four hundred seventy joules of heat are removed from a heat reservoir at a temperature of 470 K. What is the entropy change of t
11111nata11111 [884]

Answer:

ΔS= -1 J/K

Explanation:

Given data

Heat Q= -470J

Temperature T=470 K

To find

Entropy change ΔS

Solution

We know that the entropy change of system is ΔS is given by

ΔS=Q/T

We have take heat value Q as negative because the heat is removed from heat reservoir

So

ΔS=(-470J/470K)

ΔS= -1 J/K

8 0
3 years ago
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Please answer this fast <br>I 'll marks them brainliest answer <br>​
Reptile [31]

answer

64 is C (c) 1-Bromo-3-methylbutane

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8 0
3 years ago
The wave property that is related to the height of a wave is the
DedPeter [7]

Answer:

Amplitude

Explanation:

The amplitude is maximum height a wave is measured from its rest position.

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