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melamori03 [73]
3 years ago
6

Someone please help me! And I will mark you as brainlist!!

Physics
1 answer:
Gnoma [55]3 years ago
3 0

Answer:

Explanation:

PE = mgh = 2.0(9.8)(1.2) = 23.52 ≈ 24 J

Translation kinetic energy is defined as the energy of a system due to the motion of the system’s...center of mass

KE = ½mv² = ½(45)(1800/600)² = 202.5 ≈ 203 J  

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Explain how muscles are effected by space travel
sleet_krkn [62]
Hopes this helps:

Answer: Because astronauts work in a weightless environment, very little muscle contraction is needed to support their bodies or move around.
Without regular use and exercise our muscles weaken and deteriorate. It’s a process called atrophy.

Have a great day.
3 0
3 years ago
In some proton accelerators, proton beams are directed toward each other for head-on collisions. Suppose that in such an acceler
ipn [44]

Answer:

a) 0.9995c

b) 5641MeV

c) 91670 MeV

Explanation:

(a) The speed of approach is given by the formula:

u=\frac{v_1+v_2}{1+\frac{v_1v_2}{c}}=\frac{2(0.9898c)}{1+\frac{(0.9898)^2c^2}{c^2}}=0.99995c

(b) the kinetic energy is given by:

E_k=m_0c^2[\frac{1}{\sqrt{1-\frac{v^2}{c^2}}}-1]

by replacing c=3*10^8m/s, m_0=1.67*10^{-27}kg we obtain:

E_k=5641MeV

(c) in the rest frame of the other proton we have:

E_k=m_0c^2[\frac{1}{\sqrt{1-\frac{u^2}{c^2}}}-1]

by replacing we get

E_k=91670MeV

hope this helps!!

7 0
3 years ago
A 645-turn coil with a 20.250 m ​2 ​​ area is spun in Earth’s 5.00×10 ​−5 ​​ T magnetic field, producing a 1.25-V maximum emf. A
Dmitriy789 [7]

Answer:

\omega = 1.914\ rad/s

Explanation:

Given,

Number of turns, N = 645 N

Area, A = 20.25 m²

Earth Magnetic field, B = 5 x 10⁻⁵ T

Maximum Emf = 1.25 V.

Angular velocity, ω = ?

Using Induced Emf formula

\varepsilon = NAB\omega

\omega= \dfrac{\varepsilon}{NAB}

\omega= \dfrac{1.25}{645\times 20.25\times 5\times 10^{-5}}

\omega = 1.914\ rad/s

Angular velocity of the coil = \omega = 1.914\ rad/s

5 0
4 years ago
The current required to stimulate the heart during ventricular fibrillation is about 110mA (1000mA = 1A). Assuming that a conduc
algol [13]

Answer:

Explanation:

Given

current required I=110 mA

Internal Resistance R=300 \Omega

According to ohm law

Current flows in a conductor is directly Proportional to the voltage applied.

V\propto I

V=IR

V=110\times 10^{-3}\times 300

V=33 V  

5 0
3 years ago
Why does 100% relative humidity in the winter feel nothing like 100% relative humidity in the summer?
adell [148]

The 100% relative humidity in the winter feel nothing like 100% in summer because it depends on "the saturation of the temperature".

<u>Explanation:</u>

Temperature really makes a big difference. Even once warm, a cold winter air produces much less humidity than summer heat. One cubic unit of air needs 0.001 ounces of water to saturate it, to elevate its ratio to one hundred per cent.

Nevertheless, it takes 0.022 ounces of water to saturate the one cubic unit of air once the temperature is eighty, which is twenty-two times that amount of water. Air with a humidity of one hundred percent at eighty degrees holds twenty-two times as much water as air at zero with humidity at one hundred percent.

4 0
3 years ago
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