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dsp73
2 years ago
13

If your heart is not strong enough or efficient enough, it is difficult to (3 points)

Physics
2 answers:
Lyrx [107]2 years ago
8 0

it's difficult to breathe.

Mariulka [41]2 years ago
5 0

-- climb 100 stairs 2 at a time

-- run a mile in less than a day

-- lift one end of your car without help

-- run for president

-- fall deeply in love

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A charged particle enters into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vec
Ugo [173]

Answer:

a circular path

Explanation:

In a magnetism field if a charged particle having a charge of magnitude '' enters  such that its velocity vector V is 90° to the direction of the magnetic field "B'', then it will experience a force, called Lorentz force F

F = V\times B

According to the property of cross-product, the Lorentz force (F) acting on the particle will be perpendicular to the instantaneous position of the particle, making the path of the particle to be a circular path.

3 0
3 years ago
The line spectrum of lithium has a red line at 670.8 nm. Calculate the energy of a photon with this wavelength.
Vadim26 [7]
First of all, we can calculate the frequency of the photon, which is related to the wavelength by the following equation:
f= \frac{c}{\lambda}
where c is the speed of light and \lambda=670.8 nm=670.8 \cdot 10^{-9} m is the photon wavelength. Substituting into the formula, we find the frequency
f= \frac{c}{\lambda}= \frac{3 \cdot 10^8 m/s}{670.8 \cdot 10^{-9} m}=4.47 \cdot 10^{14} Hz

Now we can find the energy of the photon with the following equation:
E=hf
where h is the Planck constant. Substituting numbers, we find
E=hf=(6.6 \cdot 10^{-34}Js)(4.47 \cdot 10^{14} Hz)=2.95 \cdot 10^{-19} J
5 0
3 years ago
Two planets have masses 2 x 10^23 kg and 5 x 10^22 kg, and the distance between them is 3 x 10^16 m. Calculate the gravitational
xxTIMURxx [149]

Explanation:

given,

mass of one planet (m1)=2*10^23 kg

mass of another planet (m2)=5*10^22kg

distance between them(d)=3*10^16m

gravitational constant(G)=6.67*10^-11Nm^2kg^-2

gravitational force between them(F)=?

we know,

F=Gm1m2/d^2

or, F=6.67*10^-11*2*10^23*5*10^22/(3*10^16)^2

or, F=6.67*2*5*10^-11+23+22/3*3*10^32

or, F=66.7*10^34/9*10^32

or, F=7.41*10^34-32

•°• F=7.41*10^2

thus, the gravitational force between them is 7.14*10^2

3 0
2 years ago
What does each letter stand for in the formula p=v x i?
Nataly_w [17]
I only know P and V and P is pressure and V is volume 
6 0
3 years ago
Write a difference between force and work? ​
Nesterboy [21]

Answer:

force is a derived quantity

work is a fundamental quantity

2.Force is measured in Newton why work is measured in Newton per seconds (N/s)

Explanation:

no

3 0
2 years ago
Read 2 more answers
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