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3 years ago

What is the value of n?

Physics

2 answers:

vekshin13 years ago

6 0

Answer:

THE ANSWE IS C

Explanation:

dusya [7]3 years ago

6 0

81 or 85 I think this because a right angle is 90 degrees and 81 or 85 is a little less

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Definition of mass definition of density definition of physical properties

butalik [34]

Answer:

Mass of a body is define as the total quantity of matter contained in it .

Density is the mass per unit volume in any object .

A physical properties is an any property that is measurable , whose value describe a state of a physical system

6 0

3 years ago

The wavelength of light beam B is twice the wavelength of light beam B. The energy of a photon in beam A is:

julia-pushkina [17]

Corrected question: The wavelength of light beam A is twice the wavelength of light beam B. The energy of a photon in beam A is:

Answer:

Explanation:

Energy = hc/λ

λ(A) =2λ(B)...................equation 1

We will solve for the ratio of energy of A to energy of B.which is

$\frac{E_{A} }{E_{B} }$

=(hc/λA) ÷ (hc/λB)

referring to equation 1 we have

=(hc/2λB) ÷ (hc/λB)

=hc/2λB) × (λB/hc)

= λB/2λB

$\frac{E_{A} }{E_{B} }$ =1/2

${E_{A} = \frac{1}{2} E_{B}$

The energy of A is half of B

6 0

3 years ago

Calculate final temperature of 50 g of water heated with 20000 J. The heat capacity of water is 4190 J /kg/ ºC.

hjlf

Answer:

95.47 C

Explanation:

Heat added = mass × heat capacity × rise in temperature

So, rise in temperature =

20000 / (0.05 × 4190)

Rise in temperature = 95.47 C

4 0

3 years ago

romanna [79]

Answer: 0.00068 N

Explanation: Universal gravitational constant=6.674 *10^(-11)

Force=Gm1m2/(r^2)

Force= 6.67*25000*40000*10^(-11)/(10^2)

Force=0.00068 N

6 0

3 years ago

By how many newtons does the weight of a 85.9-kg person lose when he goes from sea level to an altitude of 6.33 km if we neglect

sergejj [24]

Answer:

$Weight\ loss=1.6321N$

Explanation:

From the question we are told that:

Weight $W=85.9kg$

Altitude $h= 6.33 km$

Let

Radius of Earth $r=6380km$

Gravity $g=9.8m/s^2$

Generally the equation for Gravity at altitude is mathematically given by

$g_s=9.8(\frac{6380}{6380+6.33})^2$

$g_s=9.781m/s^2$

Therefore

Weight at sea level

$W_s=9.8*85.9$

$W_s=841.82N$

Weight at 6.33 altitude

$W_a=9.781*85.9$

$W_a=840.2N$

Therefore

$Weight loss=W_s-W_b$

$Weight loss=841.82-840.2$

$Weight loss=1.6321N$

3 0

3 years ago