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3 years ago

Many streets and parking lots are illuminated with ???

Physics

2 answers:

lora16 [44]3 years ago

4 0

The streets are illuminated with sodium vapor lights. hope this helps!!!!!!

UkoKoshka [18]3 years ago

3 0

Answer: C. sodium-vapor lights

Explanation:

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Calcular la aceleración que produce una fuerza de 40 N sobre un cuerpo con 88 Kg de masa. Expresar el resultado en m⁄s^2 *

tigry1 [53]

Answer:

a = 0.45 m/s²

Explanation:

The given question is ''Calculate the acceleration that produces a force of 40 N on a body with 88 kg of mass".

Given that,

Force, F = 40 N

Mass of the body, m = 88 kg

The net force acting on the body is given by :

F = ma

Where

a is the acceleration of the body

$a=\dfrac{F}{m}\\\\a=\dfrac{40\ N}{88\ kg}\\\\a=0.45\ m/s^2$

So, the required acceleration is 0.45 m/s².

4 0

3 years ago

An object of mass 100kg is released from rest and falls through a distance of 10m.what is the work done by gravity

aleksandr82 [10.1K]

Answer:

Mass = 100 kg

Acceleration due to gravity = 9.8m/s

Height = 10 m

Work done = mgh

= 100 x 9.8 x 10

= 9800 J

Hope this helps!

8 0

3 years ago

The index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660 . A beam of white light in

chubhunter [2.5K]

Answer:

The angular separation equals $0.35^{o}$

Explanation:

We have according to Snell's law

$n_{1}sin(\theta _{1})=n_{2}sin(\theta _{2})$

$\therefore \theta _{2}=sin^{-1}(\frac{n_{1}sin(\theta _{1})}{n_{2}})$

Using this equation for both the colors separately we have

$\theta _{red}=sin^{-1}(\frac{sin(23.90^{o})}{1.62})\\\\\theta _{red}=14.48^{o}$

Similarly for violet light we have

$\theta _{violet}=sin^{-1}(\frac{sin(23.90^{o})}{1.660})\\\\\theta _{violet}=14.13^{o}$

Thus the angular separation becomes

$\Delta \theta =14.48-14.13=0.35^{o}$

6 0

4 years ago

They did a flu shot from McKinnon at 45° to the horizontal with an initial speed of 25 m/s and that is positioned at a horizonta

Margarita [4]

Answer:

The time taken for the daredevil to travel the 50 m horizontally is 2.83 s.

Explanation:

Given;

angle of projection, θ = 45°

initial speed of the projectile, u = 25 m/s

horizontal distance traveled by the projectile, x = 50 m

The time taken for the daredevil to travel the 50 m horizontally is calculated as;

$t =\frac{X}{u_x}$

where;

$u_x$ is the horizontal component of the velocity = uCosθ

$t =\frac{X}{u Cos \ \theta} \\\\t =\frac{50}{25 \times Cos(45)} \\\\t= \frac{50}{17.678} \\\\t = 2.83 \ s$

Therefore, the time taken for the daredevil to travel the 50 m horizontally is 2.83 s.

6 0

3 years ago

A block of mass 3.7 kg, which has an initial velocity of 7.9 m/s at time t = 0, slides on a horizontal surface. Calculate the wo

Lady_Fox [76]

Answer:

115.6 J

Explanation:

$m$ = mass of the block = 3.7 kg

$v_{f}$ = final speed of the block = 0 ms⁻¹

$v_{o}$ = initial speed of the block = 7.9 ms⁻¹

$W$ = work done on the block

Using work done - change in kinetic energy theorem, we have

$W = (0.5) m (v_{o}^{2} - v_{f}^{2})\\W = (0.5) (3.7) (7.9^{2} - 0^{2})\\W = 115.6 J$

5 0

4 years ago

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