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Lisa [10]
4 years ago
10

Do anyone k ow the answers?

Physics
1 answer:
OLga [1]4 years ago
7 0
Hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
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In the absence of air resistance, at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 de
snow_tiger [21]

As we know that range of the projectile motion is given by

R = \frac{v^2 sin(2\theta)}{g}

here we know that range will be same for two different angles

so here we can say the two angle must be complementary angles

so the two angles must be

\theta, 90 - \theta

so it is given that one of the projection angle is 75 degree

so other angle for same range must be 90 - 75 = 15 degree

so other projection angle must be 15 degree

5 0
3 years ago
Un gallo se pavonea en línea recta en el techo. Su movimiento se muestra en la siguiente gráfica de la posición horizontal, x, c
Svetllana [295]

Answer:

Entonces, velocidad instantánea = | v | = 0,25 m / s

Explanation:

pregunta completa

Por favor, encontrar el archivo adjunto

Solución

La velocidad instantánea está dada por,

v = dx / dt = pendiente de la curva x-t

aquí, del gráfico:

en x = 1 m ---> t = 8 s

en x = 3 m ---> t = 0 s

entonces, dx = 1-3 = -2 m

dt = 8-0 = 8 s

Entonces,

v = -2/8

v = -0,25 m / s

Dado que, pseed es una cantidad escalar.

Entonces, velocidad instantánea = | v | = 0,25 m / s

8 0
3 years ago
Since there are no aurora observed on Venus we can conclude that Venus a. lacks atmospheric oxygen b. is too hot for magnetic fo
Brrunno [24]

Answer:

Yes, Venus does not have the same magnetic field as that of earth's  

Explanation:

Instead, there are solar wind particles that can deeply penetrate the venus atmosphere and can collide with the other carbon atoms already present in the air but lacks oxygen and thus does not have that strong magnetic field which would deflect the suns rays and create aurora in the sky at night.

6 0
3 years ago
And 84.1 kg man is standing on a frictionless ice surface when he throws a 1.80 kg book at 11.1 m/s. With what velocity does the
Aleksandr [31]
<h2>Final velocity of man is -0.23 m/s.</h2>

Explanation:

Conservation of linear momentum :

When no external force acts on a  system of several interacting particles, the total linear momentum of system is conserved.

Before the Throw ; Man mass (M₁) = 84.1 kg,

                                Velocity of Man (u₁) = 0 m/s

                                Book Mass(M₂) = 1.80 kg

                                 Velocity of book (u₂)= 0 m/s

 After the throw ;   Man mass(M₁) = 84.1 kg

                                Velocity of Man(V₁) = ?

                                 Book mass(M₂) = 1.80 kg

                                  velocity of book(V₂) = 11.1 m/s

  According to conservation of linear Momentum

    Initial Momentum = Final Momentum

 M₁u₁ +M₂u₂ =  M₁v₁ + M₂v₂

84.1 x0 + 1.80 x0 = 84.1 x v₁ + 1.80 x 11.1

   0         =     84.1 v₁  + 19.98

v₁ =   -19.98 /84.1

     = -0.23 m/s

final velocity of man is -0.23 m/s

3 0
4 years ago
A stone dropped from the height of 90 m with velocity does it reach to the ground
Anon25 [30]

Explanation and answer:

To solve this problem, we use the kinematics equation:

v^2-u^2=2aS  .........................(1)

where

assuming the positive direction is downwards)

v = final velocity (when it reaches ground)

u = 0 = initial velocity (when it was dropped, or released, with zero vertical velocity).

a = 9.81 m/s^2 = acceleration due to gravity (on earth's surface)

S = 90m = distance travelled.

Substitute values into (1)

v^2 - 0^2 = 2*(9.81)*90

v^2 = 1765.8 m^2/s^2

v = sqrt(1765.8) m/s

= 42.02 m/s

= 42 m/s  (to two significant figures).

7 0
3 years ago
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