PHYSICS HIGH SCHOOL

Which of the following describes something through which objects can be seen clearly?translucent

opaque

transparent

obtuse


Plz help me and my lil sis suck at sience :P

Answers

Answer 1
Answer:
Its Transparent. While Transparent, Opaque, and Translucent are all able to let light through only Transparent allows objects on the other side to be clearly seen. Also Obtuse means insensitive, Slow to understand or greater than 90degrees but less than 180degrees. Hope this helps.
Answer 2
Answer:

Answer:

It is translucent

Explanation: i put it and got it right

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If the wavelength of a photon in vacuum is the same as the de broglie wavelength of an electron, then the

Answers

Answer:

Explanation:

The photons travel faster faster through space because photons always travel through space faster than electrons, in fact when an electron gets hitted by a photon this boost its speed

A mass of 2kg has a kinetic energy of 16J.what is the momentum of the body?​

Answers

Explanation:

mass - 2kg

energy - 16 j

2

k.e- 1/2mv

2

16j=1/2×2×v

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16×2/2=v

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Calculate the speed of the ball, vo in m/s, just after the launch. A bowling ball of mass m = 1.5 kg is launched from a spring compressed by a distance d = 0.21 m at an angle of θ = 32° measured from the horizontal. It is observed that the ball reaches a maximum height of h = 4.4 m, measured from the initial position of the ball. Let the gravitational potential energy be zero at the initial height of the bowling ball.

Answers

Answer:

v_0=17.3m/s

Explanation:

In this problem we have three important moments; the instant in which the ball is released (1), the instant in which the ball starts to fly freely (2) and the instant in which has its maximum height (3). From the conservation of mechanical energy, the total energy in each moment has to be the same. In (1), it is only elastic potential energy; in (2) and (3) are both gravitational potential energy and kinetic energy. Writing this and substituting by known values, we obtain:

E_1=E_2=E_3\n\nU_e_1=U_g_2+K_2=U_g_3+K_3\n\n(1)/(2)kd^2=mg(d\sin\theta)+(1)/(2)mv_0^2=mgh+(1)/(2)m(v_0\cos\theta)^2

Since we only care about the velocity v_0, we can keep only the second and third parts of the equation and solve:

mgd\sin\theta+(1)/(2)mv_0^2=mgh+(1)/(2)mv_0^2\cos^2\theta\n\n(1)/(2)mv_0^2(1-\cos^2\theta)=mg(h-d\sin\theta)\n\nv_0=\sqrt{(2g(h-d\sin\theta))/(1-\cos^2\theta)}\n\nv_0=\sqrt{(2(9.8m/s^2)(4.4m-(0.21m)\sin32\°))/(1-\cos^232\°)}\n\nv_0=17.3m/s

So, the speed of the ball just after the launch is 17.3m/s.

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B movable
C combination
D advantageous

Answers

D advantageousA pulley is a wheel on an axle or shaft that is designed to support movement and change of ... The drive element of a pulley system can be a rope, cable, belt, or chain that runs over the pulley.

How does a proper warm up affect blood flow

Answers

It speeds blood flow. The heart beats faster, it is beating blood faster.

Scientist infer that most of earth earliest atmosphere was produced by?

Answers

Scientists infer that most of Earth earliest atmosphere was produced by the escape of gases from Earth's molten surface. Once these gases were released from the very hot surface that covered the Earth, the earliest stages and levels of the atmosphere we know today were created. Many of those earliest gases still make up our atmosphere today.Hope this helps. Let me know if you need additional help!

Scientists infer that most of Earth earliest atmosphere was produced by the escape of gases from Earth's molten surface. Once these gases were released from the very hot surface that covered the Earth, the earliest stages and levels of the atmosphere we know today were created. Many of those earliest gases still make up our atmosphere today


Explanation:

Earth shaped through a method of accretion -collision of rocks and dirt particles, that step by step shaped a bigger and bigger object. These impacts generated loads of warmth, therefore early Earth would are a hot and desolate place. Vapour is assumed to own shaped a steam atmosphere, and incoming iron-rich rocks colliding with Earth would have reacted with a number of this water to provide rise to H gas.
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