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3 years ago

The law of reflection states that if the angle of incidence is 76 degrees, the angle of reflection is ___ degrees.

1 answer:

3 0

Answer is 76 degrees.

The law of reflection states that when a line is reflected on a straight plane, the angle of incidence is equal to the angle of reflection. In this case, the angle of incidence and the angle reflection are 76 degrees.

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What is the surface pressure of Venus?

kiruha [24]

answers 93 bar

The atmosphere of Venus is the layer of gases surrounding Venus. It is composed primarily of carbon dioxide and is much denser and hotter than that of Earth. The temperature at the surface is 740 K (467 °C, 872 °F), and the pressure is 93 bar (9.3 MPa), roughly the pressure found 900 m (3,000 ft) underwater on Earth.

3 0

3 years ago

Problem 3: A basketball player is running at 4.75 m/s toward the basket when he jumps into the air to dunk the ball. He maintain

LekaFEV [45]

Answer

given,

speed of the basketball player, v_x = 4.75 m/s

height of the jump = ?

a) initial vertical velocity = 0 m/s

final vertical velocity = ?

height, h = 0.75 m

using equation of motion

v² = u² + 2 g h

v² = 0² + 2 x 9.8 x 0.75

v² = 14.7

v = 3.83 m/s

b) let horizontal distance= x m

maximum height at time , t s

time taken to reach maximum height

$t = \dfrac{3.83}{9.8}$

t = 0.39 s

horizontal distance

= v_x × t

= 4.75 × 0.39

= 1.85 m

horizontal distance is equal to 1.85 m

8 0

3 years ago

An inverted image of an object is viewed on a screen from the side facing a converging lens. An opaque card is then introduced c

Marta_Voda [28]

Answer:

d) The image would be dimmer

Explanation:

When inverted image of an object is viewed on a screen from the side facing a converging lens, the

lens focuses the diverging, and blurred light rays from the distance object through refraction of the rays two times.Then the rays is converge by the double bending cl at a focal point behind the lens inorder for a sharper image to be be observed.

But when an opaque card is then introduced to cover only the upper half of the lens then the image becomes dimmer because of the reduction in the light intensity on the screen by 50%

5 0

3 years ago

Twoâ€‹ high-speed ferries leave at the same time from a city to go to the same island. The firstâ€‹ ferry, theâ€‹ Cat, travels a

kumpel [21]

Answer:

1 hour

Explanation:

Since the definition of velocity is $v=x/t$ , we can calculate the position at time t of an object moving at speed v with $x=vt$ .

The position of the first ferry is $x_1=v_1t$

The position of the second ferry is $x_2=v_2t$

We want to know when they will be 6 miles apart. This means, if we call that distance d, that we want to know when the difference between their positions will be d, or $x_1-x_2=d$ (we know that at the beginning the position of the ferry 1 is of higher value than that of ferry 2 since it left before).

We use our previous formulas then:

$d=x_1-x_2=v_1t-v_2t=(v_1-v_2)t$

Since we want the time, we do:

$t=\frac{d}{v_1-v_2}$

And substitute our values:

$t=\frac{6\ miles}{30\ miles/hour-24\ miles/hour}=\frac{6\ miles}{6\ miles/hour} =1\ hour$

7 0

3 years ago

An engine performs 2700 J of work on a scooter. The scooter and rider have a combined mass of 150 kg. If the scooter started at

Finger [1]

Due to the principle of conservation of energy, the work done by the engine to move the scooter converts into kinetic energy of the scooter:
$W=K= \frac{1}{2} M v^2$
where M is the combined mass of scooter and rider, and v is the velocity of the scooter. Therefore, we can find the velocity as:
$v= \sqrt{ \frac{2W}{M} } = \sqrt{ \frac{2\cdot 2700 J}{150 Kg} }=6 m/s$

6 0

4 years ago