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Katen [24]
3 years ago
8

Which scientist proved experimentally that a shadow of the circular object illuminated 18. with coherent light would have a cent

ral bright spot?
A. Young
B. Fresnel
C. Poisson
D. Arago
Physics
1 answer:
Zina [86]3 years ago
8 0

Answer:

Your answer is( D) - Arago

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A car travels at a constant speed of 25 m/s. Find the power supplied by the engine if it can supply a maximum force of 18,000 N​
mina [271]

Answer:

720

Explanation:

8 0
2 years ago
What is the stopping distance if the car is initially traveling at speed 6.0v? assume that the acceleration due to the braking i
Sunny_sXe [5.5K]
The distance for any rectilinear motion at constant acceleration is:

d = v₀t + 0.5at²
where
v₀ is the initial velocity

So, if v₀ = 6v, and it stopped to 0 m/s, then the acceleration is equal to:
a = (0 - 6v)/t = -6v/t
Thus,
d = (6v)(t) + (0.5)(-6v/t)(t²)
d = 6vt - 3t
<span>d = 3t(2v - 1)</span>
4 0
3 years ago
If two coils placed next to one another have a mutual inductance of 3.00 mH, what voltage (in V) is induced in one when the 2.50
hodyreva [135]

Answer:

-0.1875 V.

Explanation:

Using

E₂ = MdI₁/dt........................ Equation 1

Where E₂ = Voltage induced in the second coil, M = mutual inductance of both coil, dI₁ = change in current in the first coil, dt = change in time.

Given: M = 3.00 mH = 0.003 H, dI₁ = (0-2.50) = -2.5 A, dt = 40 ms = 0.04 s.

Substitute into equation 1

E₂ = 0.003(-2.5)/0.04

E₂ = -0.1875 V.

Hence the induced emf = -0.1875 V.

3 0
3 years ago
Two soccer players run toward each other. One player has a mass of 85 kg
sveta [45]

Answer:

Total momentum, p = 55 kg-m/s

It is given that,

Mass of player 1, m₁ = 85 kg

Mass of player 2, m₂ = 105 kg

Speed of player 1, v₁ = -8 m/s (west)

Speed of player 2, v₂ = 7 m/s (east)

Momentum is equal to the product of mass and velocity. For this system, momentum is given by :

p=m_1v_1+m_2v_2p=m

1

v

1

+m

2

v

2

p=85\ kg\times (-8\ m/s)+105\ kg\times 7\ m/sp=85 kg×(−8 m/s)+105 kg×7 m/s

p = 55 kg-m/s

The total momentum of the system made up of the two players is 55 kg-m/s.

8 0
2 years ago
Any force that causes an object to move in a circle is called a(n)
Vaselesa [24]
A). balanced force
b). unbalanced force
There's no such thing as either of these.  A group of two or more forces can be balanced or unbalanced.  A single force can't be.

c). gravitational force ... doesn't cause an object to move in a circle;
     Drop a stone from the roof of a tall building and watch it fall.
     It goes straight down, not in a circle.

d). centripetal force ... force directed toward the center of a circle,
     causes an object to move in a circle.

8 0
3 years ago
Read 2 more answers
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