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gogolik [260]
3 years ago
12

In Europe, a large circular walking track with a

Physics
1 answer:
Elina [12.6K]3 years ago
4 0

Answer: 10.67

Explanation:

First, we needed to calculate the radius and this will be:

= Diameter / 2

= 0.900km / 2

= 0.450km

Since s = 3.00miles, we need to convert it to kilometers and this will be:

1mile = 1.6km

3 miles = 3 × 1.6km = 4.8km

Radians = s/r = 4.8/0.45 = 10.67

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Which of the following is the best thermal conductor?
wel

Answer:

steel because being alloy in metal it has free electrons in metals

7 0
3 years ago
A lacrosse ball leaves the sick horizontally at 12.0m/s. the catcher is 14.0 away. How much does the ball fall vertically travel
boyakko [2]

Answer:

1.65 m

Explanation:

The motion of the ball is a projectile motion, so it is a parabolic motion with two independent motions:

- on the x-axis, a uniform motion with constant speed v_x=12.0 m/s

- on the y-axis, a uniformly accelerated motion with constant acceleration a=9.8 m/s^2 downward.

First of all, we need to find the time t at which the ball has travelled halfway to the chatcher, i.e. at a distance of x=14.0/2=7.0 m. This can be found by using the relationship between distance, time and velocity along the horizontal direction:

t=\frac{x}{v_x}=\frac{7.0 m}{12.0 m/s}=0.58 s

So now we can move to the vertical motion, and we can calculate the distance covered vertically by the ball while falling for t=0.58 s, by using:

S=\frac{1}{2}at^2=\frac{1}{2}(9.8 m/s^2)(0.58 s)^2=1.65 m

7 0
3 years ago
Which objects represents a negatively charged particle?
denis-greek [22]

Answer: B,A,C,C

Explanation:

3 0
3 years ago
Read 2 more answers
Using energy considerations and assuming negligible air resistance, show that a rock thrown from a bridge 20.0 m above water wit
madam [21]

Answer:

The initial energy and final energy are the same

= 307.52m

≅ 308m

Explanation:

see the attached file

6 0
4 years ago
Which properties define light as a wave?
Naddik [55]

Properties that define the light is a wave are

1. Speed : speed of light is 300,000 Km /s, It is most fundamenta property of light to define light is a wave

2. Reflection: Light particles or photons reflect off the particles or masses are continue to travel at the same speed.

3. colour

6 0
3 years ago
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