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Wittaler [7]
3 years ago
7

Ronaldo runs across a soccer field, moving 10 meters north, then 8 meters west, then 4 meters south. His

Physics
1 answer:
ArbitrLikvidat [17]3 years ago
5 0

Answer:

wha is this .....................? same confusion

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Read the article Watering Livestock with Renewable Energy.
DaniilM [7]

Answer:

D. Wind and solar energy help save money and reduce air pollution.

Explanation:

7 0
2 years ago
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Boron (B) has an atomic number of 5 and an atomic mass of 11. Boron has _____.
Neko [114]

Answer:

the answer is 5 electrons

Explanation:

because its the same name as the amount of protons

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3 years ago
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1. A sample of gas has a constant temperature and number of particles. As the volume of the gas sample is increased, the pressur
AURORKA [14]

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1.C

2.C

3.C

Explanation:

hope its help hehe:(

4 0
2 years ago
A hammer strikes one end of a thick iron rail of length 5.60 m. A microphone located at the opposite end of the rail detects two
never [62]

Answer:

A) The wave that travels through the rail reaches the microphone first.

B) separation in time between the arrivals of the two pulses is 0.01539 seconds.

Explanation:

Detailed explanation and calculation is shown in the image below

4 0
3 years ago
You want to lean your dad's ladder on a smooth wall. If the mass of ladder is 4.42 kg and coefficient
iren [92.7K]

Answer:

angle minimum   θ = 41.3º

Explanation:

For this exercise let's use Newton's second law in the condition of static equilibrium

    N - W = 0

    N = W

The rotational equilibrium condition, where we place the axis of rotation on the wall

We assume that counterclockwise rotations are positive

     fr (l sin θ) - N (l cos θ) + W (l/2 cos θ) = 0

     

the friction force formula is

     fr = μ N

     fr = μ W

we substitute

      μ m g l sin θ - m g l cos θ + mg l /2   cos θ = 0

      μ sin θ - cos θ + ½ cos θ= 0

         

       μ sin θ - ½ cos θ = 0

       sin θ / cos θ = 1/2 μ

       tan θ = 1/2 μ

       θ = tan⁻¹ (1 / 2μ)

       θ = tan⁻¹ (1 (2 0.57))

      θ = 41.3º

7 0
3 years ago
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