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lidiya [134]
3 years ago
12

Reese can run 10 meter in 5 seconds.What is her speed?

Physics
1 answer:
Bad White [126]3 years ago
4 0

Answer:

2 meters per second

Explanation:

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A pitcher throws a baseball at 45 m/s. The baseball has a mass of 400 grams. Disregarding air resistance, the baseball's momentu
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So it would be 8.90 m/s kg*m/s
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3 years ago
A 6.9 kg object is suspended by a string from the ceiling of an elevator. The acceleration of gravity is 9.8 m/s 2 . Determine t
lina2011 [118]

Answer:

Tension, T = 87.63  N

Explanation:

Given that,

Mass of the object, m = 6.9 kg

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Acceleration due to gravity, g = 9.8 m/s²

As the lift is accelerating upwards, it means the net force acting on it is given by :

T = m(a+g)

= 6.9 (2.9+9.8)

= 6.9(2.7)

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So, the tension in the string is 87.63  N.

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3 years ago
Who’s of the following is classified as a salt: ammonia or sodium chloride?
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Sodium Chloride could be classified as a salt.

8 0
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Which type of wave has a frequency just higher than violet visible light and is used by the skin to produce Vitamin D?
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4 0
3 years ago
The potential energy of a 35 kg cannon ball is 14000 J. How high was the cannon ball to have this much potential energy?
Anettt [7]

From the information given, cannon ball weighs 40 kg and has a potential energy of 14000 J.

We need to find its height.

We will use the formula P.E = mgh

Therefore h = P.E / mg

where P.E is the potential energy,

m is mass in kg,  

g is acceleration due to gravity (9.8 m/s²)

h is the height of the object's displacement in meters.

h = P.E. / mg

h = 14000 / 40 × 9.8

h = 14000 / 392

h = 35.7

Therefore the canon ball was 35.7 meters  high.

6 0
3 years ago
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