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ExtremeBDS [4]
3 years ago
15

Ja-Anna, has a mass of 45 kg, climbed 3m up a ladder to rescue her cat from a tree. how much work against gravity did she do?

Physics
1 answer:
lara [203]3 years ago
5 0
45*3*2=20kg in total
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Nicole is putting together a new workout program. She does a large amount of research to determine how often she should exercise
Misha Larkins [42]

Answer:

A. FITT

Explanation:

F - Frequency - how often she should exercise

I - Intensity - how hard she should work out

T - Time - how long each workout should last

T - Type - how many different exercises/activities she should complete

7 0
3 years ago
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How high a hill can a car coast up (engine disengaged) if work done by friction is negligible and
aev [14]

Answer:

h= 46.66 m

Explanation:

Given that

Initial speed of the car ,u = 110 km/h

We know that

1 km/h= 0.277 m/s

u= 30.55 m/s

lets height gain by car is h.

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v²=u²- 2 g h

v= 0 m/s

0²=30.55²- 2 x 10 x h           ( g = 10 m/s²)

h= 46.66 m

4 0
3 years ago
The diagram below shows the heating of an unknown substance (it is not water). Its melting point is? The diagram below shows the
Anettt [7]

Answer:

the answer is B

Melting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change.

4 0
2 years ago
25 points and i will give brainliest +5 star rating to a correct a correct answer!!!!
Gnesinka [82]

Answer:

1.97 * 10^8 m/s

Explanation:

Given that:

n = 1.52

Recall : speed of light (c) = 3 * 10^8 m/s

Speed (v) of light in glass:

v = speed of light / n

v = (3 * 10^8) / 1.52

v = 1.9736 * 10^8

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4 0
3 years ago
1.
rusak2 [61]

Answer:

9.6

Explanation:

to convert km to miles multiply by 1.609

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4 years ago
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