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Mama L [17]
3 years ago
7

A 35-kg boy is riding an 18-kg bicycle down a path. The bicycle is moving at 11 m/s.

Physics
1 answer:
ddd [48]3 years ago
4 0

Answer:

K.E= 1/2mv2

Explanation:

K.E= 1/2×17×121

K.E =1028.5

K.E=102

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Andrew [12]

Answer:

B. An electric current into a magnetic field

Explanation:

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5 0
3 years ago
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A 1.20 kg water balloon will break if it experiences more than 530 N of force. Your 'friend' whips the water balloon toward you
soldi70 [24.7K]

Answer:

t = 0.029s

Explanation:

In order to calculate the interaction time at the moment of catching the ball, you take into account that the force exerted on an object is also given by the change, on time, of its linear momentum:

F=\frac{\Delta p}{\Delta t}=m\frac{\Delta v}{\Delta t}       (1)

m: mass of the water balloon = 1.20kg

Δv: change in the speed of the balloon = v2 - v1

v2: final speed = 0m/s (the balloon stops in my hands)

v1: initial speed = 13.0m/s

Δt: interaction time = ?

The water balloon brakes if the force is more than 530N. You solve the equation (1) for Δt and replace the values of the other parameters:

|F|=|530N|= |m\frac{v_2-v_1}{\Delta t}|\\\\|530N|=| (1.20kg)\frac{0m/s-13.0m/s}{\Delta t}|\\\\\Delta t=0.029s

The interaction time to avoid that the water balloon breaks is 0.029s

5 0
3 years ago
Robert hook used an early microscope to observed a cork sample. How did this help contribute to cell theory?
Lady bird [3.3K]

Answer:

Robert Hooke used an early microscope to observe a cork sample. How did this help contribute to cell theory? It helped to show that cells contain water. ... It helped to show that some cells are visible to the naked eye.

Explanation:

If your teacher checks if it was copied just put it in your on words

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3 years ago
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ivanzaharov [21]
No, no me habla espanol. yo soy ingles
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3 years ago
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