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3 years ago

6

An object is launched with a vertical velocity of 44.3 m/s upward, and a horizontal velocity of 12 m/s. What is the maximum heig

ht reached by the object?

1 answer:

Brrunno [24]3 years ago

7 0

b is the answer there you go if you need the answer

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Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. The maxi

V125BC [204]

Answer:

$1.25\times 10^{19}\ electrons$

Explanation:

r = Rate of flow of charge = 20000 C/s

t = Time taken = 100 μS

Charge is given by

$Q=rt\\\Rightarrow Q=20000\times 100\times 10^{-6}\\\Rightarrow Q=2\ C$

The charge that flows between the ground and the cloud in this time is 2 C

Number of electrons is given by

$n_e=\dfrac{Q}{e}\\\Rightarrow n_e=\dfrac{2}{1.6\times 10^{-19}}\\\Rightarrow n_e=1.25\times 10^{19}\ electrons$

The number of electrons is $1.25\times 10^{19}\ electrons$

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Two waiters are trying to get through a single door of a kitchen. One pushes on one side of a door 0.567 m from the hinge with a

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Answer:

$275.5 N$

Explanation:

$F_{1}$ = Force on one side of the door by first waiter = 257 N

$F_{2}$ = Force on other side of the door by second waiter

$r_{1}$ = distance of first force by first waiter from hinge = 0.567 m

$r_{2}$ = distance of second force by second waiter from hinge = 0.529 m

Since the door does not move. hence the door is in equilibrium

Using equilibrium of torque by force applied by each waiter

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