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Ludmilka [50]
3 years ago
13

The drawing on the right shows a man (mass = 70kg) and the child (mass = 35 kg) push each other apart. The man moves away with a

speed of 0.3 m/s relative to the ice.
Calculate the velocity of the child relative to the ice.


LET MOMENTUM EQUATION GUIDE YOUR THINKING...


SHOW YOUR WORK - INCLUDE UNITS

Physics
2 answers:
nordsb [41]3 years ago
7 0

Refer to the attachment..

Pepsi [2]3 years ago
3 0

Answer:

<h2>Hope it would help you.</h2>

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At a certain point in space, there is a potential of 800 V relative to zero. What is the potential energy of the system when a +
sammy [17]

To solve this problem we will apply the concepts related to electric potential and electric potential energy. By definition we know that the electric potential is determined under the function:

V = \frac{k_e q}{r}

k_e = Coulomb's constant

q = Charge

r = Radius

At the same time

U = \frac{k_e q_1q_2}{r}

The values of variables are the same, then if we replace in a single equation we have this expression,

U  = Vq

If we replace the values, we have finally that the charge is,

V = 800V

q = 1\mu C

U = (800V)(1*10^{-6}C)

U = 8*10^{-4}J

Therefore the potential energy of the system is 8*10^{-4} J

7 0
3 years ago
Questions 8 out of 20
MrMuchimi

Answer:

potential energy

Explanation:

8 0
3 years ago
The number of bacteria in a certain population increases according to a continuous exponential growth model, with a growth rate
sveta [45]

Answer:

It would take approximately 289 hours for the population to double

Explanation:

Recall the expression for the continuous exponential growth of a population:

N(t)=N_0\,e^{kt}

where N(t) measures the number of individuals, No is the original population, "k" is the percent rate of growth, and "t" is the time elapsed.

In our case, we don't know No (original population, but know that we want it to double in a certain elapsed "t". We also have in mind that the percent rate "k" would be expressed in mathematical form as: 0.0024 (mathematical form of the given percent growth rate).

So we need to solve for "t" in the following equation:

2\,N_0=N_0\,e^{0.0024\,t}\\\frac{2\,N_0}{N_0} =e^{0.0024\,t}\\2=e^{0.0024\,t}\\ln(2)=0.0024\,t\\t=\frac{ln(2)}{0.0024} \\t=288.811\,\, hours

Which can be rounded to about 289 hours

6 0
3 years ago
a 320-foot tree casts a 130-foot shadow on horizontal ground. a girl lying on the grass at the tip of the shadow is looking at a
mixer [17]

Answer:\theta =67.88^{\circ}

Explanation:

Given

Height of tree is H=320 ft

length of shadow L=130 ft

let \theta be the angle of elevation

using trigonometric relation

\tan \theta =\frac{H}{L}

\tan \theta =\frac{320}{130}

\theta =tan^{-1}(2.461)

\theta =67.88^{\circ}

7 0
3 years ago
Which explains how the Coriolis effect causes air circulation?
stira [4]
The Coriolis effect causes air circulation when <span>Air from the equator moves toward the poles slower than the ground below it, so friction causes the air to veer east. In contrast, air from the poles moves toward the equator faster than the ground below it, so friction causes it to veer to the west. The answer is letter A</span>
3 0
3 years ago
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