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Snowcat [4.5K]
3 years ago
5

Juan's mother drives 12.5 miles southwest to her favorite shopping mall. What is the velocity of her

Physics
1 answer:
stich3 [128]3 years ago
5 0

Answer:

v1= 12.5miles, t= -7.25m, a= 0

v= 1/2at^2

v= 1/2×

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An adiabatic closed system is accelerated from 0 m/s to 34 m/s. Determine the specific energy change of this system, in kJ/kg.
prohojiy [21]

Answer:

Δe=0.578 kJ/kg

Explanation:

Given data

Velocity v₁=0 m/s

Velocity v₂=34 m/s

to find

Specific energy change Δe

Solution

The specific energy change is simply determined from change in velocity

Δe=(v₂²-v₁²)/2

Put the given values to find the specific energy change

=(\frac{(34)^{2} *10^{-3} }{2} )\\=0.578kJ/kg

Δe=0.578 kJ/kg

6 0
3 years ago
Read 2 more answers
Christine Ladd-Franklin was a mathematician and psychologist who faced many obstacles as a woman, but she persevered and made si
Veseljchak [2.6K]
The struggles were that women weren't really supposed to get an education back then, people called intelligent women witches and wouldn't teach them things. Those were the main struggles. As for her contributions to psychology, check this site out, https://en.wikipedia.org/wiki/Christine_Ladd-Franklin
7 0
3 years ago
A marble runs off the edge of a table that is 1.5 m high and the marble lands 0.50 m from the base of the table. a. How much tim
Free_Kalibri [48]

Answer:

t = 0.55[sg]; v = 0.9[m/s]

Explanation:

In order to solve this problem we must establish the initial conditions with which we can work.

y = initial elevation = - 1.5 [m]

x = landing distance = 0.5 [m]

We set "y" with a negative value, as this height is below the table level.

in the following equation (vy)o is equal to zero because there is no velocity in the y component.

therefore:

y = (v_{y})_{o}*t - \frac{1}{2} *g*t^{2}\\   where:\\(v_{y})_{o}=0[m/s]\\t = time [sg]\\g = gravity = 9.81[\frac{m}{s^{2}}]\\ -1.5 = 0*t -4.905*t^{2} \\t = \sqrt{\frac{1.5}{4.905} } \\t=0.55[s]

Now we can find the initial velocity, It is important to note that the initial velocity has velocity components only in the x-axis.

(v_{x} )_{o} = \frac{x}{t} \\(v_{x} )_{o} = \frac{0.5}{0.55} \\(v_{x} )_{o} =0.9[m/s]

3 0
3 years ago
Steve tunes an old-fashioned radio that has an antenna made from a 3.0-cm-long solenoid with a cross-sectional area of 0.50 cm2
sukhopar [10]

Answer:

L = 1.88\times10^-^4 H

Explanation:

It is given that,

Length of the coil, l = 3 cm = 0.03 m

Area of cross section of the coil, A=0.5\ cm^2=0.00005\ m^2

Number of turns in the coil, N = 300

inductance of the coil is

L=\dfrac{\mu_oN^2A}{l}

L=\dfrac{4\pi\times 10^{-7}\times (300)^2\times 5\times 10^{-5}}{0.03}\\L = 1.88\times10^-^4 H

So, the inductance of the coil is 1.88× 10⁻⁴H

5 0
3 years ago
What is the climate of northern Alaska?
sasho [114]

Answer:

It's short, cool summers (where snow could be year round) and long cold winters.

5 0
4 years ago
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