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3 years ago

True or false. electrons move in orbits in the same way plants orbit the sun

Physics

2 answers:

zalisa [80]3 years ago

7 0

One plants don't orbit the sun, the earth does.
two true if its saying plants orbit the sun

Len [333]3 years ago

4 0

This is false. Electrons do not orbit in the same way that planets orbit the sun. But they are similar since both fields behave the same way except that the Gravitational force is a long range force. T<span>he main difference is that electron orbits are oriented in all directions.</span>

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Ryan is driving home from work and notices a deer leaping onto the road about 25 m in front of his car. He immediately applies t

Anvisha [2.4K]

Answer:

mu = 0.56

Explanation:

The friction force is calculated by taking into account the deceleration of the car in 25m. This can be calculated by using the following formula:

$v^2=v_0^2+2ax\\$

v: final speed = 0m/s (the car stops)

v_o: initial speed in the interval of interest = 60km/h

= 60(1000m)/(3600s) = 16.66m/s

x: distance = 25m

BY doing a the subject of the formula and replace the values of v, v_o and x you obtain:

$a=\frac{v^2-v_o^2}{2x}=\frac{0m^2/s^2-(16.66m/s)^2}{2(25m)}=-5.55\frac{m}{s^2}$

with this value of a you calculate the friction force that makes this deceleration over the car. By using the Newton second's Law you obtain:

$F_f=ma=(1490kg)(5.55m/s^2)=8271.15N$

Furthermore, you use the relation between the friction force and the friction coefficient:

$F_f= \mu N=\mu mg\\\\\mu=\frac{F_f}{mg}=\frac{8271.15N}{(1490kg)(9.8m/s^2)}=0.56$

hence, the friction coefficient is 0.56

6 0

3 years ago

Tammy leaves the office, drives 34 km due north, then turns onto a second highway and continues in a direction of 35◦ north of e

Natasha2012 [34]

Answer:

The total displacement is 102 km $51^o$ north of east.

Explanation:

We can treat this problem as a trigonometric one, so we need to calculate the total displacement on the north and east.

$d_n=34km+79km*sin(35^o)=79km$

and

$d_e=79*cos(35^o)=65km$

The total displacement is given by:

$D=\sqrt{(79km)^2+(65km)^2}=102km$

with an agle of:

$\alpha =arctg(\frac{79km}{65km})=51^o$

4 0

3 years ago

What is meant by pressure?write its unit.

Mars2501 [29]

Answer:

Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed

Unit: Pascal (Pa)

1Pa = 1N/m^2

5 0

3 years ago

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arr

zmey [24]

Answer:

F =1490.9 N

Explanation:

given,

work done = 82 J

compression length = 0.220 m

for parallel combination

$k_{eq}= k_1+k_2$

= 2 k

work done

$w = \dfrac{1}{2}k_{eq}x^2$

$k_{eq} = \dfrac{2W}{x^2}$

$k_{eq} = \dfrac{2\times 82}{0.22^2}$

$k_{eq} =3388.43 N/m$

force =

F = kx

F = 3388.43 ×0.22

F =745.45 N

the additional work done

final potential energy = $\dfrac{1}{2}k_{eq}(2x)^2$

= 4 W = 328 J

the additional work = 328 - 82 = 255 J

maximum force

F = k × 2x

F = 2×745.45

F =1490.9 N

6 0

3 years ago

What is three example of technology

alex41 [277]

Computers, cell phones, and television

6 0

3 years ago