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3 years ago

Find the acceleration of a hamster when it increases its velocity from rest to 8.0 m/s in 3.0 s .

1 answer:

6 0

Acceleration is the change in velocity divided by time.
We can find acceleration a, by the following formula

a=v-u/t

where,
v is the final velocity (in this question v=8.0 m/s)
u is the initial velocity (since the hamster starts from rest, u=0)
t is the time taken (i,e 3.0 second)
now by applying the formula we have,

a = 8.0 - 0 / 3
= 8 / 3
= 2.65 m/s²

The acceleration is 2.65 meters per second squared

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Carlos has some soil that has too much sand mixed in for growing plants. What should he add to improve the soil for growing plan

Sauron [17]

Answer:

He would have to add Top Soil

Explanation:

My Mom grows a punch of plants so I asked her and she said Top Soil but if this is not the answer I am sorry :)

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3 years ago

An inductor is connected to an AC power supply having a maximum output voltage of 3.00 V at a frequency of 280 Hz. What inductan

Sergio [31]

Answer:

L = 0.48 H

Explanation:

let L be the inductance, Irms be the rms current, Vrms be the rms voltage and Vmax be the maximum voltage and XL be the be the reactance of the inductor.

Vrms = Vmax/(√2)

= (3.00)/(√2)

= 2.121 V

then:

XL = Vrms/I

= (2.121)/(2.50×10^-3)

= 848.528 V/A

that is L = XL/(2×π×f)

= (848.528)/(2×π×(280))

= 0.482 H

Therefore, the inductance needed to kepp the rms current less than 2.50mA is 0.482 H.

6 0

3 years ago

Calculate the wavelength of the electromagnetic radiation required to excite an electron from the ground state to the level with

anastassius [24]

Answer:

2.11 m

Explanation:

Given data

h=6.626× $10^{-34\\}$ (plank constant)

L=45.7 pm

n=n2-n1

n=5-1

n=4

where,

n2=5

n1=1

To find:

E=?

λ=? (Wavelength)

solution

The energy stored in an electron at a specified level is given by;

E= $h^{2}$ × $n^{2}$ ÷8m $l^{2}$ ..........(1)

m=mass of electron(9.1× $10^{-31}$ )

l=length of box

To find E

putting the value of given data in eq(1)

E=9.41× $10^{-16}$

To find λ

λ=hc/E............................(2)

c=3× $10^{8}$ (speed of light)

putting the value in eq 2 to find wavelength

λ=2.11 m

Note:

There is a chance in calculation error. but the method is correct to solve the problem.

7 0

3 years ago

Read 2 more answers

The kinetic energy, k, of an object varies jointly with the mass of the object and the square of the velocity of the object. a 5

o-na [289]

Answer:

KE = 1/2 M V^2 = 1/2 * 25 * 10^2 = 1250 J

Check

M2 = 1/2 M1

V2 = V1 / 2

E2 = 1/2 * 1/4 E1 = E1 / 8 = 10000 / 8 = 1250 J

8 0

2 years ago

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HELPPPPP !!!!

Nataly [62]

Your answer is C)

a)t=2.78 sec

b)R=835.03 m

Explanation:

Given that

h= 38 m

u=300 m/s

here given that

The finally y=0

t=2.78 sec

The horizontal distance,R

R= u x t

R=300 x 2.78

R=835.03 m

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3 years ago