3 years ago

CAN YOU HELP, JUST NUMBER 3

Physics

2 answers:

bonufazy [111]3 years ago

6 0

Answer:

its b option balance hi your last question

Volgvan3 years ago

6 0

Answer:

c. thermometer ....................

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A bullet with a mass ????b=13.5 g is fired into a block of wood at velocity ????b=249. The block is attached to a spring that ha

larisa86 [58]

Answer:

$M = 0.436 kg$

Explanation:

As per energy conservation we can say that energy stored in the spring at the position of maximum compression must be equal to the kinetic energy of bullet and block system

so here we have

$\frac{1}{2}(m + M)v^2 = \frac{1}{2} kx^2$

here we know that

k = 205 N/m

x = 35 cm

$\frac{1}{2}(m + M)v^2 = \frac{1}{2}(205)(0.35)^2$

now by momentum conservation we know that

$mv_o = (m + M)v$

$v = \frac{m}{m + M} v_o$

now plug in all values in it

$v = \frac{0.0135}{0.0135 + M}(249)$

now from above equation

$\frac{1}{2}(0.0135 + M)( \frac{0.0135}{0.0135 + M}(249))^2 = 12.56$

$\frac{5.65}{0.0135 + M} = 12.56$

by solving above equation we have

$M = 0.436 kg$

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4 years ago

The mass of an electron is _______. What is it?

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If a mass of a neutron is 1 the electron mass is 0.00054386734 and it's charge is negative. Hope this helps! ;)

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3 years ago

Automobile engines AND steam engines are examples of ______. a. internal combustion engines b. heat engines c. external combusti

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Answer: B. Heat engines

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3 years ago

Read 2 more answers

A ball of mass 0.10 kg moving at a speed of 3.0 m/s collides with a wall and bounces directly back with the same speed. If the b

alexdok [17]

The magnitude of the average force exerted on the ball by the wall is calculated below.

The average force exerted by the ball on the wall is 3 N

Explanation:

Given:

mass of the ball (m)=0.10 kg

speed (v) =3.0 m/s

time taken(t) =0.01 seconds

To calculate:

Average force(F) exerted by ball on the wall

We know;

F=(m×v)÷t

F=(0.10×3.0)÷0.01

Therefore the average force exerted by the ball on the wall is 3 N

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4 years ago

Which example is NOT a part of the electromagnetic spectrum?

soldier1979 [14.2K]

Electricity is not apart of it

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3 years ago

CAN YOU HELP, JUST NUMBER 3​

CAN YOU HELP, JUST NUMBER 3