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3 years ago

The mechanical advantage of a wheel and axle is the radius of the wheel divided by the radius of the axle. TRUE or FALSE.

Physics

1 answer:

viva [34]3 years ago

4 0

True! The mechanical advantage of the wheel and axle is equal to the ratio of the radius of the wheel over the radius of the axle.

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Three guns are aimed at the center of a circle, and each fires a bullet simultaneously. The directions in which they fire are 12

ikadub [295]

Answer:

The unknown mass of the bullet is $m1=3.751x10^{-3} kg$

Explanation:

According to Newton's laws of motion, when a net external force acts on a body of mass m , it results in change in momentum of the body and is given by:

$F=\frac{P}{dt}$

Where:

is the linear momentum of the body

As a consequence, when there are no external forces acting on the body the total momentum remains conserved i.e.

Given:

$m_{2}=5.79x10^{-3}kg \\m_{3}=5.79x10^{-3}kg\\v_{2}=v_{3}=392 \frac{m}{s}\\$

For momentum along the y-direction to be zero, it is achieved when the equal masses are moving at angles of

θ1=180°, θ2=60°, θ3=-60°

Therefore, from conservation of momentum along x - direction:

$m_{1}*v_{1}*cos(180)+m_{2}*v_{2}*cos(60)+m_{3}*v_{3}*cos(-60)=0\\$ $m_{1}*605\frac{m}{s}*cos(180)+5.79x10^{-3}kg *392\frac{m}{s}*cos(60)+5.79x10^{-3}kg*392\frac{m}{s}*cos(-60)=0\\$

$-m_{1}*605+5.79x10^{-3}kg*196\frac{m}{s}+5.79x10^{-3}kg*196\frac{m}{s}=0\\m_{1}*605kg= 2.26968\frac{kg*m}{s}\\m_{1}=3.75 x10^{-3} kg$

3 0

3 years ago

Which expression describes the third vector in the diagram, which leads from the tip of B to the tip of Ā?

podryga [215]

Answer:

axb

Explanation:

because the singular order

6 0

3 years ago

Static discharge differs from electric current because static discharge is described by which of the following?

Bond [772]

Static discharge differs from electric current because static discharge is described by C. lasting for only a fraction of a second.
This is a very short period of time, and electric current lasts longer than a static discharge does.

4 0

4 years ago

Read 2 more answers

A small metal bar whose initial temperature was 20 degrees Celsius is dropped into a large container of boiling water. How long

Vesnalui [34]

Below is the answer. I hope it help.
T ( t ) = C e k t + T m where Tm is the temperature of the surroundings
T ( t ) = C e k t + T m
T ( 0 ) = 20
T ( 1 ) = T ( 0 ) + 2 = 22
C + T m = 20 C+Tm=20
C e k + T m = 22

4 0

3 years ago

The centroid of the plane region shown is at c. use the method of composite area to determine the radius (R)? please someone hel

GenaCL600 [577]

I don’t understand what are you trying to do ?

6 0

3 years ago