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3 years ago

First Amendment

Physics

2 answers:

cricket20 [7]3 years ago

7 0

Answer:

B. They were concerned about the government having too much power.

Explanation:

Ksivusya [100]3 years ago

3 0

Answer:

They were concerned about the government having too much power.

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Dovator [93]

C most of the Earths weather occurs in this layer.

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3 years ago

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Find the center of mass (in cm) of a one-meter long rod, made of 50 cm of copper (density 8.92 g/cm3) and 50 cm of iron (density

Gennadij [26K]

Answer

given,

copper rod length = 50 cm

density of the copper = 8.92 g/cm³

iron rod length = 50 cm

density of iron = 7.86 g/cm³

mass of iron = density × volume

m_i = 7.86 × A × l/2

m_c = 8.96 × A × l/2

taking the intersection of copper and iron rod be starting point cooper side is taken as positive side and iron side length is taken to be -ve side.

center of mass

= $\dfrac{m_i\times \dfrac{-l}{4}+m_c\times \dfrac{l}{4}}{m_i+m_c}$

= $\dfrac{7.86\times A \times \dfrac{l}{2}\times \dfrac{-l}{4}+8.96\times A \times \dfrac{l}{2}\times \dfrac{l}{4}}{7.86\times A \times \dfrac{l}{2}+8.96\times A \times \dfrac{l}{2}}$

= $\dfrac{7.86\times \dfrac{-l}{4}+8.92\times \dfrac{l}{4}}{7.86+8.92}$

= $\dfrac{1.06\dfrac{l}{4}}{16.78}$

= 0.015793 m

= 1.579 m (+ve)

center of mass shift to cooper because cooper is heavy.

4 0

3 years ago

Two cyclists, 50 miles apart, start riding toward each other at the same time. One cycles 4 times as fast as the other, and they

Bond [772]

Answer:speed of slower cyclist is 5 mph

Explanation:

Given

Distance between two cyclist is 50 miles

One cycle is 4 times fast as other

Speed of slower cyclist is r miles per hour

speed of faster cyclist is 4 r

they meet after t=2 hr

Distance traveled by fast cyclist is $x=2\times 4r$

Distance traveled by slower cyclist is $y=2\times r$

$x+y=50$

$2\times 4r+2\times r=50$

$8r+2r=50$

$10r=50$

$r=5 mph$

$4 r=20 mph$

speed of slower cyclist is 5 miles per hour

3 0

3 years ago

After a ball is thrown upward and is in the air, what will its acceleration do?

kifflom [539]

Acceleration will always be samei.e.

Acceleration=g= 9.81 m/s^2

8 0

3 years ago

How long will it take a 2.93 hp motor to lift a 250 kg beam directly upward at constant velocity from the ground to a height of

V125BC [204]

Answer: 50.4 s

Explanation:

The energy expended by the motor, must be equal to the work done by it, which is just equal to the change in the gravitational potential energy of the beam, as we are told that the beam is being lifted directly upward at constant speed (so, the applied force is equal and opposite at any time to the gravity force on the beam) , as follows:

W = m*g*h = 250 kg. * 9.8 m/s²* 45.0 m = 110,250 J

Now, as Power is just Energy / Time, we need just to solve for time this equation.

But, prior to be able to solve this equation, we need that our units be consistent.

As we are given the motor power in HP, we need to convert this unit to Joules/seg, as follows:

1 HP = 746 W

2.93 HP = 2.93 HP * (746W/1HP) = 2,186 J/s

Solving the Power equation for t:

t = W/P = 110,250 J / 2,186 J/s = 50.4 s

3 0

3 years ago