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3 years ago

11

if the emission lines in the spectrum of one object are more strongly blueshifted than those from a second object, then the firs

t object is moving

1 answer:

Lelu [443]3 years ago

6 0

Answer:

Toward us faster than the second object

Explanation:

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Mali loves to make herself dizzy. She spins in place 7 times before falling down right where she was standing. Find her distance

Mila [183]

The answer is 0 bc she didint move
Explanation:

8 0

3 years ago

Read 2 more answers

An archer pulls back the string of a bow to release an arrow at a target. Which kind of potential energy is transformed to cause

svetoff [14.1K]

I believe the answer would be elastic because you are pulling the sting of the bow back.

hope this helps :)

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4 years ago

Read 2 more answers

A spring with spring constant 31 N/m is attached to the ceiling, and a 4.5-cm-diameter, 1.5 kg metal cylinder is attached to its

aalyn [17]

Answer:

0.315758099469 m

Explanation:

m = Mass of cylinder = 1.5 kg

$\rho$ = Density of water = 1000 kg/m³

V = Volume = Ah

A = Area = $\pi r^2$

k = Spring constant = 31 N/m

x = Displacement

g = Acceleration due to gravity = 9.81 m/s²

Here the forces are conserved

Weight of cylinder = Buoyant force + Spring force

$mg=\rho Vg+kx\\\Rightarrow mg=\rho Ahg+kx\\\Rightarrow 1.5\times 9.81=1000\times \pi(2.25\times 10^{-2})^2x\times 9.81+31x\\\Rightarrow 1.5\times 9.81=46.60213x\\\Rightarrow x=\dfrac{1.5\times 9.81}{46.60213}\\\Rightarrow x=0.315758099469\ m$

The length of the submerged cylinder is 0.315758099469 m

4 0

4 years ago

What has more momentum: a sports car moving at 100 mph or a train that is not moving?

Elan Coil [88]

Well, the Train will have no movement since it is not moving, so a Sports car that is going 100 mph will have Momentum.

4 0

4 years ago

One of the statements below is correct In an ideal system where all forms of friction are ignored?

noname [10]

Answer:

a.

Explanation:

In a perfect system then energy can be changed from Kinetic to Gravitational Potential and vice versa without any losses. A common form of loss would be thermal energy, so b. is not the answer. c. is invalid as we want these 2 forms of energy to be transferred between, and d. is invalid as these statements c and a contradict each other.

3 0

3 years ago