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Nina [5.8K]
3 years ago
5

Standing still, Bruce, the quarterback, gets tackled by Biff, the 90.0-kg tackle, who is traveling at 7.0 m/s. Upon collision, B

iff stops and Bruce goes flying off at 10 m/s. What is Bruce's Mass?​
Physics
2 answers:
babymother [125]3 years ago
6 0

\\ \sf\longmapsto \Delta P=P

\\ \sf\longmapsto m1v1=m2v2

\\ \sf\longmapsto 90(7)=m2(10)

\\ \sf\longmapsto 10m2=630

\\ \sf\longmapsto m2=\dfrac{630}{10}

\\ \sf\longmapsto m2=63kg

Bruces mass is 63kg

Nataly_w [17]3 years ago
5 0

Answer:

pls answer this for me

Explanation:

Which statement best describes an example of selective breeding?

A. People grow many radish plants from a package of radish seeds.

B. People use viruses to place certain genes in the cells of plant

tissues O

C. People use enzymes to cut DNA into pieces that are put back together.

D. People grow rose plants whose flowers have petals of a specific color.

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Your answer is: Imagine you are in rush hour of traffic in a major city. Now imagine that all the traffic is only on one land instead of being spread out on all six lanes. With more paths, there is less resistance to flow. 

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6 0
3 years ago
Which of the following is NOT one of Kirchhoff's laws?
Anon25 [30]

Answer:

C) A low-density, cool gas in isolation creates a continuous spectrum.

Explanation:

Kirchhoff’s laws established that:

  • A solid, liquid or dense incandescent gas emits a continuous spectrum.
  • A hot and diffuse gas produces bright spectral lines (emission lines).
  • A gas of lower temperature against a source of continuum spectrum, produces dark spectral lines (absorption lines) superposed in the continuum spectrum.

Stars are perfect examples for Kirchhoff’s laws. Since in the case of the stars, the photons that are received are not directly from the nucleus, but those that have traveled hundreds of thousands of years to reach the stellar atmosphere. Due to the stars are not at homogeneous temperature, density and pressure, but have gradients in different layers because of the nuclear reactions, superficial gravity or to its constant exchange of heat with its surroundings in an attempt to reach the thermodynamic equilibrium, the continuum observed in the stellar spectra comes from the inner layer of the photosphere, while absorption lines are formed in the outer layer of the photosphere and the stellar atmosphere. More accurately, a photon of the inner layer of the photosphere will be absorbed by an electron of an atom or ion that is in the outer layer, generating an electronic transition¹, the electron, upon returning to its base state will emit a photon or a series of photons that will not necessarily go in the same direction of the incident photon, creating an absorption line in the stellar spectrum.

On the other hand, in the case where the stars have surrounding material (diffuse gas), the atoms, molecules or ions in the medium are excited by the radiation that comes from the stellar atmosphere, thus producing an emission spectrum.

Key terms:

¹Electronic transition: When an electron passes from one energy level to another, either for the emission or absorption of a photon.

8 0
3 years ago
An object is thrown horizontally off of a cliff. While falling, what happens to the horizontal acceleration?
irga5000 [103]

There is no acceleration in the horizontal direction because the speed in that direction is constant. So it stays at zero.

8 0
3 years ago
PLEASE HURRY WILL GIVE BRAINLIEST four people went out for a bike ride. which had the greatest average speed?
klasskru [66]
The answer would be c. hope this helps☺





4 0
4 years ago
A positive charge of 8.0 × 10-4 C is in an electric field that exerts a force of 3.5 × 10-4 N on it. What is the strength of the
Gennadij [26K]

Answer:

E = 0.437 N/C

Explanation:

Given that,

Charge, q=8\times 10^{-4}\ C

Electric force, F=3.5\times 10^{-4}\ N

Let the strength of the electric field is E. We know that, the electric force is given by :

F = qE

Where

E is the electric field strength

E=\dfrac{F}{q}\\\\E=\dfrac{3.5\times 10^{-4}}{8\times 10^{-4}}\\E=0.437\ N/C

So, the strength of the electric field is equal to 0.437 N/C.

6 0
3 years ago
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