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Leya [2.2K]
3 years ago
10

Edwin Hubble was one of the first scientists to show that galaxies are getter farther apart from each other. (A.) True (B.) Fals

e
Physics
2 answers:
lara [203]3 years ago
5 0
The answer is A: True 


 i hopes this helps :D
grandymaker [24]3 years ago
5 0

The answer is True becuase

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A circuit contains a 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current
Vitek1552 [10]

The formula that links voltage (V), resistance (R) and current intensity (I) is

V=RI

Solve this formula for I to get

I=\dfrac{V}{R}

Plug your values for V and R and you'll get the current.

8 0
4 years ago
Whenever Dylan walks into his room, his roommate loudly blows an air horn, which startles Dylan. Dylan doesn't think this is fun
Sav [38]

Answer:

stimuli

Explanation:

4 0
3 years ago
A girl throws a marshmallow that lands in her friend’s mouth 2 m away. The girl threw the marshmallow at an angle of 30 degrees.
natima [27]

She threw the marshmallow at a speed of around 4.76 m/s.The formula for the horizontal range gives the velocity.

<h3>What is projectile motion?</h3>

The motion of an item hurled or projected into the air, subject only to gravity's acceleration, is known as projectile motion.

The item is known as a projectile, and the course it takes is known as a trajectory. Falling object motion is a simple one-dimensional kind of projectile motion with no horizontal movement.

Given data;

The marshmallow was thrown at a distance of 2 meters

Range,R =  3 m

Initial velocity,u

The angle at which the marshmallow was thrown,θ = 30°

The acceleration due to gravity,g = 9.81 m/s²

The projectile's motion is divided into two parts: horizontal and vertical motion.

\rm R = \frac{u^2sin2 \theta }{g} \\\\ \rm R  = \frac{u^2sin2 \times (30) }{9.81} \\\\ u^2=\frac{2 \times 9.81 }{sin 60^0} \\\\ u^2=22.66 \\\\ u=4.76 \ m/sec

Hence, she throws the marshmallow at a speed of 4.76 m/sec.

To learn more about the projectile motion refer to the link;

brainly.com/question/11049671

#SPJ1

4 0
2 years ago
Which of the following statements are true? The internal resistance of a battery decreases with decreasing temperature. A batter
Eddi Din [679]

Answer:

Option B

Explanation:

  • The obstruction offered by the battery is known as its internal resistance. Electricity is produced by the chemical reactions inside the battery. The pace of the responses is straightforwardly relative to the temperature and the power delivered by the battery increments. In this way, the inward opposition of the battery increments as diminishing the temperature.  
  • The battery is a gadget which generates electrical energy by the chemical reactions that takes place inside it.  
  • In this way, the announcement a battery is a gadget that produces electricity by the transformation of chemical energy into electrical energy is valid.  
  • The potential difference between the terminals of a battery, when no current is streaming into an outer circuit is called emf of the battery and if the potential distinction is measure when the current is streaming into the outside circuit is called terminal voltage .
  • The battery attempts to move the negative charge from the low potential terminal to the high potential terminal of the battery. The potential vitality of the negative charges is high at the lower potential terminal and the potential vitality of the negative charge is low at the high potential terminal. Along these lines, the battery attempts to move the charges from high potential terminal to low potential terminal.
7 0
3 years ago
When light of frequency equal to 2.40 × 1015 s−1 shines on the surface of silver metal, the kinetic energy of ejected electrons
sesenic [268]

Answer: 9.98 *10^-19 J

Explanation: In order to explain this probelm we have to consider the balance enegy for photoelectric effect.

h*f-W=Ek where h is the Planck constant and W the work function and Ek the kinetic energy. f is the frequency of light.

W=h*f-Ek=6.62*10^-34*2.4*10^15-5.9*10^-19=9.98*10^-19J

3 0
3 years ago
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