1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
scoray [572]
3 years ago
9

20 POINTSSS!!!!!!!!

Physics
1 answer:
Soloha48 [4]3 years ago
7 0
Answer: A
Hope this help you!!
You might be interested in
Two metal bricks are held off the edge of a balcony from the same height above the ground. The bricks are the same size but one
Dvinal [7]

Answer:

e.

Explanation:

  • Assuming that the air resistance is neglectable, both bricks are only accelerated by gravity, which produces a constant acceleration on both bricks, which is the same, according  Newton's 2nd Law, as we can see below:
  • F_{g}  = m*g = m*a  (1)
  • ⇒a = g = 9.8m/s² (pointing downward)
  • Since acceleration is constant, if both fall from the same height, we can apply the following kinematic equation:

       \Delta y = v_{o} * t - \frac{1}{2} *g*t^{2}  (2)

  • Since both bricks are held off the edge, the initial speed is zero, so (2) reduces to the following equation:

        h =\frac{1}{2} *g*t^{2}  (3)

  • Since h (the height of the balcony) is the same, we conclude that both bricks hit ground at exactly the same time.
  • If the air resistance is not negligible, due both bricks have zero initial speed, and have the same shape, they will be affected by the drag force in similar way, so they will reach the ground at approximately the same time.
6 0
3 years ago
the momentum of a spring coil when the external compressing force is removed b the difference between the final momentum and the
Fed [463]

Answer:

the correct one is b

the difference between the final moment and the initial moment

Explanation:

The momentum is related to the moment

          I = ΔP

          ∫ F dt = p_f - p₀

where p_f and p₀ are the final and initial moments, respectively

When checking the different answers, the correct one is b

the difference between the final moment and the initial moment

7 0
3 years ago
How far will 350 j raise a 7 kg mass?
DaniilM [7]
W=350 J=M g H
Solve for the height, H
G=9.8 m/s^2
M=7kg
H will be in meters if you use those units.
6 0
3 years ago
The length of a 100 mm bar of metal increases by 0.3 mm when subjected to a temperature rise of 100°C. The coefficient of linear
Juli2301 [7.4K]

Answer:

α = 3×10^-5 K^-1

Explanation:

let ΔL be the change in length of the bar of metal, ΔT be the change in temperature, L be the original length of the metal bar and let α be the coefficient of linear expansion.

then, the coefficient of linear expansion is given by:

α = ΔL/(ΔT×L)

   = (0.3×10^-3)/(100)(100×10^-3)

   = 3×10^-5 K^-1

Therefore, the coefficient of linear expansion is 3×10^-5 K^-1

5 0
3 years ago
How can passive transport be used in a sentence
Olenka [21]
Passive transport occurs thanks to diffusion, diffusion is the reason passive transport is able to travel throughout the cell membrane.
7 0
3 years ago
Other questions:
  • Unless otherwise posted, what is the speed limit in a school zone? florida
    8·1 answer
  • A right triangle has a hypotenuse of 37 and a leg of 10. What is the second leg of the triangle?
    6·1 answer
  • Light from the sun heats Earth's atmosphere. When the air becomes warmer, it expands. Which type of energy increases to cause th
    15·2 answers
  • The heating element of a water heater in an apartment building has a maximum power output of 37 kW. Four residents of the buildi
    13·1 answer
  • Question 11 (2 points)
    8·1 answer
  • An electric heating element is connected to a 110 V circuit and a current of 3.2 A is flowing through the element. How much ener
    6·2 answers
  • The earth and moon are seperated by a
    12·1 answer
  • A ball is tossed with enough speed straight up so that it is in the air several seconds. Assume upward direction is positive and
    13·1 answer
  • A volleyball that has an initial momentum of
    13·1 answer
  • 25. a small container of water is placed on a turntable inside a microwave oven, at a radius of 12.0 cm from the center. the tur
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!