PHYSICS HIGH SCHOOL

A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water?A. 12 meters/second2
B. 1.5 × 102 meters/second2
C. 78.6 meters/second2
D. 6.5 × 10-3 meters/second2

Answers

Answer 1
Answer:
Magnitude of acceleration = (change in speed) / (time for the change) .

Change in speed = (ending speed) - (starting speed)

                            =       zero            - (43 m/s)

                            =          -43 m/s .

Magnitude of acceleration = (-43 m/sec) / (0.28 sec)

                                          =  (-43 / 0.28)  (m/sec) / sec

                                          =        153.57...  m/s²

                                          =        1.5...  x 10²  m/s²  .
Answer 2
Answer:

Answer:

1.5*10^2 meters/seconds^2

Explanation:

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Related Questions

Which of the following best describes the difference between speed and acceleration? A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing. B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing. C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object. D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an objectWhich of the following best describes the difference between speed and acceleration?  A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing.  B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.  C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object.  D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an object.
Value that is measured by the slope of a position-time graph
A box is being pulled to the right on flat ground with a force of 112 N at an angle of 42° to the horizontal. What is the x-component of the force of tension?
A boy pushes on a wagon so that it accelerates at a rate of 0.50 m/s2. The wagon has a mass of 24 kg. What is the magnitude of the boy's pushing force? (Ignore frictional effects.) 12 N, 12 kg, 48 N, or 48 kg
Green light has a lower frequency than blue light. Which color of light has a longer wavelength?

The active sections that are located along fault lines are called A. seismic gaps.
B. seismic risks.
C. stress accumulations.
D. recurrence gaps

Answers

B. seismic risks.

The active sections that are located along fault lines are called seismic risks.
NOT:

A. seismic gaps. 
C. stress accumulations. 
D. recurrence gaps

Sa se calculeze caldura degajata de un fier de calcat dace este alimentat la 220v si este parcurs de un curent electric de 100 a. Se stie ca acesta functioneaza 25 de min

Answers

Answer

33,000,000 joules or 33MJ

Explanation:

The formula for calculating the heat released by a substance is expressed as shown below;

where;

Q is the amount of heat released

p is the power expended

t is the time it takes

Since P = current * voltage\nP = IV

Then;

Q = IVt

Given the current I = 100A, supply voltage V = 220V and required time t = 25mins

t = 25 * 60 = 1500 seconds

Substituting these values ​​in the formula that we have;

Q = 100 * 220 * 1500\nQ = 22000*1500\nQ = 33,000,000Joules\ or\ 33MJ

The connections of many simple pieces in the brain is evidence of the:O A. lobes of the brain
B. brain's complexity
C. function of neurons
D. cerebral cortex

Answers

B. Brains Conplexity

Hope This Helps ♡

Answer:

B. brain's complexity

Explanation:

Ape.x

Calculate how long it takes for a stone falling from a bridge with an average acceleration downward of 9.8m/s^2 to hit the water. The stone starts from rest and hits the water with a velocity of 12.3m/s.

Answers


If the stone begins from rest and ends with a downward speed
of 12.3 m/s, then it must have spent

                       (12.3) / (9.8) = 1.26 seconds
falling.

The smallest group of particles in a crystal that retains the shape of the crystal is called the

Answers

Answer:

Unit Cell

Explanation:

  • A unit cell is the smallest fundamental particle of a crystal structure that represents the structure of a crystal.
  • Long-range, three-dimensional repetitiveness of this unit cell forms a crystal. A unit cell is composed of ions or atoms in a particular arrangement forming a well-defined structure.
  • Crystal have a sharp melting and boiling point and when cut using a tool, they give a sharp edge on the pieces.

The largest building in the world by volume is the Boeing 747 plant in Everett, Washington. It measures approximately 634 m long, 710 yards wide, and 109 ft high. volume in feet^3

Answers

So to get the volume, you're going to multiply all three together, but you have to make all the units the same first. The answer wants ft³, so you want to convert them all to feet.height = 109 ft, so that's fine already. Awesome.width = 710 yd, but that's an easy conversion to feet. Three feet equal one yard, so just multiply (710 yd) by (3 ft/1 yd) and that'll give you the width in ft.length = 634 mThis one is a little tricker, but same principle. First convert meters to centimeters, like this: (634 m)(100 cm/1 m). Then take that number in cm and convert it into inches, knowing that 1 inch = 2.54 centimeters. So multiply the inches you have by (1 in/2.54 cm). Then you'll change that number into feet by dividing it by twelve, since there are twelve inches in each foot.Now you have all three measurements in feet. Just multiply them together to get the volume in ft³ and you're good to go! :)
The volume  =  (length) x (width) x (height) .

But before we can do the multiplication, all three dimensions
have to be in the same unit.

The question is asking for the answer in cubic feet, and one of
the dimensions is already in feet.  So let's change the other two
dimensions to feet.

Length:
1 meter = 3.28 feet
634 meters = (634 x 3.28) feet

Width:
1 yard = 3 feet
710 yards = (710 x 3) feet

Height:
109 feet

Volume  =     (length)          x        (width)       x   (height)

               = (634 x 3.28 ft)    x    (710 x 3 ft)    x    (109 ft)

               =        48,292,580 cubic feet .
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