PHYSICS HIGH SCHOOL

Ted William drops a ball from 14.5 meter to a desk that is 1.9 meters tall. What is the final speed of the ball right before it hits the desk.

Answers

Answer 1
Answer:

Answer:

15.7m/s

Explanation:

To solve this problem, we use the right motion equation.

 Here, we have been given the height through which the ball drops;

 Height of drop = 14.5m - 1.9m  = 12.6m

The right motion equation is;

      V²  = U² + 2gh

V is the final velocity

U is the initial velocity  = 0

g is the acceleration due to gravity  = 9.8m/s²

h is the height

  Now insert the parameters and solve;

       V² = 0² + 2 x 9.8 x 12.6

      V²  = 246.96

       V = √246.96  = 15.7m/s

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A wave travels at a speed of 34 cm/s. It’s wavelength is 18 cm. What is the period of the wave?0.75 s

1.2 s

0.66 s

0.53 s

Regions of compression and rarefaction help define _______.

Electromagnetic waves

Longitudinal waves, but not transverse waves

Transverse waves, but not longitudinal waves

All mechanical waves

Answers

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As light shines from air to another medium, i = 26.0 º. The light bends toward the normal and refracts at 32.0 º. What is the index of refraction? A)0.827
B)0.944
C)1.21
D)1.06

Answers

The equation for the index of refraction is n = sin(theta1)/sin(theta2) where theta1 is the refracted angle and theta2 is the angle in a medium. Plugging in the values for the index of refraction, n = sin(32)/sin(26) we get 1.21. the answer is letter C. The index of refraction is always greater than 1.

That answer is wrong it is not 1.21 just turned it in and was wrong

Suppose your rub a balloon in your hair and it acquires a static charge of −2 × 10⁻⁹c. what is the magnitude of the electric field created by the balloon at a location 1 m due north of the balloon? Coulomb’s constant is 9 × 10⁹ N · m²/c² . Answer in units of N/C

Answers

To find the magnitude of the electric field created by the balloon at a location 1 m due north of the balloon, we can use Coulomb's law. Coulomb's law states that the electric field (E) created by a point charge is given by the equation E = k * (Q / r^2), where k is Coulomb's constant, Q is the charge, and r is the distance from the charge.

Given that the charge of the balloon is -2 × 10^(-9) C and the distance from the balloon is 1 m, we can substitute these values into the equation:

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A traveler first drives 18.6 km east, then 30.3 km southeast, and finally 10.7 km south. Find the traveler's total displacement ?

Answers

If a traveler first drives 18.6 km east, then 30.3 km southeast, and finally 10.7 km south then the traveler's total displacement would be 51.30 kilometers.

What is displacement?

An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard. Displacement describes this shift in location.

As given in the problem If a traveler first drives 18.6 km east, then 30.3 km southeast, and finally 10.7 km south then we have to find the traveler's total displacement,

the total displacement in the east direction = 18.6 + 30.3Cos45°

the total displacement in the east direction = 40 km

the total displacement in the south direction = 10.7 + 30.3Cos45°

the total displacement in the south direction = 32.12 km

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Thus, the traveler's total displacement comes out to be 51.30 kilometers.

Learn more about displacement here, refer to the link;

brainly.com/question/10919017

#SPJ2
East: 18.6+30.3/(sqrt2)
South: 19.7+30.3/(sqrt2)
Total displacement: sqrt(east^2+south^2) is 57.3 km

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