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Lorico [155]
3 years ago
13

A ball is thrown upward and let fall down a building. Another identical ball was dropped straight down the building at the same

time with the same initial speed as the first ball. How will the velocities of these two balls compare when they each hit the ground? Justify your response.
Physics
1 answer:
marysya [2.9K]3 years ago
7 0

Answer:

same velocity

Explanation:

energy is conserved-

KE=PE

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How do you find the speed of an electromagnetic wave? Multiply the wavelength by the frequency. Dvide the frequency by the wavel
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Answer:

Multiply the wavelength by the frequency.

Explanation:

The velocity of a wave is the frequency times the wavelength.

8 0
4 years ago
Which of these is the most likely prediction that the meteorologist would make about the weather? There is a possibility of
riadik2000 [5.3K]

Answer:

B. Dust storm

Explanation:

A meteorologist would predict dust storm most likely. Before dust storm the air condition and air pressure reduces in the particular area which indicate towards a dust storm. As pressure of a region reduces the air of the neighboring area try to maintain that pressure and rush towards low pressure area and causes dust storm.

6 0
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The continental crust covers _______ of the earth’s surface.
cestrela7 [59]
40% of the Earth's surface is covered by continental crust.
8 0
3 years ago
Read 2 more answers
To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. In one such ep
I am Lyosha [343]

Answer:

Part a)

\theta = 48 degree

Part b)

v = 13.45 m/s

Explanation:

Part a)

mass of the Falcon bird is given as

m = 600 g

initial speed of the bird is

v_i = 20 m/s

final speed of the bird is given as

v_f = 5 m/s (opposite direction)

So here the impulse given by falcon bird is given as

I = m(v_f - v_i)

I = 0.600(20 + 5)

I = 15 kg m/s

now the final momentum of Raven bird in perpendicular direction is given as

I = mv_y

15 = 1.50 v_y

v_y = 10 m/s

now the change in the angle of the raven bird is given as

tan\theta = \frac{v_y}{v_x}

tan\theta = \frac{10}{9}

\theta = 48 degree

Part b)

Final speed of the raven bird is given as

v^2 = v_x^2 + v_y^2

v^2 = 9^2 + 10^2

v = 13.45 m/s

5 0
3 years ago
1. What is work done in holding a 15kg suitcase while waiting for a bus for 15 minutes?
Tems11 [23]
Work is (force applied) x (distance through which the force moves).

Since the suitcase doesn't move up or down during the 15 minutes,
no work is done ... zero, zip, nada ... according to the real Physics
definition of 'work'.
6 0
3 years ago
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