You take a running jump off the end of a diving platform at a speed of 7 m/s and splash into the water 1.5 seconds later.a.) How far horizontally do you land from your takeoff point?
b.) How high is the diving platform?

Answers

Answer 1

Answer: Part a

Just use v=d/t

d = vt
d = 7 x 1.5

For part b

Vf=Vi +at
Vf=0 + (9.8)(1.5)

d= ((Vi + Vf) /2) x t
d = ((0 + Vf) /2) x 1.5

In second equation, use Vf found in first equation

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The moon's mass is 7.35 × 1022 kg, and it moves around the earth approximately in a circle or radius 3.82 × 105 km. The time required for one revolution is 27.3 days. Calculate the centripetal force that must act on the moon. How does this compare to the gravitational force that the earth exerts on the moon at that same distance?

Answers

Explanation:

It is given that,

Mass of moon, $m=7.35* 10^(22)\ kg$

Radius of circle, $r=3.82* 10^(5)\ km=3.82* 10^(8)\ m$

The time required for one revolution is 27.3 days, t = 27.3 days

1 day = 86400 seconds

27.3 days = 2358720 seconds

Let v is the speed of moon around the circular path. It is given by :

$v=(2\pi r)/(T)$

$v=(2\pi * 3.82* 10^(8)\ m)/(2358720\ s)$

v = 1017.57 m/s

Let F is the centripetal force acting on the moon. It is given by :

$F=(mv^2)/(r)$

$F=(7.35* 10^(22)\ kg* (1017.57\ m)^2)/(3.82* 10^(8)\ m)$

$F=1.99* 10^(20)\ m/s^2$

So, the centripetal force that must act on the moon is $1.99* 10^(20)\ m/s^2$ . The gravitational force that the earth exerts on the moon at that same distance is also equal to $1.99* 10^(20)\ m/s^2$ . Hence, this is the required solution.

The mc002-1.jpgHrxn of formation of carbon dioxide is negative. Which statement is true?

Answers

When the formation of carbon dioxide is negative, it means that it releases heat to the surroundings. When it releases heat to the surroundings, the reaction is exothermic.

Imagine that current is flowing couterclockwise around a squre loop of wire in front of you

Answers

Answer: The loop's right side approaches you.

Cellular telephones use what type of wave?

Answers

Cellphones use radio frequency waves to transmit sound through the speaker and the microphone. The radio frequency energy that is given off by cell phones is a type of electromagnetic energy.
I hope I helped! =D

cellular telephones use radio frequency waves

calculate the period of a wave whose frequency is 5 Hertz and whose wavelength is one centimeter give your answer in a decimal form

Answers

The period of the wave is the reciprocal of its frequency.

1 / (5 per second) = 0.2 second .

The wavelength is irrelevant to the period. But since you
gave it to us, we can also calculate the speed of the wave.

Wave speed = (frequency) x (wavelength)

= (5 per second) x (1cm) = 5 cm per second

Which is an example of velocity?A. A pickup driving 30 km in 20 minutes
B. A car slowing down on a sharp curve
C. An airplane traveling 450 km/h
D. An 18 wheeler driving west at 50 km/h
PLZ help