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3 years ago

9

A softball is fouled off with a vertical velocity of 20 m/s and a horizontal velocity of 15 m/s. what is the resultant velocity

of the ball

1 answer:

raketka [301]3 years ago

8 0

25 m/s is the answer

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_____ is the horizontal change between two points on the line.

sattari [20]

The horizontal change between two points on a graph is called the 'run'.

The vertical change between two points is called the 'rise'.

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3 years ago

Read 2 more answers

A 200 kg object is initially at rest on a horizontal frictionless surface. At time t = 0 , a horizontal force of 100 N applied t

s344n2d4d5 [400]

Answer:

b

Explanation:

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3 years ago

Each of the following statements is arguably true of thermometers. Which of them is most helpful to keep in mind if you are cond

Lera25 [3.4K]

Answer:

The temperature reported by a thermometer is never precisely the same as its surroundings

Explanation:

In this experiment to determine the specific heat of a material the theory explains that when a heat interchange takes place between two bodies that were having different temperatures at the start, the quantity of heat the warmer body looses is equal to that gained by the cooler body to reach the equilibrium temperature. <u>This is true only if no heat is lost or gained from the surrounding.</u> If heat is gained or lost from the surrounding environment, the temperature readings by the thermometer will be incorrect. The experimenter should therefore keep in mind that for accurate results, the temperature recorded by the thermometer is similar to that of the surrounding at the start of the experiment and if it differs then note that there is either heat gained or lost to the environment.

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3 years ago

While taking off from an aircraft carrier, a jet starting from rest accelerates uniformly to a final speed of 40. meters per sec

mariarad [96]

The acceleration of the jet is $11.4 m/s^2$

Explanation:

Since the jet motion is a uniformly accelerated motion (=constant acceleration), we can use the following suvat equation:

$v^2-u^2=2as$

where

v is the final velocity

u is the initial velocity

a is the acceleration

s is the displacement

For the jet in this problem, we have

u = 0 (it starts from rest)

v = 40 m/s (final velocity)

s = 70 m (length of the runway)

Solving for a, we find the acceleration:

$a=\frac{v-u}{t}=\frac{40^2-0}{2(70)}=11.4 m/s^2$

Learn more about acceleration:

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3 years ago

A simple cyanine dye molecule has a long central carbon chain, with a total of 8 bonds, between the two nitrogen atoms. One elec

wariber [46]

Answer:

For one dimensional box

E= $n^{2}h^{2}/ 8mL^{2}$

For lowest energy transition will be from n =1 to n=2

Hence,

$hc/\lambda = 2^{2}h^{2}/ 8mL^{2} - h^{2}/8mL^{2}$

h= 6.626 *10-34 J.s

m = 9.31 *10-31 Kg

L= 0.14 * 10-9 m

c= 3 *108 m/s

$\lambda = 8*c*m*L^{2} / 3*h$

$\lambda = 22 nm$

Not in visible range

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3 years ago