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3 years ago

3. A ball thrown vertically upward returns to its starting point in 4s. Find its initial speed. [4]

Physics

1 answer:

Alinara [238K]3 years ago

6 0

Answer:

9.8 ×4 equal 39.2 m/s This is v intial

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A race car rounding a corner at a constant speed of 200 miles per hour.

ICE Princess25 [194]

Answer:

Yes since it is changing direction

Explanation:

A race car rounding a corner at a constant speed of 200 miles per hour

6 0

2 years ago

Atoms in a solid are not stationary, but vibrate about their equilibrium positions. Typically, the frequency of vibration is abo

hoa [83]

To develop this problem it is necessary to use the equations of description of the simple harmonic movement in which the acceleration and angular velocity are expressed as a function of the Amplitude.

Our values are given as

$f = 4.11 *10^{12} Hz$

$A = 1.23 * 10^{-11}m$

The angular velocity of a body can be described as a function of frequency as

$\omega = 2\pi f$

$\omega = 2\pi 4.11 *10^{12}$

$\omega=2.582*10^{13} rad/s$

PART A) The expression for the maximum angular velocity is given by the amplitude so that

$V = A\omega$

$V =( 1.23 * 10^{-11})(2.582*10^{13})$

$V = = 317.586m/s$

PART B) The maximum acceleration on your part would be given by the expression

$a = A \omega^2$

$a =( 1.23 * 10^{-11})(2.582*10^{13})^2$

$a= 8.2*10^{15}m/s^2$

4 0

3 years ago

Explain using physics vocabulary WHY the volume increases as the temperature increases.

Sveta_85 [38]

Answer:

P V = n R T ideal gas equation

V = k T where k = a constant and equals k = n R / P

V is proportional to T when other factors are constant

4 0

2 years ago

What’s the dependent variable?

Nikolay [14]

Answer: number of bacteria

Explanation:

A easier way. I like to remember it is that x axis = independent and yaxis = dependent variable, but if that doesn’t help think about this

Why would the number of bacteria effect the amount of time. It doesn’t make sense because time goes on forever and nothing can change about it but time can change the number of bacteria because if you had a timer of 30 seconds and the bacteria is for example 10 and if you had a timer of one minute then the number of bacteria change because of time, if you flip it, it doesn’t make sense

3 0

3 years ago

How can scientific phenomena be used in design?

Alex73 [517]

I’m not really sure I’m sorry

4 0

2 years ago