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3 years ago

Both X-rays and gamma rays have higher frequencies than ultraviolet rays True or False

Physics

2 answers:

Masja [62]3 years ago

8 0

I’m pretty sure the answer is true

mamaluj [8]3 years ago

7 0

Answer:

i believe its True

Explanation:

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Part 1: A rope has one end tied to a vertical support. You hold the other end so that the rope is horizontal. If you move the en

Anit [1.1K]

1) c. 2 m/s

Explanation:

The relationship between frequency, wavelength and speed of a wave is

$v=\lambda f$

where

v is the speed

$\lambda$ is the wavelength

f is the frequency

For the wave in this problem,

f = 4 Hz

$\lambda=0.5 m$

So, the speed is

$v=(0.5 m)(4 Hz)=2 m/s$

2) a. 2.8 m/s

The speed of the wave on a string is given

$v=\sqrt{\frac{T}{\mu}}$

where

T is the tension in the string

$\mu$ is the linear mass density

In this problem, we have:

$T=2 \cdot 4 N=8 N$ (final tension in the rope, which is twice the initial tension)

$\mu = 1 kg/m$ --> mass density of the rope

Substituting into the formula, we find

$v=\sqrt{\frac{8 N}{1 kg/m}}=2.8 m/s$

5 0

3 years ago

An automobile tire having a temperature of −1.5 ◦C (a cold tire on a cold day) is filled to a gauge pressure of 26 lb/in2 . What

Salsk061 [2.6K]

Answer: $32.22\ lb/in^2$

Explanation:

Given

Temperature on the hot day $T_i=-1.5^{\circ} C\approx 271.5\ K$

Gauge Pressure $P_i=26\ lb/in^2$

When Temperature rises to $T_f=40^{\circ}C\approx 313\ K$ on a hot day then

absolute pressure is let say $P_f$

Using ideal gas equation we can write

$\Rightarrow \frac{PV}{T}=constant$

as volume is constant therefore

$\Rightarrow \frac{P}{T}=constant$

$\Rightarrow \frac{26+14.7}{271.5}=\frac{P_f}{313}$

$\Rightarrow P_f=46.92\ lb/in^2$

Gauge Pressure is given by

$\Rightarrow 46.92-14.7=32.22\ lb/in^2$

6 0

3 years ago

Heat always transfers from substances with _____ thermal energy to substances with _______ thermal until both substances reach t

Reika [66]

Heat always transfers from substances with high thermal energy to substances with low thermal until both substances reach the maximum temperature

4 0

2 years ago

In what factors sound can be heard

MariettaO [177]

Explanation:

Loudness of sound is a measure of response of sound to our ear. Loudness of sound is not simply the energy reaching the human ear, but it also tells about the sensitivity of human ear detecting this energy. Loudness of sound is measured in decibel (dB). As energy reaching the ear depends on square of amplitude, loudness of sound depends on various factors namely,

(i) Amplitude of sound waves

(ii) Sensitivity of ear

(iii) Distance from the source of the sound and the listener.

6 0

3 years ago

Read 2 more answers

A 1280 kg car is moving 4.92 m/s. a 509 N force then pushes it forward for 28.7 m. what is its final KE?(unit=J)PLEASE HELP

laila [671]

Answer:

The answer to your question is: total energy = 30100.4 J

Explanation:

Kinetic energy (KE) is the energy due to the movement of and object, its units are joules (J)

Data

mass = 1280 kg

speed = 4.92 m/s

Force = 509 N

distance = 28.7 m

Formula

$KE = \frac{1}{2} mv^{2}$

Work = Fd

Process

- Calculate Kinetic energy

- Calculate work

- Add both results

KE = $\frac{1}{2} (1280)(4.92)^{2}$

KE = 15492.1 J

Work = (509)(28.7)

Work = 14608.3 J

Total = 15492.1 + 14608.3

Total energy = 30100.4 J

8 0

3 years ago

Read 2 more answers