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Anastasy [175]
3 years ago
14

Which waves are electromagnetic and can travel through a vacuum?

Physics
1 answer:
labwork [276]3 years ago
5 0
Light and heat waves
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What is the average velocity of a car starting from 0 and travels 7 meters in 9 seconds?
Leni [432]

Your question has been heard loud and clear.

Averge velocity formula=  Total distance travelled / total time taken.

Total distance=7meters

Total time taken=9 seconds.

Average velocity = 7/9= 0.77 metres/second

Average velocity= 0.77m/s

Thank you.

5 0
4 years ago
Pls help me to draw it . I will make you brianliest ​
LUCKY_DIMON [66]
I can’t do that you have to!
5 0
3 years ago
What is a lenticular (S0) galaxy? A galaxy with a disk and central bulge like a spiral galaxy, but with no spiral arms A galaxy
RSB [31]

Answer:

A galaxy with a disk and central bulge like a spiral galaxy, but with no spiral arms

Explanation:

A Lenticular galaxy is a kind of galaxy intermediate between elliptical galaxy and a spiral galaxy in the Morphological classification system of galaxies. They have a central bulge or disc just like a Spiral galaxy but lacks the arms of spiral galaxy. If looked edge on they appear to be spiral and if looked face on they appear to be elliptical.

The absence of spiral arms can be attributed to the absence of star formation. They mainly consists of ageing stars.

6 0
4 years ago
Find the net rate of heat transfer by radiation in watts from a skier standing in the shade, given the following. She is complet
fomenos

Answer:

-34.5 W

Explanation:

rate of heat transfer = Stefan-Boltzmann constant x emissivity x surface area x temperature^4

P = \alpha eA(T_{f} ^{4}- T_{i} ^{4}) = 5.67*10^{-8} *0.205*1.5(256^{4} - 284.4^{4} ) = -34.5 W

6 0
3 years ago
CYCLONE SAFETY MEASURES
Slav-nsk [51]

Answer:

Below are NDMA's recommended safety measures:

Ignore rumours, Stay calm, Don't panic.

Keep your mobile phones charged for emergency communication; use SMS.

Listen to the radio, watch TV, read newspapers for weather updates.

Keep cattle/animals untied to ensure their safety.

5 0
3 years ago
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