PHYSICS HIGH SCHOOL

Which of the following is the SI unit for volume?a. meter
c. density
b. liter
d. grams

Answers

Answer 1
Answer:

Which of the following is the SI unit for volume?

a. meter

c. density

b. liter

d. grams

The Answer Is B. Liter
Answer 2
Answer:

Answer:

B

Explanation:

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1) A sound wave with a frequency of 300 hertz is traveling through a medium at a speed of 320 meters/second. What is its wavelength? 2) A sound wave has a wavelength of 0.450 meters. If its speed in cold air is 330 meters/second, what is the wave's frequency? a.0.890hertz b.100hertz c.230hertz d.733

Streams of electrically charged particles flowing at high speeds from the sun make up the

Answers

That's the so-called 'solar wind'.

The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 67 m when wurth (jaw6696) – Ch 2 LT 3/4 – kreft – (61920) 2 thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m.

Answers

Answer:

402m

Explanation:

We can solve this easily by using the free fall formula:

v_f^2=v_0^2+2ad

On both cases the final velocity will be 0m/s (maximum height), so we have:

v_0^2=-2ad

We know that the velocity the person imparts to the ball will be the same either on Earth or on the Moon, so we write for both cases:

v_0^2=-2a_Ed_E

v_0^2=-2a_Md_M

Which means

2a_Ed_E=2a_Md_M

So we get (taking into account that gravity on earth is 6 times gravity on the Moon):

d_M=(a_Ed_E)/(a_M)=(6a_Md_E)/(a_M)=6d_E=6(67m)=402m

A friend tosses a baseball out of his second floor window with initial velocity of 4.3m/s(42degrees below the horizontal). The ball starts from a height of 3.9m and you catch the ball 1.4m above the ground.a) Calc the time the ball is in the air (ans. 0.48s)
b)Determine your horisontal distance from window (ans. 1.5 m)
c)Calc the speed of ball as you catch it (ans: 8.2m/s)

I dont get what 42 m below the horizontal is, can someone give me direction on how to do this?

Answers

Answer:

Part a)

t = 0.48 s

Part b)

x = 1.5 m

Part c)

v = 8.23 m/s

Explanation:

As we know that the velocity of ball is

v = 4.3 m/s

now the two components of velocity is given as

v_x = 4.3 cos42 = 3.19 m/s

v_y = 4.3 sin42 = 2.88 m/s

Part a)

now in Y direction we will have

y = y_o + v_y t + (1)/(2)gt^2

1.4 = 3.9 - 2.88 t - 4.9 t^2

so we have

t = 0.48 s

Part b)

Now the distance covered by the ball in horizontal direction is given as

x = v_x t

x = 3.19 * 0.48

x = 1.5 m

Part c)

speed in x direction will always remain the same

so we have

v_x = 3.19 m/s

speed in y direction is given as

v_y = v_i + at

v_y = 2.88 + (9.8)(0.48)

v_y = 7.58 m/s

So final speed will be

v = √(v_x^2 + v_y^2)

v = 8.23 m/s

Which of the following sensory receptors would lead you to squint in bright light?. A. thermoreceptors B. mechanoreceptors C. photoreceptors D. chemoreceptors

Answers

If my memory serves me well, sensory receptors which would lead you to squint in bright light are called C. photoreceptors

Every 10 seconds a pendulum completes 2 cycles. what are the period and frequency of this pendulum

Answers


If it completes 2 cycles in 10 seconds, then each cycle
takes 5 seconds.  That's the period.

Frequency = 1 / period = 1 / 5 sec = 0.2 per sec = 0.2 Hz.


period 5 sec = 1 cycle
f = 1/period
.2

Would you rather drink a hot beverage from a metal cup or a ceramic cup

Answers

Hey there!
I would personally drink a hot beverage from a ceramic cup than a metal cup for various reasons.
Firstly, ceramic cups do not change the taste of the beverage, while in some cases, metal cups do.

Secondly, since metal conducts heat, it would be wise to drink a hot beverage from a ceramic cup. Heated metal can burn your fingers if touched.

(If you feel that my answer has helped you, please consider rating it and giving it a thank you! Also, feel free to make the best answer, the brainliest answer!)

Thank you! :D
Ceramic, since metals can sometimes change the taste.
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