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3 years ago

Which type of wave can only be transmitted through matter?

Physics

2 answers:

Doss [256]3 years ago

8 0

I only doing this for points, but i think its c

IgorLugansk [536]3 years ago

3 0

It’s c i did it on my online school

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The speed of light in a vacuum is 2.998 x 108 m/s. what is its speed in km/h?

Artemon [7]

1079252848.8 kilometer per hour

7 0

3 years ago

A baseball approaches home plate at a speed of 44.0 m/s, moving horizontally just before being hit by a bat. The batter hits a p

Luda [366]

Explanation:

It is given that,

Speed of the baseball, u = 44 m/s

Speed of the baseball, v = 53 m/s

Mass of the ball, m = 145 g = 0.145 kg

Time of contact between the ball and the bat, t = 2.2 ms = 0.0022 s

$F=ma$

$F=\dfrac{mv}{t}$

$F_1=\dfrac{0.145\ kg\times 44\ m/s}{0.0022\ s}$

F₁ = 2900 N...........(1)

$F=ma$

$F=\dfrac{mv}{t}$

$F_2=\dfrac{0.145\ kg\times 53\ m/s}{0.0022\ s}$

F₂ = 3493.18 N.........(2)

In average vector form force is given by :

$F=F_1+F_2$

$F=(2900i+(-3493.18)\ N$

$F=(2900i-3493.18j)\ N$

Hence, this is the required solution.

6 0

4 years ago

What muscle movement do we use to close a joint.

marin [14]

Answer: Your using your skeletal muscle

Explanation:

3 0

3 years ago

A pulley with a radius of 3.0 cm and a rotational inertia of 4.5 x 10^-3 kg∙m2 is suspended from the ceiling. A rope passes over

solmaris [256]

Answer:

maximum kinetic energy is for Pulley

e) The pulley

Explanation:

Let 4 kg block is moving downwards with speed "v" so we can say that 2 kg block will move upwards with same speed "v"

Now we know that pulling is in pure rotational motion

so we will have

$\omega = \frac{v}{R}$

$\omega = \frac{v}{0.03}$

now kinetic energy of each is given as

For 4 kg block

$K_1 = \frac{1}{2}(4)(v^2) = 2v^2$

for 2 kg block

$K_2 = \frac{1}{2}(2)(v^2) = v^2$

For pulley

$K_3 = \frac{1}{2}I\omega^2$

$K_3 = \frac{1}{2}(4.5\times 10^{-3})\frac{(v^2)}{0.03^2}$

$K_3 = 2.5 v^2$

So maximum kinetic energy is for Pulley

3 0

3 years ago

Perform the calculation and report your answer using sig figs. 657.70 - 26.543

Anton [14]

Answer:

The answer is 631.157

Explanation:

The question requested that the answer to the subtraction of 26.543 from 657.70 must be written using significant figures.

Here are a few tips about how to Identify significant figures.

1) It should be noted that the number "0" is what is usually (but not always) affected while trying to identify significant figures. Hence, all other numbers/digits are always significant. For example, 26.543 has five significant figures.

2) The zeros found between these "other numbers/digits" are also significant. For example, 2202 has four significant figures.

3) In the case of a decimal, the tailing zeros or the final zero is also significant. 657.70 and 657.07 have five significant figures.

Now, back to the question

657.70 - 26.543 = 631.157.

Our final answer does not have a zero, hence all the digits (six) are significant.

8 0

3 years ago