PHYSICS HIGH SCHOOL

A dolphin leaps out of the water at an angle of 36.6° above the horizontal. The horizontal component of the dolphin's velocity is 7.87 m/s. Calculate the magnitude of the vertical component of the velocity.

Answers

Answer 1

Answer:

Answer:

Explanation:

Given

Dolphin leaps out an angle $\theta =36.6^(\circ)$

Horizontal component of dolphin velocity $u_x=7.87\ m/s$

Suppose u is the launch velocity of dolphin

therefore $u\cos \theta =u_x---1$

and vertical velocity $u_y=u\sin \theta ----2$

divide 1 and 2 we get

$\tan \theta =(u_y)/(u_x)$

$u_y=u_x\tan \theta$

$u_y=7.87\cdot \tan (36.6)$

$u_y=5.84\ m/s$

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Which type of electromagnetic radiation cannot be focused? A. Gamma rays
B. X-rays
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Answers

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an 11 ohm resistor and a 6 ohm resistor are connected in series with a battery. the potential difference across the 6 ohm resistor is 9 volts. find the potential difference across the battery

Answers

Two resistors in series are often called a 'voltage divider', because the
total voltage divides in proportion to the resistances.

The total resistance in the string across the battery is (11 + 6) = 17 ohms.

-- The full battery voltage appears across 17 ohms.
-- The voltage across the 11-ohms is (11/17) of the battery, and
-- the voltage across the 6-ohms is (6/17) of the battery.

(6/17) x (B) = 9 volts

Multiply each side by (17/6) : B = (9 volts) x (17/6) = 25.5 volts .

By the way, in case you care or are asked . . .

-- The current in the whole series loop is B/R = 25.5 / 17 = 1.5 Amperes
-- The power drawn from the battery is B²/R = (25.5)²/17 = 38.25 watts
-- The power dissipated by the 6-ohm resistor is V²/R = 9²/6 = 13.5 watts
-- The power dissipated by the 11-ohm resistor is I²R = (1.5)² (11) = 24.75W
-- (Check: 13.5W + 24.75W = 38.25W yay! )
-- If they're just composition units hanging out in the air, then both resistors
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Question 55. What subatomic particle has no electrical charge?
•neutron
•proton
•electron
•atom

Answers

Answer: A Neutron.

I know this is correct. Thank's and yw :3

Neutrons have no electrical charge

protons have a positive charge

electrons have a negative charge

Atoms mainly consist of a positively charged nucleus surrounded by one more negatively charged electrons, but overall the atom has no charge so it would neutral!

hope this helps!!

Which of the following is NOT an example of accelerated motion?A. an airplane taking off down a straight runway
B. a boulder falling off a cliff in a straight path
C. a ball being thrown straight up
D. a bicyclist moving in a straight line at a constant speed

Answers

Accelerated motion = any change in speed or direction.

A. No. The airplane's speed is increasing.

B. No. The boulder's speed increases as it falls.

C. No. The speed of the ball decreases as it approaches the peak,
then it changes direction, begins to move downward, and its speed
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D. Yes. The cyclist's speed and direction are not changing.

Final answer:

Accelerated motion refers to any motion with changing velocity, including changes in speed or direction. Most of the examples provided involve accelerated motion, except for the bicyclist moving in a straight line at a constant speed, as both speed and direction remain constant in such scenario.

Explanation:

In the context of physics, accelerated motion refers to any motion in which the velocity changes - either in magnitude (speed) or direction. This can be due to an increase or decrease in speed, or a change in direction. Examples of accelerated motion include an airplane taking off down a straight runway, a boulder falling off a cliff in a straight path, and a ball being thrown straight up.

However, a bicyclist moving in a straight line at a constant speed is NOT an example of accelerated motion. In this case, the speed (magnitude of velocity) and direction are both constant, and therefore there is no acceleration present.

Learn more about Accelerated Motion here:

brainly.com/question/2261259

#SPJ6

Movement that occurs along a straight line is called:

Answers

linear motion! hope i helped

Radio telescopes measure the galaxy’s distribution of

Answers

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hydrogen from which stars are formed

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