Which is caused when constructive interference occurs in sound waves?a. louder beats
b. no disturbance
c. softer noises
d. no sounds

Answers

Answer 1

Answer:

When constructive interference occurs in sound waves, it will causelouder beats. The answer is letter A. This is because the waves of the samefrequency travel in the same direction. This enables the waves to add up havingthe same frequency and direction but with greater amplitude.

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Who first arranged the elements according to atomic mass and noticed a periodic recurrence of their physical and chemical properties?A. Henry Moseley
B. Antoine Lavoisier
C. John Dalton
D. Dmitri Mendeleev

Answers

Dmitri Mendeleev is the person who first arranged the elements according to atomic mass and noticed a periodic recurrence of their physical and chemical properties. The answer is letter D.

An opaque material absorbs some light frequencies that shine on it and reflects others. True False please help me

Answers

The answer is true because everything obsorbes light.

Sally travels by car from one city to another. She drives for 30.0 min at 80.0 km/hr, 12.0 min at 105.0 km/hr, and 45.0 min at 40.0 km/hr, and she spends 15.0 min eating lunch and buying gas. A. Determine the average speed for the trip.
B. Determine the total distance traveled.

Answers

Answer:

A) The average speed for the trip is $v_(average) =53,53(km)/(h)$ .

B) The total distance traveled is $d_(total)=91\ km$ .

Explanation:

Knowing that 1 hour has 60 minutes, we have that for each part of the trip:

$v_(1)=80(km)/(h)\ t_(1)=0,5\ h$

$v_(2)=105(km)/(h)\ t_(2)=0,2\ h$

$v_(3)=40(km)/(h)\ t_(3)=0,75\ h$

$v_(4)=0(km)/(h)\ t_(4)=0,25\ h$

Total distance traveled

The distance traveled is the speed multiplied by a period of time. The total distance traveled is calculated adding up the speeds multiplied by the given periods of time.

$d_(total)=d_(1)+d_(2)+d_(3)$

$d_(total)=v_(1).t_(1)+v_(2).t_(2)+v_(3).t_(3)$

$d_(total)=80(km)/(h).0,5\ h+105(km)/(h).0,2\ h+40(km)/(h).0,75\ h$

$d_(total)=40\ km+21\ km+30\ km$

$d_(total)=91\ km$

B) The total distance traveled is $d_(total)=91\ km$ .

Average speed

The average speed could be calculated using the total distance traveled $d_(total)$ divided by the total time $t_(total)$ . We need to take into account the time spent eating lunch and buying gas.

$v_(average)=(d_(total))/(t_(total))$

$v_(average)=(v_(1).t_(1)+v_(2).t_(2)+v_(3).t_(3)+v_(4).t_(4))/(t_(1)+t_(2)+t_(3)+t_(4))$ $v_(average)=(91\ km)/(0,5\ h+0,2\ h+0,75\ h+0,25\ h)$

$v_(average)=(91\ km)/(1,70\ h)$

$v_(average)=53,53(km)/(h)$

A) The average speed for the trip is $v_(average) =53,53(km)/(h)$ .

Total distance = (30/60 x 80) + (12/60 x 105) + (45/60 x 40) = 0.5 x 80 + 0.2 x 105 + 0.75 x 40 = 40 + 21 + 30 = 91 km

Average distance = total distance / time taken = 91 / (30/60 + 12/60 + 45/60) = 91/ (0.5 + 0.2 + 0.75) = 91/1.45 = 62.76 km/hr

A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a forceA)of zero
b) of less than 600 N is the truck is slowing down
c) equal to 600 N only if the truck is moving at constant velocity
d) equal to 600 N no matter what the acceleration of the truck
e) greater than 600 N if the truck is accelerating

Answers

A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a force equal to 600 N no matter what the acceleration of the truck. Option c is correct.

What is Newton's third law of motion?

According to Newton's third law of motion, every action has an equal and opposite reaction. As well as the action and reaction are always acted in pairs.

Based on the law of action-reaction,

A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a force greater than 600 N if the truck is accelerating.

If the truck is moving at constant velocity the acceleration is zero resulting in no force exerted by the truck on the trailer

The force by which the transport truck pulls on a trailer is equal to the force by which the trailer pulls the truck.

F₁ is the force by which the transport truck pulls on a trailer

F₂ is the force by which the trailer pulls the truck

F₁=F₂

A 600N [E] pulling force is applied by a transport vehicle to a trailer. Regardless of the transport truck's acceleration, the trailer pulls on it with a force of 600 N.

To learn more about Newton's third law of motion refer to the link;

brainly.com/question/974124

#SPJ2

D because newton's third laws states for every force there is an equal and opposite force.

A 10-kilogram bicycle is traveling at a speed of 2 m/s. what is the bikes kinetic energy?

Answers

We have: K.E. = 1/2 mv²
Here: m = 10 Kg
v = 2 m/s

Substitute their values,
K.E. = 1/2 * 10 * 2²
K.E. = 1/2 * 10 * 4
K.E. = 20 J

In short, Your Answer would be 20 Joules

Hope this helps!

What is the kinetic energy of a 30 kg falling object when the object reaches a velocity of 20 m/s?