PHYSICS HIGH SCHOOL

Select all of the following that describes momentum, p [mark all correct answers] a. momentum is the product of mass and acceleration
b. momentum is the product of mass and speed
c. momentum is the product of mass and velocity
d. momentum is a scalar quantity
e. momentum is a vector quantity
f. momentum has unit of newton (N)
g. momentum has unit of kgm/s
h. momentum has unit of kgm2/s2
i. momentum has unit of joule (J)
j. momentum is one-half the product of mass and the square of the object's speed

Answers

Answer 1

Answer:

Answer:

c. Momentum is the product of mass and velocity

e. Momentum is a vector quantity

g. Momentum has unit of kgm/s

Explanation:

Linear momentum P

P = m .v

m =mass

v=Velocity

If mass take in kg and velocity is in m/s then momentum p will be in kg.m/s.

1. momentum is the product of velocity and mass.

2.Momentum is a vector quantity.

3.Momentum have kg.m/s unit.

So the following option are correct.

c. Momentum is the product of mass and velocity

e. Momentum is a vector quantity

g. Momentum has unit of kgm/s.

Note-

1.Joule is the unit of energy.

2.One-half the product of mass and the square of the object's speed is known as kinetic energy.

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Why are ceiling of concert hall and conference halls made curved?

Answers

The ceiling of a concert hall and conference halls are made curved so that the sound that emanates from the source will reflect to any point of the curve of these halls. Thereby, increasing the sound wave travelled across the hall.

IN a physics lab, a student discovers that the magnitude of the magnetic field at a certain distance from a long wire is 4.0μT. If the wire carries a current of 5.0 A, what is the distance of the magnetic field from the wire?

Answers

Answer:

0.25 m

Explanation:

The intensity of the magnetic field around a current-carrying wire is given by:

$B=(\mu_0 I)/(2 \pi r)$

where

$\mu_0 = 4\pi \cdot 10^(-7)Tm/A$ is the permeabilty of free space

I is the current

r is the distance from the wire

In this problem, we know:

$B=4 \mu T=4 \cdot 10^(-6) T$ is the magnetic field

$I=5.0 A$ is the current in the wire

Re-arranging the equation, we can find the distance of the field from the wire:

$r=(\mu_0 I)/(2 \pi B)=((4\pi \cdot 10^(-7))(5.0 A))/(2\pi(4\cdot 10^(-6) T))=0.25 m$

What is the momentum of a 75.0-kilogram defensive back chasing the fullback at a velocity of 5.00 m/sec.

Answers

Answer : The momentum is, 357 kg.m/s

Explanation :

Momentum : It is defined as the motion of a moving body. Or it is defined as the product of mass of velocity of an object.

Formula of momentum is:

$p=mv$

where,

p = momentum

m = mass = 75.0 kg

v = velocity = 5.00 m/s

Now put all the given values in the above formula, we get:

$p=75.00kg* (5.00m/s)=357kg.m/s$

Therefore. the momentum is, 357 kg.m/s

75 kg × 5 m/sec = 375 kgm/s

Hope this helps :)

2. A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to five times her weight as she goes through the dip. Of r = 21.5 m, how fast is the roller coaster traveling at the bottom of the dip?

Answers

Answer: $v=√(4gr)$

Explanation:

Given

Passenger feels the seat of the car Pushing upward with a force equal to five times her weight

Therefore

$N-mg=(mv^2)/(r)$

it is given $N=5mg$

where N=normal reaction

$5mg-mg=(mv^2)/(r)$

thus $v=√(4gr)$

A car initially at rest, accelerates at a constant rate of 4.0 m/s for 6s. How fast will the car be traveling at 6s

Answers

it will be traveling exactly 24 miles per hour

Final answer:

The final velocity of the car can be found using the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time. Plugging in the given values, we find that the car will be traveling at 24 m/s at 6 seconds.

Explanation:

To find the final velocity of a car accelerating at a constant rate, we can use the equation:
v = u + at

Where:
v is the final velocity, u is the initial velocity (which is zero in this case), a is the acceleration (4.0 m/s²), and t is the time (6 seconds).

Plugging in the values, we get:
v = 0 + (4.0 m/s²)(6s) = 24 m/s

Therefore, the car will be traveling at 24 m/s at 6 seconds.

Learn more about Calculating final velocity of a car here:

brainly.com/question/17799150

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True or False, a sonographer can adjust the duration of an acoustic pulse since it depends upon the pulse's propagation speed.

Answers

Answer: True

Explanation: A sonographer can adjust the duration of an acoustic pulse because it depends on the pulse's propagation speed.

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