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3 years ago

HELP ME PLZ I NEED TO PASS

Physics

2 answers:

Varvara68 [4.7K]3 years ago

6 0

Answer:

50 newtons

Explanation:

subtract directions

ipn [44]3 years ago

5 0

Answer:

D. 50 N

Explanation:

The 2 forces of the cart will counteract each other because they are being pushed in opposite directions. The 150 N will counteract the 150 N on the other side. But since there's an extra 50 N on the left, it will push 50 N to the right. The 2 150 N will do nothing because they are pushing in opposite directions. For example, if two people are pushing something in the opposite direction with the exact same force, the pushed object won't move.

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What physics principle is used in radar guns to find the speeds of tennis balls and baseballs at sporting events?

Luda [366]

<h2>Answer: Doppler effect </h2>

Explanation:

A radar gun (also known as a Doppler radar) uses the Doppler effect when measuring "return echoes" after having sent a microwave signal (a type of electromagnetic radiation).

In this context the Doppler effect consists of the change in a wave perceived frequency when the emitter of the waves, and the observer move relative to each other.

In the case of radars, a microwave signal is sent to a target (the tennis or baseball in this case) and then is reflected after "hitting" the target, so that the radar system measures this difference between the sent signal and the reflected signal.

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3 years ago

What are distinct layers caused by

Romashka [77]

Answer:

Seasonal Changes

Explanation:

because over time snow gets soaked into other layers and the rocks pile over time from landslide

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4 years ago

The laboratory exercise for this chapter addresses kinematic motion. You have experienced these motions in everyday life. Instea

ki77a [65]

Answer:

A) vectors: veloicty, force

scalar: speed, work

B) t = 1.75 s, C) v = - 17 2 m / s

Explanation:

We answer each part separately

A) A vector magnitude has magnitude and direction instead a scalar magnitude has only magnitude

vector quantities: the speed of a car number is the magnitude and direction is where it goes

Force, the number is the magnitude and above that applies gives direction

Scalar magnitude: how quickly the number of the speedometer of the car

Temperature, work

B) I = 15 m height to the soil and get to calculate time = 0

y = y₀ + v₀ t - ½ g t²

as the ball is loose its initial velocity is zero

0 = 0 +0 - ½ g t²

t = $\sqrt{2y_o/g}$

t = $\sqrt{2 \ 15/ 9.8}$

t = 1.75 s

C) the velocity to the reach the floor

v = vo - g t

v = 0 - g t

v = - 9.8 1.74

v = - 17 2 m / s

The negative signt iindicates that the speed goes down

5 0

3 years ago

A coil consists of 180 turns of wire. Each turn is a square of side d=30 cm, and a uniform magnetic field directed perpendicular

alexira [117]

Answer:

Emf induced i equal to 329.4 volt

Explanation:

Note : Here i think we have to find emf induced in the coil

Number of turns in the coil N= 180

Sides of square d = 30 cm = 0.3 m

So area of the square $A=0.3\times 0.3=0.09m^2$

Magnetic field is changes from 0 to 1.22 T

Therefore $dB=1.22-0=1.22T$

Time interval in changing the magnetic field dt = 0.06 sec

Induced emf is given by

$e=-N\frac{d\Phi }{dt}=-NA\frac{dB}{dt}$

$e=-180\times 0.09\times \frac{1.22}{0.06}=329.4volt$

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4 years ago

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stiks02 [169]

Answer:

the answer is c i think...

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