2 years ago

Write T if the statement is True and F if it is false and correct the false statement.

Physics

1 answer:

kipiarov [429]2 years ago

3 0

Answer:

1=f 2=t 3=f 4=t

Explanation:

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An automobile with an initial speed of 4.92 m/s accelerates uniformly at the rate of 3.2 m/s2 . Find the final speed of the car

Rudik [331]

Answer:19.32 m/s

Explanation:

Given

initial speed of car(u)=4.92 m/s

acceleration(a)= $3.2 m/s^2$

Speed of car after 4.5 s

using equation of motion

v=u+at

$v=4.92+3.2\times 4.5=4.92+14.4$

v=19.32 m/s

Displacement of the car after 4.5 s

$v^2-u^2=2as$

$19.32^2-4.92^2=2\times 3.2\times s$

$349.05=2\times 3.2\times s$

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3 years ago

A battery supplies E volts to a circuit containing a resistor R. How could the current in the resistor be increased? Select all

anastassius [24]

Answer:

I=V/R

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3 years ago

The position of a 55 g oscillating mass is given by x(t)=(2.0cm)cos(10t), where t is in seconds. determine the velocity at t=0.4

NNADVOKAT [17]

The position of the mass is given by (in cm):
$x(t)=2 \cos (10 t)$
The velocity is the derivative of the position:
$v(t) = \frac{dx(t)}{dt} =-10\cdot 2 \sin (10t)=-20 \sin (10t)$
Substituting t=0.40 s, we can find the velocity at this time:
$v(0.40 s)= -20 \sin (10 \cdot 0.4)=15 cm/s=15 \cdot 10^{-2}m/s$

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3 years ago

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Murljashka [212]

Answers

1.) non-polar

2.) non-polar

3.) Polar

4.) Polar

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Polar molecules is the separation of electric charges, having one positive end and another negative end.

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3 years ago

A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.00 s for the

Kay [80]

To answer this problem first is to analyze and understand the problem first and then consider the given and also the gravity that is exert in the ball. Base on my calculation and the use of the formulas the answer are the following:
A. The initial velocity is <span>29.43 m/s
b. The height it reaches is 132.435m</span>

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3 years ago