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3 years ago

If anyone could help.. im not the smartest

Physics

1 answer:

IRINA_888 [86]3 years ago

7 0

Answer: D
Reason: the top of the hammer has to be strong enough to hit the nail without damaging the top of the hammer

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The thrust from a car is 2000 N. The air resistance and friction together total 680 N. What happens to the speed of the car?

zheka24 [161]

The car will speed up because if the air resistance and friction forces are reacting in the direction opposite to the Applied force, The Net force will still be in the direction of the car's motion and since F=ma a will cause your velocity to increase

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3 years ago

What is the period of a wave if the wavelength is 100 m and the speed is 200 m/s?

Stells [14]

This is simple question and easy to understand.
so first you use a formula to calculate frequency of the wave.
v _ stands for velocity a.k.a speed
f_ stands for frequency which you have to find.
(pronounced lemda)_ stands for wavelength.
Then you gonna place all your values according to you have in the formula as shown then solve for f.
Finally, you use the time formula
where
T_ is period a.k.a time which equal to the reciprocal of frequency or equal to 1/f.
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3 years ago

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A jumbo jet has a mass of 100,000 kg. The thrust of each of its four engines is 50,000 N. What is the jet's acceleration in mete

lorasvet [3.4K]

Answer:

The acceleration is $a =2\ m/s^2$

Explanation:

From the question we are told that

The mass of the jumbo jet is $m_j = 100000\ kg$

The thrust is $F_k = 50000 \ N$

Generally given that the jet has four engines the total thrust is

$F_t = 4 * F_k$

substituting values

$F_t = 4 * 50000$

$F_t = 200000 \ N$

Generally the acceleration of the is mathematically represented as

$a = \frac{F_t}{m}$

substituting values

$a =2 \frac{N}{kg}$

Now

$N = kg \cdot m/s^2$

Hence

$a =2 \frac{kg * \cdot m/s^2}{kg}$

$a =2\ m/s^2$

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3 years ago

You have a large flashlight that takes 4 D-cell batteries, each with a voltage of 1.5 volts. If the current in the flashlight is

Naddik [55]

Ohm's law states that,
V = I x R
where V, I, and R are voltage, current, and resistance, respectively. Rearranging the equation gives,
R = V / I
Replacing the variables with the given values,
R = 1.5 volts / 2.0 amp
The answer is letter B. 0.75 ohms.

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3 years ago

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Please helppppppppppppp

artcher [175]

The ball's initial velocity must be 28.0 m/s

Explanation:

The motion of the ball in this problem is a projectile motion, so it follows a parabolic path, consisting of two separate motions:

- A uniform motion (constant velocity) along the horizontal direction

- An accelerated motion with constant acceleration (acceleration of gravity) in the vertical direction

First, we study the vertical motion of the ball: since it is a uniformly accelerated motion, we can use the suvat equation to find the time it takes for the ball to reach the ground,

$s=ut+\frac{1}{2}at^2$