1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vladimir79 [104]
3 years ago
13

Fast Bullets A rifle with that shoots bullets at 420 m/s shoots a bullet at a target 49.8 m away. How high above the target must

the rifle barrel be pointed to ensure that the bullet will hit the target?
Physics
1 answer:
Nezavi [6.7K]3 years ago
8 0

Answer:

0.08°

Explanation:

velocity of projection, u = 420 m/s

Horizontal range, R = 49.8 m

Let the angle of projection is θ.

Use the formula for the horizontal range.

R=\frac{u^{2}Sin2\theta }{g}

49.8=\frac{420^{2}Sin2\theta }{9.8}

Sin 2θ = .0027

2θ = 0.1585

θ = 0.08°

You might be interested in
If the trend changed toward traditional (pre-World War II) families, how would that affect women’s rights?
LUCKY_DIMON [66]

If the trend changed toward traditional (pre-World War II) families, the women’s rights are employment in manufacturing sector.

<h3>What is World war?</h3>

The war between two countries to take over each other's kingdom using weapons to kill each other.

Before the world war, the army needs armor, weapons, guns and tanks. Their manufacturing is only possible with many workers to work for long hours. If the men are not enough, then women are given opportunities to work with them.

Thus, the women’s rights are employment in manufacturing sector when trend changed traditional families.

Learn more about world war.

brainly.com/question/1449762

#SPJ1

7 0
2 years ago
Energy input remains constant and voltage remains the same in a circuit, but current decreases. Which must be happening?
RUDIKE [14]
A) the resistance is increasing

Hope this helped!
6 0
3 years ago
Which statement describes why scientific notation is useful? It makes very small numbers into whole numbers. It converts fractio
disa [49]

It makes calculations with very large and small numbers easier.

Scientific notation is a system used in order to It makes calculations with very large and small numbers easier. It is useful as it allows very large number that would take a lot of space to write otherwise, and it allows them to be calculated easier. 10^{23} for example is a incredible large number, but written in this form is immediately understandable and useful for calculation.

3 0
3 years ago
Read 2 more answers
What requirement must a force acting on a object satisfy in order for the object to undergo simple harmonic motion?
viktelen [127]

Answer:

Simple harmonic motion is the movement of a body or an object to and from an equilibrium position. In a simple harmonic motion, the maximum displacement (also called the amplitude) on one side of the equilibrium position is equal to the maximum displacement.

The force acting on an object must satisfy Hooke's law for the object to undergo simple harmonic motion. The law states that the force must be directed always towards the equilibrium position and also directly proportional to the distance from this position.

6 0
3 years ago
When a 12 V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the
nataly862011 [7]

Answer:

Given: V=12 V

            I=2.5 mA

Let the resistance be R

By Ohm's Law, 

V=IR

12=2.5×10−3R

R=4.8×103 Ω

8 0
2 years ago
Other questions:
  • What is the mass number of a potassium atom that has 20 neutrons
    5·1 answer
  • What would happen if all the waste that the earth produces was put into space would that have a positive or negative effect
    9·1 answer
  • The temperature of the cosmic background radiation is measured to be 2.7 k. What is the wavelength of the peak in the spectral d
    14·1 answer
  • A light plane must reach a speed of 33 m/s per take off. How long a runway is needed if the constant acceleration is 3.0 m/s^2.
    7·1 answer
  • Electromagnetic waves are different from other types of waves because they can travel through?
    6·2 answers
  • If you double your speed, your kinetic energy will increase by:
    13·1 answer
  • A resistor with an unknown resistance is connected in parallel to a 13 Ω resistor. When both resistors are connected in parallel
    15·2 answers
  • What is cos(33°)?<br><br> A. 0.33<br> B. 0.84<br> C. 0.53<br> D. 0.65
    11·1 answer
  • A speedboat is moving at a rate of 45 km per hour travels a distance of 27 km. How long did it take to go to 27 km.
    15·1 answer
  • A 70 kg person walks 200 m in 4 seconds. What is their momentum?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!