Answer:
(A.) Hang curtains over the windows that will transmit sound waves and absorb light waves
The energy of a given wave in the electromagnetic spectrum is 2.64 × 10-21 joules, and the value of Planck's constant is 6.6 × 10-34 joule·seconds. What is the value of the frequency of the wave?
Answer:
the answer is b
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A car is coasting backwards downhill at a speed of 3.0 m/s when
the driver gets the engine started. After 2.5 sec, the car is
moving
uphill at 4.5 m/s. Assuming that uphill is the positive
direction, what is the car's average acceleration?
If a car is coasting backward downhill at a speed of 3. 0 meters / s when the driver gets the engine started. After 2.5 sec, the car is moving uphill at 4.5 meters / second . Assuming that uphill is the positive direction the average acceleration of the car would be 3.0 meters / second².
What is acceleration?The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter / seconds².
As given in the problem If a car is coasting backward downhill at a speed of 3. 0 meters / s when the driver gets the engine started. After 2.5 sec, the car is moving uphill at 4.5 meters / second .
The average acceleration of the car = + 4.5 - ( - 3 .0) / 2.5
= 3.0 meters / second ²
Thus , the average acceleration of the car would be 3.0 meters / second².
To learn more about acceleration here, refer to the link given below ;
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describe how an electromagnet can be switched on and off.
Answer:The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around. Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.
ILL MARK BRAINLEST
Question 13: A food web of the Yellowstone National Park ecosystem is
provided below. If a sudden outbreak of disease severely reduced the
number of wolves in Yellowstone National Park very rapidly, what are two
changes that might happen to the local food web? Fully explain using
claim, evidence, and reasoning.
Answer:
they all will die and so will we
Explanation:
Answer:
3 animals will thrive better
Explanation:
If the number of wolves is reduced, 3 animal species usually eaten by the wolves will have a better chance of survival.
How does the initial velocity of a projectile affect its range?
N - Projectiles with larger initial velocity will go farther
0 - Projectiles with larger initial velocities will not go as far
P-Initial velocity has no effect
Plzzz yaar guys help I really need this ( crying emoji )
Answer:
I believe it is the first one
TRUE OR FALSE: Aquaponics decreases cost for equipment, energy usage, and land usage. *
Answer: b
Explanation:
b
Answer:
b
Explanation:
b
A force, 10 N drags a mass 10 kg on a horizontal table with an acceleration of 0.2
m/s2. If the acceleration due to gravity is 10 m/s2, the coefficient of friction between
the moving mass and the table is?
Answer:
20&£+)##&843&()-_££-()&_2+0&&-£_!)
4 properties of light
Which list orders the types of forces from weakest at the top to strongest at
the bottom?
O A. Hydrogen bonds
Van der Waals forces
Metallic bonds
lonic bonds
B. Metallic bonds
Hydrogen bonds
Van der Waals forces
Ionic bonds
O C. Van der Waals forces
Hydrogen bonds
Metallic bonds
lonic bonds
D. Ionic bonds
Metallic bonds
Hydrogen bonds
Van der Waals forces
The list of the type of forces that are weakest at the top to strongest at the bottom is
Ionic bonds Metallic bondsHydrogen bondsVan der Waals forcesWhat are the types of forces?The type of force that impacts the objects are physical, tension and normal, gravitational, electric, and magnetic force. The force that is strongest is that of the iconic bonds and the weakest is that of the Van der Waals force.
Find out more information bout the types of forces.
brainly.com/question/26197441
Answer:
C. Van der Waals forces
Hydrogen bonds
Metallic bonds
Ionic bonds
Explanation:
This list orders the types of forces from weakest at the top to strongest at the bottom. Van der Waals forces are relatively weak intermolecular forces, followed by hydrogen bonds which are stronger. Metallic bonds are even stronger, and ionic bonds are the strongest among the listed forces.